Air quality index - Knowledge (XXG)

2637:, and Pb) for which short-term (up to 24-hourly averaging period) National Ambient Air Quality Standards are prescribed. Based on the measured ambient concentrations, corresponding standards and likely health impact, a sub-index is calculated for each of these pollutants. The worst sub-index reflects overall NAQI. Likely health impacts for different NAQI categories and pollutants have also been suggested, with primary inputs from the medical experts in the group. The NAQI values and corresponding ambient concentrations (health breakpoints) as well as associated likely health impacts for the identified eight pollutants are as follows: 1484:(AQHI) is a scale designed to help understand the impact of air quality on health. It is a health protection tool used to make decisions to reduce short-term exposure to air pollution by adjusting activity levels during increased levels of air pollution. The Air Quality Health Index also provides advice on how to improve air quality by proposing a behavioral change to reduce the environmental footprint. This index pays particular attention to people who are sensitive to air pollution. It provides them with advice on how to protect their health during air quality levels associated with 1093: 2161:

nor does it mean the pollutant is twice as harmful. While an AQI of 50 from day 1 to 182 and AQI of 100 from day 183 to 365 does provide an annual average of 75, it does not mean the pollution is acceptable even if the benchmark of 100 is deemed safe. Because the benchmark is a 24-hour target, and the annual average must match the annual target, it is entirely possible to have safe air every day of the year but still fail the annual pollution benchmark.

7836: 4706: 989: 1644:, is measured on a scale of 1 to 10+ and considers four air pollutants: ozone; nitrogen dioxide; sulfur dioxide and particulate matter (including PM10 and PM2.5). For any given hour the AQHI is calculated from the sum of the percentage excess risk of daily hospital admissions attributable to the 3-hour moving average concentrations of these four pollutants. The AQHIs are grouped into five AQHI health risk categories with health advice provided: 1148: 20: 4634: 4642:

monitoring data including AQI charts and maps are available at EPA's AirData website. There is a free email subscription service for New York inhabitants – AirNYC. Subscribers get notifications about the changes in the AQI values for the selected location (e.g. home address), based on air quality conditions. A detailed map containing current AQI levels and a two-day AQI forecast is available at the Aerostate web site.

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monitoring data or are predicted by means of a diffusion model. The concentrations were then converted into a standard statistical distribution with a preset mean and standard deviation. The resultant individual pollutant indices are assumed to be equally weighted, although values other than unity can be used. Likewise, the index can incorporate any number of pollutants although it was only used to combine

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of the air pollutant. Health effects corresponding to a given dose are established by epidemiological research. Air pollutants vary in potency, and the function used to convert from air pollutant concentration to AQI varies by pollutant. Its air quality index values are typically grouped into ranges.

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The initial iteration of the air quality index used standardized ambient pollutant concentrations to yield individual pollutant indices. These indices were then weighted and summed to form a single total air quality index. The overall methodology could use concentrations that are taken from ambient

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AQI requires a 24-hour average.) To accurately reflect the current air quality, the multi-hour average used for the AQI computation should be centered on the current time, but as concentrations of future hours are unknown and are difficult to estimate accurately, EPA uses surrogate concentrations to

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along with State Pollution Control Boards has been operating National Air Monitoring Program (NAMP) covering 240 cities of the country having more than 342 monitoring stations. An Expert Group comprising medical professionals, air quality experts, academia, advocacy groups, and SPCBs was constituted

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Real-time monitoring data from continuous monitors are typically available as 1-hour averages. However, computation of the AQI for some pollutants requires averaging over multiple hours of data. (For example, calculation of the ozone AQI requires computation of an 8-hour average and computation of

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The CAQI is a number on a scale from 0 to 100, where a low value means good air quality and a high value means poor air quality. The index is defined in both hourly and daily versions, and separately near roads (a "roadside" or "traffic" index) or away from roads (a "background" index). As of 2012,

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the air currently is or how polluted it is forecast to become. As air pollution levels rise, so does the AQI, along with the associated public health risk. Children, the elderly and individuals with respiratory or cardiovascular problems are typically the first groups affected by poor air quality.

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The Ministry of Environment of South Korea uses the Comprehensive Air-quality Index (CAI) to describe the ambient air quality based on the health risks of air pollution. The index aims to help the public easily understand the air quality and protect people's health. The CAI is on a scale from 0 to

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stated that having an air quality index that would be easy to present to the general public was a major motivation, leaving aside the more complex question of a health-based index, which would require, for example, effects of combined levels of different pollutants. The main aim of the CAQI was to

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The score for each pollutant is non-linear, as is the final AQI score. Thus an AQI of 300 does not mean twice the pollution of AQI at 150, nor does it mean the air is twice as harmful. The concentration of a pollutant when its IAQI is 100 does not equal twice its concentration when its IAQI is 50,

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The definition of the AQI in a particular nation reflects the discourse surrounding the development of national air quality standards in that nation. A website allowing government agencies anywhere in the world to submit their real-time air monitoring data for display using a common definition of

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Historically, EPA has only allowed data from regulatory monitors operated by regulatory or public health professionals to be included in its real time national maps. In the past decade, low cost sensors (LCS's) have become increasingly popular with citizen scientists, and large LCS networks have

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Real time monitoring data and forecasts of air quality that are color-coded in terms of the air quality index are available from EPA's AirNow web site. Other organizations provide monitoring for members of sensitive groups such as asthmatics, children and adults over the age of 65. Historical air

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The index is based on the concentrations of five pollutants. The index is calculated from the concentrations of the following pollutants: ozone, nitrogen dioxide, sulfur ioxide, PM2.5 and PM10. The breakpoints between index values are defined for each pollutant separately and the overall index is

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If multiple pollutants are measured at a monitoring site, then the largest or "dominant" AQI value is reported for the location. The ozone AQI between 100 and 300 is computed by selecting the larger of the AQI calculated with a 1-hour ozone value and the AQI computed with the 8-hour ozone value.

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The AQHI provides a number from 1 to 10+ to indicate the level of health risk associated with local air quality. On occasion, when the amount of air pollution is abnormally high, the number may exceed 10. The AQHI provides a local air quality current value as well as a local air quality maximums

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While the methodology was designed to be robust, the practical application for all metropolitan areas proved to be inconsistent due to the paucity of ambient air quality monitoring data, lack of agreement on weighting factors, and non-uniformity of air quality standards across geographical and

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An individual score (Individual Air Quality Index, IAQI) is calculated using breakpoint concentrations below, and using same piecewise linear function to calculate intermediate values as the US AQI scale. and The final AQI value can be calculated either per hour or per 24 hours and is

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500, which is divided into six categories. The higher the CAI value, the greater the level of air pollution. Of values of the five air pollutants, the highest is the CAI value. The index also has associated health effects and a colour representation of the categories as shown below.

2570:. IIT Kanpur and the Expert Group recommended an AQI scheme in 2014. While the earlier measuring index was limited to three indicators, the new index measures eight parameters. The continuous monitoring systems that provide data on near real-time basis are installed in New Delhi, 1479:

Air quality in Canada has been reported for many years with provincial air quality indices (AQIs). Significantly, AQI values reflect air quality management objectives, which are based on the lowest achievable emissions rate, rather than exclusive concern for human health. The

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Healthy people will experience reduced endurance in activities and may also show noticeably strong symptoms. Other illnesses may be triggered in healthy people. Elders and the sick should remain indoors and avoid exercise. Healthy individuals should avoid outdoor activities.

5483: 1181:, when the AQI indicates that acute exposure may cause significant harm to the public health, agencies may invoke emergency plans that allow them to order major emitters (such as coal burning industries) to curtail emissions until the hazardous conditions abate. 4674:

Jack Fensterstock, the head of the National Inventory of Air Pollution Emissions and Control Branch, was tasked to lead the development of the methodology and to compile the air quality and emissions data necessary to test and calibrate resultant indices.

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Across Australia, a consistent approach is taken with air quality indexes, using a simple linear scale where 100 represents the maximum concentration standard for each pollutant, as set by the NEPM. These maximum concentration standards are:

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stated that the "main goal of the CAQI is not to warn people for possible adverse health effects of poor air quality but to attract their attention to urban air pollution and its main source (traffic) and help them decrease their exposure."

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political boundaries. Despite these issues, the publication of lists ranking metropolitan areas achieved the public policy objectives and led to the future development of improved indices and their routine application.

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to report on its air quality, with details of the calculation similar but not identical to those used in Malaysia and Hong Kong. The PSI chart below is grouped by index values and descriptors, according to the

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strenuous physical exertion, particularly outdoors, and particularly if they experience symptoms. People with asthma may find they need to use their reliever inhalator more often. Older people should also

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monitor) that makes the LCS data comparable to regulatory data for the purpose of computing the AQI. This corrected LCS data currently appears alongside regulatory data on EPA's national fire map.

3203:(COMEAP). This index has ten points, which are further grouped into four bands: low, moderate, high and very high. Each of the bands comes with advice for at-risk groups and the general population. 3627:

Sensitive groups: Reduce prolonged or heavy exertion. It's OK to be active outside, but take more breaks and do less intense activities. Watch for symptoms such as coughing or shortness of breath.

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J.C Fensterstock et al., " The Development and Utilization of an Air Quality Index," Paper No. 69–73, presented at the 62nd Annual Meeting of the Air Pollution Control Administration, June 1969.

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Children, seniors and individuals with respiratory or heart diseases should avoid sustained and high-intensity outdoor exercises. General population should moderately reduce outdoor activities.

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If you have heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider.

2370:. A "sub-index" is calculated for each of the mandatory (and optional if available) components. The CAQI is defined as the sub-index that represents the worst quality among those components. 6036: 5878:"ENVIRONMENTAL PROTECTION AGENCY 40 CFR Parts 50, 51, 52, 53 and 58 [EPA-HQ-OAR-2008-0699; FRL-9913-18-OAR] RIN 2060-AP38 – National Ambient Air Quality Standards for Ozone" 1124:

The AQI can increase due to an increase of air emissions. For example, during rush hour traffic or when there is an upwind forest fire or from a lack of dilution of air pollutants.

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of the pollutant concentration. At the boundary between AQI categories, there is a discontinuous jump of one AQI unit. To convert from concentration to AQI this equation is used:

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Each state and territory publishes air quality data for individual monitoring locations, and most states and territories publish air quality indexes for each monitoring location.

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The AQI made its debut in 1968, when the National Air Pollution Control Administration undertook an initiative to develop an air quality index and to apply the methodology to

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Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

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which rounds to index value of 83, corresponding to air quality in the "Moderate" range. To convert an air pollutant concentration to an AQI, EPA has developed a calculator.

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Some of the key pollutant concentrations in μg/m for the hourly background index, the corresponding sub-indices, and five CAQI ranges and verbal descriptions are as follows.

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Unusually sensitive people: Consider reducing prolonged or heavy exertion. Watch for symptoms such as coughing or shortness of breath. These are signs to take it easier.

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Healthy people will commonly show symptoms. People with respiratory or heart diseases will be significantly affected and will experience reduced endurance in activities.

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A level that may have harmful impacts on patients and members of sensitive groups (children, aged or weak people), and also cause the general public unpleasant feelings

4203: 4167: 4041: 4129: 4096: 3983: 5422: 3713:(EPA) has developed an Air Quality Index that is used to report air quality. This AQI is divided into six categories indicating increasing levels of health concern. 2271:

Children, seniors and individuals with heart or lung diseases should stay indoors and avoid outdoor activities. General population should reduce outdoor activities.

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is responsible for monitoring air quality and publishing data in accordance with the National Environment Protection (Ambient Air Quality) Measure (NEPM) standards.

2526:(YACAQI) is also defined, in which different pollutant sub-indices are separately normalised to a value typically near unity. For example, the yearly averages of NO 5465: 3724:(NAAQS) for each of these pollutants in order to protect public health. An AQI value of 100 generally corresponds to the level of the NAAQS for the pollutant. The 7785: 5004: 1742:. As of January 1, 2013, MEP monitors daily pollution level in 163 of its major cities. The AQI level is based on the level of six atmospheric pollutants, namely 1375:

The air quality index (AQI) for an individual location is simply the highest of the air quality index values for each pollutant being monitored at that location.

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Eight-hour ozone averages do not define AQI values greater than 300; AQI values of 301 or greater are calculated with 1-hour ozone concentrations. 1-hour SO

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When the AQI is high, governmental bodies generally encourage people to reduce physical activity outdoors, or even avoid going out altogether. When

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speeds lets air pollution remain in a local area, leading to high concentrations of pollutants, chemical reactions between air contaminants and

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Everyone else: Avoid prolonged or heavy exertion. Consider moving activities indoors or rescheduling to a time when air quality is better.

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every five years to reflect evolving health effects information. The Air Quality Index is adjusted periodically to reflect these changes.

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advise sensitive groups, such as the elderly, children and those with respiratory or cardiovascular problems, to avoid outdoor exertion.

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Sensitive groups: Avoid prolonged or heavy exertion. Move activities indoors or reschedule to a time when the air quality is better.

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Sensitive individuals will experience more serious conditions. The hearts and respiratory systems of healthy people may be affected.

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Sensitive groups: Avoid all physical activity outdoors. Move activities indoors or reschedule to a time when air quality is better.

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Children, seniors and the sick should stay indoors and avoid physical exertion. General population should avoid outdoor activities.

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Some of the following websites display actively updated air quality index maps; others are archived versions of inactive websites:

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Children, seniors and individuals with respiratory or heart diseases should reduce sustained and high-intensity outdoor exercises.

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On a day when the AQI is predicted to be elevated due to fine particle pollution, an agency or public health organization might:

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sprung up in the US and across the globe. Recently, EPA has developed a data correction algorithm for a particular brand of PM

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reducing or rescheduling strenuous activities outdoors if you experience symptoms such as coughing and throat irritation.

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Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

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Healthy people may experience slight irritations and sensitive individuals will be slightly affected to a larger extent.

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are divided by 40 μg/m, 40 μg/m and 20 μg/m, respectively. The overall background or traffic YACAQI for a city is the

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argued that the CAQI had been evaluated on a "large set" of data, and described the CAQI's motivation and definition.

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declare an "action day" to encourage voluntary measures to reduce air emissions, such as using public transportation.

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values do not define higher AQI values greater than 200. AQI values of 201 or greater are calculated with 24-hour SO

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Sensitive groups: Remain indoors and keep activity levels low. Follow tips for keeping particle levels low indoors.

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is 45 or less. During the spring of 2012, the Tower was lit up for 52 days, which is four days more than in 2011.

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physical exertion, particularly outdoors, especially if you experience symptoms such as cough or sore throat.

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A level which may have a serious impact on patients and members of sensitive groups in case of acute exposure

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strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation.

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An air quality index (AQI) is an indicator developed by government agencies to communicate to the public how

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Members of sensitive groups may experience health effects. The general public is not likely to be affected.

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strenuous physical activity. People with asthma may find they need to use their reliever inhaler more often.

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recommend the use of masks outdoors and air purifiers indoors to keep fine particles from entering the lungs

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An annotated satellite photo showing smoke from wildfires in Greece, giving rise to an elevated AQI downwind

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defined as the maximum value of the index. Different averaging periods are used for different pollutants.

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People unusually sensitive to air pollution: Plan strenuous outdoor activities when air quality is better

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Frequently updated CAQI values and maps are shown on www.airqualitynow.eu and other websites. A separate

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your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.

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strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion.

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Barkjohn, Karoline K.; Holder, Amara L.; Frederick, Samuel G.; Clements, Andrea L. (January 2022).

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Everyone else: Reduce prolonged or heavy exertion. Take more breaks during all outdoor activities.

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have an index that would encourage wide comparison across the EU, without replacing local indices.

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Technical Assistance Document for the Reporting of Daily Air Quality – the Air Quality Index (AQI)

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Technical Assistance Document for the Reporting of Daily Air Quality – the Air Quality Index (AQI)

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People with asthma should follow their asthma action plans and keep quick relief medicine handy.

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Revised Air Quality Standards For Particle Pollution And Updates To The Air Quality Index (AQI)

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Health warnings of emergency conditions. The entire population is more likely to be affected.

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Each range is assigned a descriptor, a color code, and a standardized public health advisory.

642: 565: 558: 512: 379: 169: 164: 5526: 4509:) concentration of 26.4 micrograms per cubic meter. The equation above results in an AQI of: 4101: 4068: 3955: 3301:

Adults and children with lung problems, adults with heart problems, and older people, should

8843: 8802: 8785: 8672: 8570: 8102: 8006: 7890: 7835: 7673: 7574: 7532: 7500: 7394: 7348: 7308: 7215: 7183: 7151: 7136: 7120: 7095: 6880: 6834: 6471:- Example of how New Mexico Environment Department publishes their Air Quality and API data. 6337: 6319: 6270: 6252: 5973: 5937:"Final Reconsideration of the National Ambient Air Quality Standards for Particulate Matter" 4705: 4300: 1751: 1201: 1152: 1147: 1062: 988: 902: 799: 739: 625: 578: 527: 487: 462: 447: 429: 404: 344: 229: 179: 5547: 5315: 19: 8860: 8826: 8712: 8692: 8602: 8251: 8217: 8151: 7948: 7933: 7537: 7447: 7413: 7298: 7252: 7178: 7105: 7025: 6928: 6870: 6725: 6547: 6525: 5805:(Report). U.S. Environmental Protection Agency. May 2016. EPA-454/B-16-002. Archived from 5208: 4687: 4633: 4272: 2539: 1775: 1197: 687: 647: 517: 482: 414: 354: 282: 219: 119: 6443: 6315: 5069: 1566:

reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms.

1072:, corresponding to different national air quality standards. Some of these are Canada's 8901: 8848: 8758: 8677: 8662: 8657: 8609: 8497: 8293: 8241: 8224: 8058: 7850: 7584: 7470: 7427: 7421: 7417: 7262: 7247: 7198: 7188: 7100: 6954: 6710: 6681: 6342: 6299: 6275: 6240: 5839:. North Carolina: US EPA Office of Air Quality Planning and Standards. EPA-454/B-18-007 4896: 4823: 4734: 4283: 4046: 3988: 3933: 3911: 3176: 3132:

A level that will not impact patients suffering from diseases related to air pollution

2321: 1743: 1193: 1125: 1054: 1005: 809: 709: 664: 657: 652: 409: 104: 3183:, is illuminated in blue, from sunset to 23:00 and 22:00 in winter, on days where the 8962: 8865: 8702: 8592: 8549: 8330: 8207: 8093: 8043: 7907: 7604: 7505: 7291: 7220: 6992: 6740: 6604: 6089: 5138: 4719: 4680: 3172: 1117: 1045: 824: 314: 309: 304: 62: 6300:"Correction and Accuracy of PurpleAir PM2.5 Measurements for Extreme Wildfire Smoke" 8667: 8625: 8401: 8352: 8288: 8144: 8048: 7625: 7599: 7579: 7403: 7366: 7330: 6966: 6913: 6789: 6745: 6730: 6659: 4258: 4244: 3587:

Air quality is considered satisfactory, and air pollution poses little or no risk.

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forecast for today, tonight, and tomorrow, and provides associated health advice.

5379:"European Air Quality Index: current air quality information at your finger tips" 4875:

Cooperative Institute for Research In Environmental Sciences (cires.colorado.edu)

3893:{\displaystyle I={\frac {I_{high}-I_{low}}{C_{high}-C_{low}}}(C-C_{low})+I_{low}} 1586:

strenuous activities outdoors. Children and the elderly should also take it easy.

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Anyone experiencing discomfort such as sore eyes, cough or sore throat, should

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Adults and children with lung problems, and adults with heart problems, should

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A level which may have a meager impact on patients in case of chronic exposure

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Most air contaminants do not have an associated AQI. Many countries monitor

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and ozone air quality indices, this surrogate concentration is called the

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Affects healthy people and seriously impacts those with existing diseases

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Breathing discomfort to the people with lungs, asthma and heart diseases

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Some pollutants may slightly affect very few hypersensitive individuals.

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Adults and children with lung problems, and adults with heart problems,

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Barkjohn, Karoline K.; Gantt, Brett; Clements, Andrea L. (2021-06-22).

5466:"Air Quality Index in India: When it was set up and how it is measured" 5423:"India launches its own Air Quality Index. Can its numbers be trusted?" 5279:[Technical Regulation on Ambient Air Quality Index (on trial)] 3716:

The AQI is based on the five "criteria" pollutants regulated under the

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Ministry of Environmental Protection of the People's Republic of China

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Ministry of Environmental Protection of the People's Republic of China

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Only very few hypersensitive people should reduce outdoor activities.

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Sensitive groups: Cut back or reschedule strenuous outdoor activities

8597: 8562: 8386: 8342: 8190: 7988: 7678: 7658: 7552: 7227: 6720: 6504: 6139: 4845:"Create a Clean Room to Protect Indoor Air Quality During a Wildfire" 4795:"Create a Clean Room to Protect Indoor Air Quality During a Wildfire" 2571: 907: 887: 794: 784: 492: 7859: 4690:, and TSP because of a lack of available data for other pollutants. 3665:

Health alert: everyone may experience more serious health effects.

8630: 8470: 8396: 8183: 7688: 7630: 6971: 6903: 6801: 6693: 5066:"Air Quality Index (AQI) - A Guide to Air Quality and Your Health" 4632: 4230: 4216: 3696: 1779: 1156: 1146: 1091: 917: 862: 254: 18: 6015: 8575: 8431: 8426: 8406: 8280: 8231: 8075: 7663: 6784: 6772: 6688: 6169: 4820:"MACC Project - European Air Quality Monitoring and Forecasting" 2575: 2342:

the CAQI had two mandatory components for the roadside index, NO

1461:

Everyone: Significantly cut back on outdoor physical activities

1141: 1137: 892: 139: 134: 99: 7863: 6560: 6428:

Worldwide Air Pollution: Real-time Air Quality Index Visual Map

6090:"Air Quality Lookup for Children, Seniors and Sensitive Groups" 5403: 5139:"National Environment Protection (Ambient Air Quality) Measure" 8534: 8178: 6530: 6113: 1447:

Everyone: Cut back or reschedule strenuous outdoor activities

6535: 5346:

CiteairII — Common Information to European Air (2012-07-09).

5161:"Environment Canada - Air - AQHI categories and explanations" 4505:

Suppose a monitor records a 24-hour average fine particle (PM

2350:, and three mandatory components for the background index, NO 6556: 6365: 4575:{\displaystyle {\frac {100-51}{35.4-9.1}}(26.4-9.1)+51=83.2} 1786:) measured at the monitoring stations throughout each city. 6540: 6462: 6066: 3195:

The most commonly used air quality index in the UK is the

3060:

Minimise prolonged or strenuous outdoor physical exertion

2945:

Breathing discomfort to most people on prolonged exposure

1204:, and calculate air quality indices for these pollutants. 5593: 2203:

Everyone can continue their outdoor activities normally.

5183:"China's new Air Quality Index: How does it measure up?" 4613:

estimate these multi-hour averages. For reporting the PM

3218:

Accompanying health messages for the general population

3057:

Reduce prolonged or strenuous outdoor physical exertion

1459:

Sensitive groups: Avoid all outdoor physical activities

6501:- website of South Korea Environmental Management Corp. 3074:

Avoid prolonged or strenuous outdoor physical exertion

3063:

Avoid prolonged or strenuous outdoor physical exertion

1116:. Taken together, concentration and time represent the 4871:"How to mitigate post-fire smoke impacts in your home" 2550:

The National Air Quality Index (NAQI) was launched in

1378:

There are six AQI bands, with health advice for each:

4518: 4175: 4139: 4104: 4071: 4049: 4013: 3991: 3958: 3936: 3914: 3752: 3609:

Everyone else: It's a good day to be active outside.

2613:. The proposed NAQI will consider eight pollutants PM 1445:

Sensitive groups: Avoid strenuous outdoor activities

1208:

the air quality index has recently become available.

1177:

During a period of very poor air quality, such as an

5310: 5308: 5117: 3257:

strenuous physical activity, particularly outdoors.

3215:

Accompanying health messages for at-risk individuals

1108:

over a specified averaging period, obtained from an

1053:

result in a high AQI, the use of a mask (such as an

8879: 8737: 8618: 8478: 8469: 8279: 8074: 7987: 7957: 7906: 7897: 7748: 7697: 7646: 7613: 7446: 7385: 7347: 7329: 7129: 7064: 7001: 6927: 6896: 6861: 6845: 6810: 6603: 3012:Persons with Chronic Lung Disease or Heart Disease 1057:) outdoors and an air purifier (incorporating both 5640:"National Environment Agency - Calculation of PSI" 5341: 5339: 5337: 5335: 5333: 4574: 4197: 4161: 4123: 4090: 4055: 4035: 3997: 3977: 3942: 3920: 3892: 3201:Committee on the Medical Effects of Air Pollutants 6116:. US Environmental Protection Agency. 8 July 2014 5883:. Environmental Protection Agency. Archived from 5722:"Improved Air Quality Reflected in N Seoul Tower" 1766:), suspended particulates smaller than 2.5 μm in 3688:Everyone: Avoid all physical activity outdoors. 1803:Chinese AQI category and pollutant breakpoints 1758:), suspended particulates smaller than 10 μm in 5615:"MEWR - Key Environment Statistics - Clean Air" 4945:"Air Quality Index - American Lung Association" 2919:Minor breathing discomfort to sensitive people 5594:"::: Central Pollution Control Board :::" 5271: 5269: 5267: 5265: 1811:Units are in μg/m except CO, which is in mg/m 1734:China's Ministry of Environmental Protection ( 7875: 6572: 5617:. App.mewr.gov.sg. 2011-06-08. Archived from 5569:"India launches index to measure air quality" 5001:"FAQ: Use of masks and availability of masks" 3711:United States Environmental Protection Agency 1025: 8: 5772: 5770: 5093:"The EPA's Latest Threat to Economic Growth" 5060: 5058: 5056: 4646:Regulatory Air Monitors and Low Cost Sensors 1738:) is responsible for measuring the level of 6514:(inactive as of 19 February 2018) 5381:. European Environment Agency. 2017-11-16. 8741: 8475: 7903: 7882: 7868: 7860: 6579: 6565: 6557: 6136:"AirNYC - Air quality in New York. Online" 5029:US Experience on Emergency Response System 4043:= the concentration breakpoint that is ≥ 3985:= the concentration breakpoint that is ≤ 2958:Respiratory illness on prolonged exposure 2542:of a defined subset of these sub-indices. 2166:AQI and health implications (HJ 633–2012) 1032: 1018: 922: 48: 26: 6341: 6323: 6274: 6256: 5502:"Ambient Air Quality Monitoring Stations" 5068:. US EPA. 9 December 2011. Archived from 4519: 4517: 4180: 4174: 4169:= the index breakpoint corresponding to 4144: 4138: 4109: 4103: 4098:= the index breakpoint corresponding to 4076: 4070: 4048: 4018: 4012: 3990: 3963: 3957: 3935: 3913: 3878: 3856: 3828: 3806: 3788: 3766: 3759: 3751: 2385:Pollutant (hourly) concentration in μg/m 2362:. It also included optional pollutants PM 6479:- A Guide to Air Quality and Your Health 5287:(in Chinese). 2012-03-02. Archived from 5244:(in Chinese). 2012-03-02. Archived from 5236:[Ambient Air Quality Standards] 4211: 3557: 3320: 3205: 3111: 2996: 2880: 2639: 2375: 2164: 1801: 1646: 1506: 1380: 1234: 1069: 7720:Pollutant release and transfer register 6483:AQI at Meteorological Service of Canada 5966:"How does the EPA measure air quality?" 5909:"pm-naaqs-air-quality-index-fact-sheet" 4760: 3590:It's a great day to be active outside. 1104:Computation of the AQI requires an air 961: 925: 38: 4975:"Spare the Air - Summer Spare the Air" 3730:National Ambient Air Quality Standards 3722:National Ambient Air Quality Standards 2589:There are six NAQI categories, namely 1096:An air quality measurement station in 1065:filters) indoors are also encouraged. 6541:Unofficial PM25 AQI in Hanoi, Vietnam 6037:"How are your ozone maps calculated?" 5228: 5226: 3333:Sulfur dioxide, 15 minute mean (μg/m) 2566:and a technical study was awarded to 2524:Year Average Common Air Quality Index 7: 7810: 7051:Electromagnetic radiation and health 6488:San Francisco Bay Area Spare-the-Air 5753:"Review of the UK Air Quality Index" 4799:U.S. Environmental Protection Agency 3330:Nitrogen dioxide, hourly mean (μg/m) 1552:air quality for outdoor activities. 7826: 7818: 6909:Radium and radon in the environment 6469:New Mexico Air Quality and API data 6465:- cross-agency U.S. Government site 4897:"Step 2 - Dose-Response Assessment" 4209:The EPA's table of breakpoints is: 3327:Ozone, running 8 hourly mean (μg/m) 1642:Environmental Protection Department 1223:states and territories of Australia 260:Radium and radon in the environment 6245:Atmospheric Measurement Techniques 5026:A. Scott Voorhees (24 June 2014). 3009:Elderly, Pregnant Women, Children 14: 5673:. App2.nea.gov.sg. Archived from 5421:Rama Lakshmi (October 17, 2014). 3705:24-Hour AQI Loop, Courtesy US EPA 3290:activity, particularly outdoors. 2554:on September 17, 2014, under the 1475:Air Quality Health Index (Canada) 8943: 8942: 7844: 7834: 7825: 7817: 7809: 7797: 7796: 4704: 999: 987: 6623:Atmospheric dispersion modeling 5385:from the original on 2017-12-24 5360:from the original on 2016-02-22 4412:Unhealthy for Sensitive Groups 3950:= the pollutant concentration, 3728:requires the EPA to review its 3618:Unhealthy for Sensitive Groups 3347:particles, 24 hour mean (μg/m) 3263:your usual outdoor activities. 3238:your usual outdoor activities. 2563:Central Pollution Control Board 1244:Maximum concentration standard 1068:Different countries have their 80:Atmospheric dispersion modeling 5830:David Mintz (September 2018). 5091:Jay Timmons (13 August 2014). 4669:Metropolitan Statistical Areas 4629:Public availability of the AQI 4557: 4545: 3868: 3843: 3340:particles, 24 hour mean (μg/m) 3232:your usual outdoor activities. 1640:. This index, reported by the 1546:your usual outdoor activities. 949:Least polluted cities by PM2.5 1: 7111:Electrical resistance heating 5728:. 18 May 2012. Archived from 5671:"National Environment Agency" 5211:. Government of the Hong Kong 420:Electrical resistance heating 7908:Pollution / quality 6763:Persistent organic pollutant 6505:Malaysia Air Pollution Index 5972:. 2019-02-06. Archived from 1636:with a new index called the 130:Persistent organic pollutant 54:Air pollution from a factory 7773:Least polluted cities by PM 6448:European Environment Agency 5698:. Air Korea. Archived from 4918:Myanmar government (2007). 4769:"International Air Quality" 3928:= the (Air Quality) index, 3740:The air quality index is a 2992:National Environment Agency 2306:European Environment Agency 9000: 7715:Pollution haven hypothesis 7638:Brain health and pollution 6876:Ecological light pollution 6706:Internal combustion engine 6453:The UK Air Quality Archive 6016:"AirNow API Documentation" 5573:timesofindia-economictimes 5523:"Indian Air Quality Index" 5209:"Air Quality Health Index" 3726:Clean Air Act (USA) (1990) 3091:Minimise outdoor activity 3077:Minimise outdoor activity 2310:European Air Quality Index 1810: 1472: 8938: 8744: 8479:Types / location 7794: 7518:Nonpoint source pollution 7438:War and environmental law 6797:Volatile organic compound 6594: 6094:www.cleanairresources.com 5778:"Daily Air Quality Index" 5118:"World Air Quality Index" 4949:American Lung Association 4730:Air pollution measurement 4725:Air pollution forecasting 3742:piecewise linear function 2987:Pollutant Standards Index 2389: 2384: 1701: 1675: 1657: 1515: 1354: 1335: 1297: 1278: 1259: 1082:Pollutant Standards Index 675:War and environmental law 295:Health effects from noise 145:Volatile organic compound 6977:Marine mammals and sonar 6888:Radio spectrum pollution 6258:10.5194/amt-14-4617-2021 6216:"AirNow Interactive Map" 6192:"AirNow Interactive Map" 5277:"环境空气质量指数(AQI) 技术规定(试行)" 4637:A global air quality map 4198:{\displaystyle C_{high}} 4162:{\displaystyle I_{high}} 4036:{\displaystyle C_{high}} 2893:Possible Health Impacts 2302:Common Air Quality Index 2200:No health implications. 2186:Recommended Precautions 1638:Air Quality Health Index 1513:Air Quality Health Index 1482:Air Quality Health Index 1074:Air Quality Health Index 300:Marine mammals and sonar 16:Measure of air pollution 7823:WikiProject Environment 7781:Most polluted countries 7725:Polluter pays principle 7456:Agricultural wastewater 5452:Business Standard India 4750:Ultra Low Emission Zone 4124:{\displaystyle C_{low}} 4091:{\displaystyle I_{low}} 3978:{\displaystyle C_{low}} 3251:who experience symptoms 3197:Daily Air Quality Index 3097:Avoid outdoor activity 3094:Avoid outdoor activity 3080:Avoid outdoor activity 1155:, Texas, indicating an 1106:pollutant concentration 1070:own air quality indices 775:Freshwater salinization 695:Agricultural wastewater 7841:Environment portal 7074:Agricultural pollution 5163:. Ec.gc.ca. 2008-04-16 4638: 4576: 4199: 4163: 4125: 4092: 4057: 4037: 3999: 3979: 3944: 3922: 3894: 3706: 3573:What should people do 1740:air pollution in China 1628:On December 30, 2013, 1160: 1101: 994:Environment portal 24: 8984:Environmental indices 7496:Industrial wastewater 7362:Clutter (advertising) 7270:Municipal solid waste 7116:Soil guideline values 6960:Sustainable transport 6853:Information pollution 6653:Open burning of waste 6499:CAI at Airkorea.or.kr 6477:EPA Air Quality Index 4636: 4577: 4200: 4164: 4126: 4093: 4058: 4038: 4000: 3980: 3945: 3923: 3895: 3700: 3209:Air Pollution Banding 2735:Satisfactory (51-100) 2556:Swachh Bharat Abhiyan 1799:of these six scores. 1179:air pollution episode 1150: 1134:temperature inversion 1128:, often caused by an 1095: 735:Industrial wastewater 503:Municipal solid waste 425:Soil guideline values 22: 8854:remnant natural area 8491:storage and recovery 8157:habitat conservation 7975:Deforestation (REDD) 7768:Most polluted cities 7461:Biological pollution 7372:Overhead power lines 6401:. US EPA. 2023-06-29 6366:"Fire and Smoke Map" 5316:"Indices definition" 4516: 4173: 4137: 4102: 4069: 4047: 4011: 3989: 3956: 3934: 3912: 3750: 3570:Health implications 3185:air quality in Seoul 2643:AQI Category (Range) 2248:Moderately Polluted 2183:Health Implications 2174:Air Pollution Level 1768:aerodynamic diameter 1760:aerodynamic diameter 1610:Reduce or reschedule 1584:Reduce or reschedule 944:Most polluted cities 596:Overhead power lines 8974:Atmosphere of Earth 8808:Earth Overshoot Day 8382:Marine conservation 8363:non-timber products 7831:WikiProject Ecology 7528:Ocean acidification 7433:Unexploded ordnance 7304:Post-consumer waste 7164:Foam food container 7142:Biodegradable waste 6716:Global distillation 6316:2022Senso..22.9669B 6172:on 15 February 2018 6162:"Aerostate AQI map" 6069:on 24 November 2005 5970:www.purakamasks.com 5472:. 17 November 2021. 4899:. 26 September 2013 3199:recommended by the 2822:Very Poor (301-400) 2382:Index or sub-index 2324:-supported project 2167: 1804: 1634:Air Pollution Index 1212:Indices by location 1078:Air Pollution Index 760:Ocean acidification 670:Unexploded ordnance 591:Advertising clutter 523:Post-consumer waste 468:Foam food container 453:Biodegradable waste 110:Global distillation 8793:Ecosystem services 7916:Ambient standards 7851:Ecology portal 7735:Waste minimisation 7710:Industrial ecology 7705:Cleaner production 7523:Nutrient pollution 7400:Herbicidal warfare 7194:Construction waste 6830:Introduced species 6701:Indoor air quality 6628:Chlorofluorocarbon 6546:2017-06-17 at the 6524:2017-06-06 at the 5946:. February 7, 2024 5454:. 17 October 2014. 4926:on 27 January 2007 4851:. November 1, 2023 4801:. 12 December 2018 4740:Indoor air quality 4712:Environment portal 4663:History of the AQI 4639: 4572: 4195: 4159: 4121: 4088: 4053: 4033: 3995: 3975: 3940: 3918: 3890: 3707: 3283:physical exertion. 3181:Seoul, South Korea 3046:Normal activities 3043:Normal activities 3040:Normal activities 3029:Normal activities 3026:Normal activities 3023:Normal activities 2764:Moderate (101-200) 2282:Severely Polluted 2165: 1802: 1531:General Population 1526:At Risk Population 1186:ground-level ozone 1161: 1102: 1080:, and Singapore's 1006:Ecology portal 631:Herbicidal warfare 175:Introduced species 115:Indoor air quality 85:Chlorofluorocarbon 25: 8969:Air quality index 8956: 8955: 8934: 8933: 8733: 8732: 8412:genetic resources 8348:genetic resources 7983: 7982: 7891:Natural resources 7857: 7856: 7730:Pollution control 7410:Nuclear holocaust 7319:Thermal treatment 7287:Plastic pollution 7204:Mercury poisoning 7157:Battery recycling 7056:Radioactive waste 6825:Genetic pollution 6820:Biological hazard 6618:Air quality index 6490:- AQI explanation 6463:AQI at airnow.gov 6325:10.3390/s22249669 6043:on 21 August 2015 5141:. 3 February 2016 4955:on 28 August 2015 4877:. January 4, 2022 4745:Low emission zone 4543: 4503: 4502: 4056:{\displaystyle C} 3998:{\displaystyle C} 3943:{\displaystyle C} 3921:{\displaystyle I} 3841: 3736:Computing the AQI 3695: 3694: 3551: 3550: 3315: 3314: 3288:consider reducing 3255:consider reducing 3169: 3168: 3101: 3100: 2975: 2974: 2879: 2878: 2520: 2519: 2379:Qualitative name 2293: 2292: 2265:Heavily Polluted 2231:Lightly Polluted 2157: 2156: 1808:Individual index 1727: 1726: 1616: 1615: 1570:No need to modify 1466: 1465: 1412:Enjoy activities 1401:Enjoy activities 1373: 1372: 1260:Nitrogen dioxide 1241:Averaging period 1042: 1041: 977: 976: 643:Nuclear holocaust 566:Urban heat island 380:Radioactive waste 165:Biological hazard 75:Air quality index 8991: 8946: 8945: 8897: 8844:Natural heritage 8803:overexploitation 8742: 8476: 8422:herbal medicines 8402:FAO Plant Treaty 7942: 7919: 7904: 7884: 7877: 7870: 7861: 7849: 7848: 7847: 7839: 7838: 7829: 7828: 7821: 7820: 7813: 7812: 7800: 7799: 7674:Legacy pollution 7533:Oil exploitation 7395:Chemical warfare 7309:Waste management 7216:Industrial waste 7184:Biomedical waste 7152:Electronic waste 7137:Advertising mail 7121:Phytoremediation 7096:Land degradation 6881:Overillumination 6835:Invasive species 6581: 6574: 6567: 6558: 6510:API at Hong Kong 6410: 6409: 6407: 6406: 6395: 6389: 6386: 6380: 6379: 6377: 6376: 6362: 6356: 6355: 6345: 6327: 6295: 6289: 6288: 6278: 6260: 6251:(6): 4617–4637. 6236: 6230: 6229: 6227: 6226: 6212: 6206: 6205: 6203: 6202: 6188: 6182: 6181: 6179: 6177: 6168:. Archived from 6158: 6152: 6151: 6149: 6147: 6138:. Archived from 6132: 6126: 6125: 6123: 6121: 6110: 6104: 6103: 6101: 6100: 6086: 6080: 6078: 6076: 6074: 6065:. Archived from 6059: 6053: 6052: 6050: 6048: 6039:. Archived from 6033: 6027: 6026: 6024: 6022: 6012: 6006: 6005: 6003: 6001: 5995:"AQI Calculator" 5991: 5985: 5984: 5982: 5981: 5962: 5956: 5955: 5953: 5951: 5941: 5933: 5927: 5926: 5924: 5922: 5913: 5905: 5899: 5898: 5896: 5895: 5889: 5882: 5874: 5868: 5867: 5865: 5855: 5849: 5848: 5846: 5844: 5838: 5827: 5821: 5820: 5818: 5817: 5811: 5804: 5796: 5790: 5789: 5774: 5765: 5764: 5759:. Archived from 5748: 5742: 5741: 5739: 5737: 5718: 5712: 5711: 5709: 5707: 5692: 5686: 5685: 5683: 5682: 5667: 5661: 5660: 5658: 5657: 5651: 5645:. Archived from 5644: 5636: 5630: 5629: 5627: 5626: 5611: 5605: 5604: 5602: 5600: 5590: 5584: 5583: 5581: 5579: 5565: 5559: 5558: 5556: 5554: 5544: 5538: 5537: 5535: 5534: 5525:. Archived from 5519: 5513: 5512: 5510: 5509: 5498: 5492: 5491: 5480: 5474: 5473: 5462: 5456: 5455: 5444: 5438: 5437: 5435: 5433: 5418: 5412: 5411: 5408:airqualitynow.eu 5400: 5394: 5393: 5391: 5390: 5375: 5369: 5368: 5366: 5365: 5359: 5352: 5343: 5328: 5327: 5325: 5323: 5312: 5303: 5302: 5300: 5299: 5293: 5282: 5273: 5260: 5259: 5257: 5256: 5250: 5239: 5230: 5221: 5220: 5218: 5216: 5205: 5199: 5198: 5196: 5194: 5189:on July 17, 2013 5185:. Archived from 5178: 5172: 5171: 5169: 5168: 5157: 5151: 5150: 5148: 5146: 5135: 5129: 5128: 5126: 5124: 5114: 5108: 5107: 5105: 5103: 5088: 5082: 5081: 5079: 5077: 5062: 5051: 5050: 5048: 5047: 5041: 5034: 5023: 5017: 5016: 5014: 5012: 5003:. Archived from 4997: 4991: 4990: 4988: 4986: 4977:. Archived from 4971: 4965: 4964: 4962: 4960: 4951:. Archived from 4941: 4935: 4934: 4932: 4931: 4922:. Archived from 4915: 4909: 4908: 4906: 4904: 4893: 4887: 4886: 4884: 4882: 4867: 4861: 4860: 4858: 4856: 4841: 4835: 4834: 4832: 4831: 4822:. Archived from 4816: 4810: 4809: 4807: 4806: 4791: 4785: 4784: 4782: 4780: 4771:. Archived from 4765: 4714: 4709: 4708: 4600:concentrations. 4581: 4579: 4578: 4573: 4544: 4542: 4531: 4520: 4295: 4212: 4204: 4202: 4201: 4196: 4194: 4193: 4168: 4166: 4165: 4160: 4158: 4157: 4130: 4128: 4127: 4122: 4120: 4119: 4097: 4095: 4094: 4089: 4087: 4086: 4062: 4060: 4059: 4054: 4042: 4040: 4039: 4034: 4032: 4031: 4004: 4002: 4001: 3996: 3984: 3982: 3981: 3976: 3974: 3973: 3949: 3947: 3946: 3941: 3927: 3925: 3924: 3919: 3899: 3897: 3896: 3891: 3889: 3888: 3867: 3866: 3842: 3840: 3839: 3838: 3820: 3819: 3800: 3799: 3798: 3780: 3779: 3760: 3558: 3321: 3206: 3112: 3006:Healthy Persons 2997: 2881: 2851:Severe (401-500) 2640: 2416:(optional) μg/m 2376: 2320:As of 2012, the 2168: 1805: 1752:nitrogen dioxide 1647: 1516:Health Messages 1507: 1381: 1249:Carbon monoxide 1235: 1202:nitrogen dioxide 1153:Gulfton, Houston 1063:activated carbon 1034: 1027: 1020: 1004: 1003: 1002: 992: 991: 923: 626:Chemical warfare 528:Waste management 488:Industrial waste 463:Electronic waste 448:Advertising mail 430:Phytoremediation 405:Land degradation 345:Depleted uranium 230:Overillumination 180:Invasive species 52: 42: 27: 8999: 8998: 8994: 8993: 8992: 8990: 8989: 8988: 8959: 8958: 8957: 8952: 8930: 8895: 8875: 8861:Systems ecology 8827:Natural capital 8729: 8614: 8603:reclaimed water 8465: 8427:UPOV Convention 8275: 8070: 7979: 7953: 7949:Ozone depletion 7940: 7917: 7893: 7888: 7858: 7853: 7845: 7843: 7833: 7790: 7776: 7744: 7693: 7642: 7609: 7548:Pharmaceuticals 7538:Oil exploration 7442: 7414:Nuclear fallout 7381: 7343: 7325: 7299:Packaging waste 7253:Deep sea mining 7179:Hazardous waste 7125: 7106:Open defecation 7060: 7026:Nuclear fallout 7021:Nuclear fission 6997: 6923: 6892: 6863:Electromagnetic 6857: 6841: 6806: 6726:Ozone depletion 6599: 6590: 6585: 6548:Wayback Machine 6526:Wayback Machine 6519:AQI in Thailand 6459:North America: 6440:- AirqualityNow 6418: 6413: 6404: 6402: 6397: 6396: 6392: 6387: 6383: 6374: 6372: 6370:fire.airnow.gov 6364: 6363: 6359: 6297: 6296: 6292: 6238: 6237: 6233: 6224: 6222: 6214: 6213: 6209: 6200: 6198: 6190: 6189: 6185: 6175: 6173: 6160: 6159: 6155: 6145: 6143: 6134: 6133: 6129: 6119: 6117: 6112: 6111: 6107: 6098: 6096: 6088: 6087: 6083: 6072: 6070: 6061: 6060: 6056: 6046: 6044: 6035: 6034: 6030: 6020: 6018: 6014: 6013: 6009: 5999: 5997: 5993: 5992: 5988: 5979: 5977: 5964: 5963: 5959: 5949: 5947: 5939: 5935: 5934: 5930: 5920: 5918: 5911: 5907: 5906: 5902: 5893: 5891: 5887: 5880: 5876: 5875: 5871: 5863: 5857: 5856: 5852: 5842: 5840: 5836: 5829: 5828: 5824: 5815: 5813: 5809: 5802: 5798: 5797: 5793: 5776: 5775: 5768: 5750: 5749: 5745: 5735: 5733: 5732:on 4 March 2014 5720: 5719: 5715: 5705: 5703: 5702:on 22 June 2018 5694: 5693: 5689: 5680: 5678: 5669: 5668: 5664: 5655: 5653: 5649: 5642: 5638: 5637: 5633: 5624: 5622: 5613: 5612: 5608: 5598: 5596: 5592: 5591: 5587: 5577: 5575: 5567: 5566: 5562: 5552: 5550: 5546: 5545: 5541: 5532: 5530: 5521: 5520: 5516: 5507: 5505: 5500: 5499: 5495: 5482: 5481: 5477: 5464: 5463: 5459: 5446: 5445: 5441: 5431: 5429: 5427:Washington Post 5420: 5419: 5415: 5402: 5401: 5397: 5388: 5386: 5377: 5376: 5372: 5363: 5361: 5357: 5350: 5345: 5344: 5331: 5321: 5319: 5314: 5313: 5306: 5297: 5295: 5291: 5280: 5275: 5274: 5263: 5254: 5252: 5248: 5237: 5232: 5231: 5224: 5214: 5212: 5207: 5206: 5202: 5192: 5190: 5180: 5179: 5175: 5166: 5164: 5159: 5158: 5154: 5144: 5142: 5137: 5136: 5132: 5122: 5120: 5116: 5115: 5111: 5101: 5099: 5090: 5089: 5085: 5075: 5073: 5072:on 18 June 2018 5064: 5063: 5054: 5045: 5043: 5039: 5032: 5025: 5024: 5020: 5010: 5008: 4999: 4998: 4994: 4984: 4982: 4981:on 11 June 2018 4973: 4972: 4968: 4958: 4956: 4943: 4942: 4938: 4929: 4927: 4917: 4916: 4912: 4902: 4900: 4895: 4894: 4890: 4880: 4878: 4869: 4868: 4864: 4854: 4852: 4843: 4842: 4838: 4829: 4827: 4818: 4817: 4813: 4804: 4802: 4793: 4792: 4788: 4778: 4776: 4775:on 12 June 2018 4767: 4766: 4762: 4758: 4710: 4703: 4700: 4684: 4665: 4654: 4648: 4631: 4620: 4616: 4611: 4607: 4599: 4595: 4532: 4521: 4514: 4513: 4508: 4470:Very Unhealthy 4304: 4293: 4287: 4262: 4248: 4234: 4220: 4176: 4171: 4170: 4140: 4135: 4134: 4105: 4100: 4099: 4072: 4067: 4066: 4045: 4044: 4014: 4009: 4008: 3987: 3986: 3959: 3954: 3953: 3932: 3931: 3910: 3909: 3874: 3852: 3824: 3802: 3801: 3784: 3762: 3761: 3748: 3747: 3738: 3704: 3659:Very Unhealthy 3630: 3628: 3556: 3346: 3339: 3193: 3177:Namsan Mountain 3121:Health Effects 3106: 3071:Very Unhealthy 2980: 2906:Minimal impact 2700: 2695: 2694: 2687: 2686: 2679: 2674: 2673: 2666: 2665: 2658: 2657: 2650: 2649: 2636: 2632: 2628: 2624: 2620: 2616: 2548: 2540:arithmetic mean 2537: 2533: 2529: 2415: 2408: 2402: 2395: 2369: 2365: 2361: 2357: 2353: 2349: 2345: 2318: 2298: 2179: 2178: 1877: 1870: 1863: 1850: 1843: 1836: 1829: 1822: 1785: 1776:carbon monoxide 1773: 1765: 1757: 1749: 1732: 1626: 1621: 1477: 1471: 1298:Sulfur dioxide 1219: 1214: 1198:carbon monoxide 1090: 1038: 1000: 998: 986: 979: 978: 878: 870: 869: 843: 835: 834: 770:Pharmaceuticals 750:Nonpoint source 690: 680: 679: 648:Nuclear fallout 621: 611: 610: 581: 571: 570: 561: 551: 550: 541: 533: 532: 518:Packaging waste 483:Hazardous waste 443: 435: 434: 395: 385: 384: 355:Nuclear fallout 350:Nuclear fission 330: 320: 319: 285: 275: 274: 250: 242: 241: 215: 213:Electromagnetic 205: 204: 195: 187: 186: 160: 150: 149: 120:Ozone depletion 65: 55: 40: 17: 12: 11: 5: 8997: 8995: 8987: 8986: 8981: 8976: 8971: 8961: 8960: 8954: 8953: 8951: 8950: 8939: 8936: 8935: 8932: 8931: 8929: 8928: 8919: 8914: 8909: 8904: 8899: 8896:(perpetuation) 8891: 8885: 8883: 8877: 8876: 8874: 8873: 8868: 8863: 8858: 8857: 8856: 8849:Nature reserve 8846: 8841: 8840: 8839: 8834: 8824: 8823: 8822: 8812: 8811: 8810: 8805: 8795: 8790: 8789: 8788: 8783: 8773: 8772: 8771: 8766: 8761: 8756: 8745: 8739: 8735: 8734: 8731: 8730: 8728: 8727: 8726: 8725: 8720: 8710: 8705: 8700: 8695: 8690: 8685: 8680: 8675: 8670: 8665: 8660: 8655: 8654: 8653: 8643: 8638: 8633: 8628: 8622: 8620: 8616: 8615: 8613: 8612: 8607: 8606: 8605: 8595: 8590: 8585: 8584: 8583: 8573: 8568: 8567: 8566: 8554: 8553: 8552: 8547: 8542: 8532: 8527: 8526: 8525: 8520: 8515: 8505: 8500: 8495: 8494: 8493: 8482: 8480: 8473: 8467: 8466: 8464: 8463: 8462: 8461: 8456: 8446: 8441: 8436: 8435: 8434: 8429: 8424: 8419: 8414: 8409: 8404: 8394: 8389: 8384: 8379: 8378: 8377: 8367: 8366: 8365: 8360: 8355: 8350: 8340: 8339: 8338: 8333: 8328: 8326:climate change 8318: 8313: 8308: 8303: 8302: 8301: 8294:Bioprospecting 8291: 8285: 8283: 8277: 8276: 8274: 8273: 8272: 8271: 8266: 8256: 8255: 8254: 8249: 8244: 8239: 8229: 8228: 8227: 8222: 8221: 8220: 8215: 8205: 8204: 8203: 8198: 8188: 8187: 8186: 8176: 8171: 8161: 8160: 8159: 8149: 8148: 8147: 8137: 8136: 8135: 8130: 8125: 8120: 8110: 8105: 8100: 8099: 8098: 8097: 8096: 8080: 8078: 8072: 8071: 8069: 8068: 8063: 8062: 8061: 8056: 8046: 8041: 8036: 8031: 8009: 8004: 7999: 7993: 7991: 7985: 7984: 7981: 7980: 7978: 7977: 7972: 7967: 7961: 7959: 7955: 7954: 7952: 7951: 7946: 7945: 7944: 7939:Clean Air Act 7931: 7926: 7921: 7912: 7910: 7901: 7895: 7894: 7889: 7887: 7886: 7879: 7872: 7864: 7855: 7854: 7795: 7792: 7791: 7789: 7788: 7783: 7778: 7774: 7770: 7765: 7763:Law by country 7760: 7754: 7752: 7746: 7745: 7743: 7742: 7737: 7732: 7727: 7722: 7717: 7712: 7707: 7701: 7699: 7695: 7694: 7692: 7691: 7686: 7681: 7676: 7671: 7666: 7661: 7656: 7650: 7648: 7644: 7643: 7641: 7640: 7635: 7634: 7633: 7628: 7617: 7615: 7611: 7610: 7608: 7607: 7602: 7597: 7592: 7587: 7585:Surface runoff 7582: 7577: 7572: 7567: 7566: 7565: 7560: 7550: 7545: 7540: 7535: 7530: 7525: 7520: 7515: 7510: 7509: 7508: 7498: 7493: 7488: 7483: 7478: 7473: 7471:Eutrophication 7468: 7463: 7458: 7452: 7450: 7444: 7443: 7441: 7440: 7435: 7430: 7428:Scorched earth 7425: 7422:nuclear winter 7418:nuclear famine 7407: 7397: 7391: 7389: 7383: 7382: 7380: 7379: 7374: 7369: 7364: 7359: 7353: 7351: 7345: 7344: 7342: 7341: 7335: 7333: 7327: 7326: 7324: 7323: 7322: 7321: 7316: 7306: 7301: 7296: 7295: 7294: 7284: 7279: 7278: 7277: 7267: 7266: 7265: 7263:Uranium mining 7260: 7255: 7250: 7248:Surface mining 7245: 7240: 7230: 7225: 7224: 7223: 7213: 7212: 7211: 7206: 7201: 7199:Lead poisoning 7196: 7191: 7189:Chemical waste 7186: 7176: 7171: 7166: 7161: 7160: 7159: 7149: 7144: 7139: 7133: 7131: 7127: 7126: 7124: 7123: 7118: 7113: 7108: 7103: 7101:Bioremediation 7098: 7093: 7092: 7091: 7086: 7081: 7070: 7068: 7062: 7061: 7059: 7058: 7053: 7048: 7043: 7038: 7033: 7028: 7023: 7018: 7016:Bioremediation 7013: 7007: 7005: 6999: 6998: 6996: 6995: 6990: 6987: 6984: 6981: 6980: 6979: 6969: 6964: 6963: 6962: 6957: 6952: 6947: 6942: 6937:Transportation 6933: 6931: 6925: 6924: 6922: 6921: 6916: 6911: 6906: 6900: 6898: 6894: 6893: 6891: 6890: 6885: 6884: 6883: 6878: 6867: 6865: 6859: 6858: 6856: 6855: 6849: 6847: 6843: 6842: 6840: 6839: 6838: 6837: 6827: 6822: 6816: 6814: 6808: 6807: 6805: 6804: 6799: 6794: 6793: 6792: 6782: 6781: 6780: 6770: 6765: 6760: 6759: 6758: 6753: 6748: 6743: 6738: 6728: 6723: 6718: 6713: 6711:Global dimming 6708: 6703: 6698: 6697: 6696: 6686: 6685: 6684: 6682:Diesel exhaust 6674: 6669: 6668: 6667: 6657: 6656: 6655: 6650: 6645: 6640: 6630: 6625: 6620: 6615: 6609: 6607: 6601: 6600: 6595: 6592: 6591: 6586: 6584: 6583: 6576: 6569: 6561: 6555: 6554: 6553: 6552: 6551: 6550: 6538: 6531:AQI in Vietnam 6528: 6516: 6507: 6502: 6493: 6492: 6491: 6485: 6480: 6474: 6472: 6466: 6457: 6456: 6455: 6450: 6441: 6432: 6431: 6430: 6417: 6416:External links 6414: 6412: 6411: 6390: 6381: 6357: 6290: 6231: 6220:gispub.epa.gov 6207: 6196:gispub.epa.gov 6183: 6153: 6142:on 22 May 2017 6127: 6105: 6081: 6054: 6028: 6007: 5986: 5957: 5928: 5900: 5869: 5850: 5822: 5791: 5782:Air UK Website 5766: 5763:on 2011-11-15. 5757:COMEAP website 5743: 5713: 5687: 5662: 5631: 5606: 5585: 5560: 5539: 5514: 5493: 5475: 5457: 5439: 5413: 5395: 5370: 5329: 5304: 5261: 5222: 5200: 5173: 5152: 5130: 5109: 5083: 5052: 5018: 4992: 4966: 4936: 4910: 4888: 4862: 4836: 4811: 4786: 4759: 4757: 4754: 4753: 4752: 4747: 4742: 4737: 4735:Clean air zone 4732: 4727: 4722: 4716: 4715: 4699: 4696: 4682: 4664: 4661: 4652: 4647: 4644: 4630: 4627: 4618: 4614: 4609: 4605: 4597: 4593: 4583: 4582: 4571: 4568: 4565: 4562: 4559: 4556: 4553: 4550: 4547: 4541: 4538: 4535: 4530: 4527: 4524: 4506: 4501: 4500: 4497: 4494: 4491: 4488: 4485: 4482: 4479: 4476: 4472: 4471: 4468: 4465: 4462: 4459: 4456: 4453: 4450: 4447: 4443: 4442: 4439: 4436: 4433: 4430: 4427: 4424: 4421: 4418: 4414: 4413: 4410: 4407: 4404: 4401: 4398: 4395: 4392: 4389: 4385: 4384: 4381: 4378: 4375: 4372: 4369: 4366: 4363: 4360: 4356: 4355: 4352: 4349: 4346: 4343: 4340: 4337: 4334: 4331: 4327: 4326: 4316: 4311: 4302: 4297: 4285: 4280: 4269: 4260: 4255: 4246: 4241: 4232: 4227: 4218: 4207: 4206: 4192: 4189: 4186: 4183: 4179: 4156: 4153: 4150: 4147: 4143: 4132: 4118: 4115: 4112: 4108: 4085: 4082: 4079: 4075: 4064: 4052: 4030: 4027: 4024: 4021: 4017: 4006: 3994: 3972: 3969: 3966: 3962: 3951: 3939: 3929: 3917: 3887: 3884: 3881: 3877: 3873: 3870: 3865: 3862: 3859: 3855: 3851: 3848: 3845: 3837: 3834: 3831: 3827: 3823: 3818: 3815: 3812: 3809: 3805: 3797: 3794: 3791: 3787: 3783: 3778: 3775: 3772: 3769: 3765: 3758: 3755: 3737: 3734: 3702: 3693: 3692: 3686: 3683: 3680: 3677: 3673: 3672: 3666: 3663: 3660: 3657: 3653: 3652: 3646: 3643: 3640: 3637: 3633: 3632: 3625: 3622: 3619: 3616: 3612: 3611: 3605: 3602: 3599: 3596: 3592: 3591: 3588: 3585: 3582: 3579: 3575: 3574: 3571: 3568: 3565: 3562: 3555: 3552: 3549: 3548: 3545: 3542: 3539: 3536: 3533: 3529: 3528: 3525: 3522: 3519: 3516: 3513: 3509: 3508: 3505: 3502: 3499: 3496: 3493: 3489: 3488: 3485: 3482: 3479: 3476: 3473: 3469: 3468: 3465: 3462: 3459: 3456: 3453: 3449: 3448: 3445: 3442: 3439: 3436: 3433: 3429: 3428: 3425: 3422: 3419: 3416: 3413: 3409: 3408: 3405: 3402: 3399: 3396: 3393: 3389: 3388: 3385: 3382: 3379: 3376: 3373: 3369: 3368: 3365: 3362: 3359: 3356: 3353: 3349: 3348: 3344: 3341: 3337: 3334: 3331: 3328: 3325: 3313: 3312: 3306: 3299: 3296: 3292: 3291: 3284: 3272: 3269: 3265: 3264: 3258: 3247: 3244: 3240: 3239: 3233: 3227: 3224: 3220: 3219: 3216: 3213: 3210: 3192: 3191:United Kingdom 3189: 3167: 3166: 3163: 3162:Very unhealthy 3160: 3156: 3155: 3152: 3149: 3145: 3144: 3141: 3138: 3134: 3133: 3130: 3127: 3123: 3122: 3119: 3116: 3105: 3102: 3099: 3098: 3095: 3092: 3089: 3086: 3082: 3081: 3078: 3075: 3072: 3069: 3065: 3064: 3061: 3058: 3055: 3052: 3048: 3047: 3044: 3041: 3038: 3035: 3031: 3030: 3027: 3024: 3021: 3018: 3014: 3013: 3010: 3007: 3004: 3001: 2979: 2976: 2973: 2972: 2969: 2967: 2964: 2960: 2959: 2956: 2954: 2951: 2947: 2946: 2943: 2941: 2938: 2934: 2933: 2930: 2928: 2925: 2921: 2920: 2917: 2915: 2912: 2908: 2907: 2904: 2902: 2899: 2895: 2894: 2891: 2888: 2885: 2877: 2876: 2873: 2870: 2867: 2864: 2861: 2858: 2855: 2852: 2848: 2847: 2844: 2841: 2838: 2835: 2832: 2829: 2826: 2823: 2819: 2818: 2815: 2812: 2809: 2806: 2803: 2800: 2797: 2794: 2793:Poor (201-300) 2790: 2789: 2786: 2783: 2780: 2777: 2774: 2771: 2768: 2765: 2761: 2760: 2757: 2754: 2751: 2748: 2745: 2742: 2739: 2736: 2732: 2731: 2728: 2725: 2722: 2719: 2716: 2713: 2710: 2707: 2703: 2702: 2697: 2692: 2689: 2684: 2681: 2676: 2671: 2668: 2663: 2660: 2655: 2652: 2647: 2644: 2634: 2630: 2626: 2622: 2618: 2614: 2547: 2544: 2535: 2531: 2527: 2518: 2517: 2514: 2511: 2508: 2505: 2502: 2498: 2497: 2494: 2491: 2488: 2485: 2482: 2478: 2477: 2474: 2471: 2468: 2465: 2462: 2458: 2457: 2454: 2451: 2448: 2445: 2442: 2438: 2437: 2434: 2431: 2428: 2425: 2422: 2418: 2417: 2413: 2410: 2406: 2403: 2400: 2397: 2393: 2390: 2387: 2386: 2383: 2380: 2367: 2363: 2359: 2355: 2351: 2347: 2343: 2317: 2314: 2308:announced the 2297: 2294: 2291: 2290: 2287: 2283: 2280: 2277: 2273: 2272: 2269: 2266: 2263: 2260: 2256: 2255: 2252: 2249: 2246: 2243: 2239: 2238: 2235: 2232: 2229: 2226: 2222: 2221: 2218: 2215: 2212: 2209: 2205: 2204: 2201: 2198: 2195: 2192: 2188: 2187: 2184: 2181: 2175: 2172: 2155: 2154: 2151: 2149: 2146: 2143: 2140: 2137: 2134: 2131: 2129: 2126: 2122: 2121: 2118: 2116: 2113: 2110: 2107: 2104: 2101: 2098: 2096: 2093: 2089: 2088: 2085: 2082: 2079: 2076: 2073: 2070: 2067: 2064: 2062: 2059: 2055: 2054: 2051: 2048: 2045: 2042: 2039: 2036: 2033: 2030: 2027: 2024: 2020: 2019: 2016: 2013: 2010: 2007: 2004: 2001: 1998: 1995: 1992: 1989: 1985: 1984: 1981: 1978: 1975: 1972: 1969: 1966: 1963: 1960: 1957: 1954: 1950: 1949: 1946: 1943: 1940: 1937: 1934: 1931: 1928: 1925: 1922: 1919: 1915: 1914: 1911: 1908: 1905: 1902: 1899: 1896: 1893: 1890: 1887: 1884: 1880: 1879: 1875: 1872: 1868: 1865: 1861: 1858: 1855: 1852: 1848: 1845: 1841: 1838: 1834: 1831: 1827: 1824: 1820: 1817: 1813: 1812: 1809: 1792: 1791: 1783: 1771: 1763: 1755: 1747: 1744:sulfur dioxide 1731: 1730:Mainland China 1728: 1725: 1724: 1721: 1717: 1716: 1712: 1711: 1707: 1706: 1703: 1699: 1698: 1695: 1691: 1690: 1686: 1685: 1681: 1680: 1677: 1673: 1672: 1668: 1667: 1663: 1662: 1659: 1655: 1654: 1651: 1625: 1622: 1620: 1617: 1614: 1613: 1607: 1601: 1598: 1597:Very High Risk 1594: 1593: 1587: 1581: 1578: 1574: 1573: 1567: 1561: 1558: 1554: 1553: 1547: 1541: 1538: 1534: 1533: 1528: 1523: 1521: 1518: 1517: 1514: 1511: 1500:health risks. 1473:Main article: 1470: 1467: 1464: 1463: 1457: 1454: 1450: 1449: 1443: 1440: 1436: 1435: 1432: 1429: 1425: 1424: 1421: 1418: 1414: 1413: 1410: 1407: 1403: 1402: 1399: 1396: 1392: 1391: 1390:Health advice 1388: 1385: 1371: 1370: 1367: 1363: 1362: 1359: 1356: 1352: 1351: 1348: 1344: 1343: 1340: 1337: 1333: 1332: 1329: 1326: 1322: 1321: 1318: 1314: 1313: 1310: 1306: 1305: 1302: 1299: 1295: 1294: 1291: 1287: 1286: 1283: 1280: 1276: 1275: 1272: 1268: 1267: 1264: 1261: 1257: 1256: 1253: 1250: 1246: 1245: 1242: 1239: 1218: 1215: 1213: 1210: 1194:sulfur dioxide 1175: 1174: 1171: 1168: 1089: 1086: 1055:N95 respirator 1040: 1039: 1037: 1036: 1029: 1022: 1014: 1011: 1010: 1009: 1008: 996: 981: 980: 975: 974: 973: 972: 964: 963: 959: 958: 957: 956: 951: 946: 941: 939:Law by country 936: 928: 927: 921: 920: 915: 910: 905: 900: 895: 890: 885: 879: 876: 875: 872: 871: 868: 867: 866: 865: 860: 850: 844: 841: 840: 837: 836: 833: 832: 827: 822: 817: 812: 810:Surface runoff 807: 802: 797: 792: 787: 782: 777: 772: 767: 762: 757: 752: 747: 742: 737: 732: 727: 722: 717: 712: 710:Eutrophication 707: 702: 697: 691: 686: 685: 682: 681: 678: 677: 672: 667: 665:Scorched earth 662: 661: 660: 658:Nuclear winter 655: 653:Nuclear famine 650: 640: 639: 638: 628: 622: 617: 616: 613: 612: 609: 608: 603: 598: 593: 588: 582: 577: 576: 573: 572: 569: 568: 562: 557: 556: 553: 552: 549: 548: 542: 539: 538: 535: 534: 531: 530: 525: 520: 515: 510: 505: 500: 495: 490: 485: 480: 475: 470: 465: 460: 455: 450: 444: 441: 440: 437: 436: 433: 432: 427: 422: 417: 412: 410:Bioremediation 407: 402: 396: 391: 390: 387: 386: 383: 382: 377: 372: 367: 362: 357: 352: 347: 342: 340:Bioremediation 337: 331: 326: 325: 322: 321: 318: 317: 312: 307: 302: 297: 292: 290:Transportation 286: 281: 280: 277: 276: 273: 272: 267: 262: 257: 251: 248: 247: 244: 243: 240: 239: 237:Radio spectrum 234: 233: 232: 227: 216: 211: 210: 207: 206: 203: 202: 196: 193: 192: 189: 188: 185: 184: 183: 182: 172: 167: 161: 156: 155: 152: 151: 148: 147: 142: 137: 132: 127: 122: 117: 112: 107: 105:Global dimming 102: 97: 92: 87: 82: 77: 72: 66: 61: 60: 57: 56: 53: 45: 44: 36: 35: 15: 13: 10: 9: 6: 4: 3: 2: 8996: 8985: 8982: 8980: 8979:Air pollution 8977: 8975: 8972: 8970: 8967: 8966: 8964: 8949: 8941: 8940: 8937: 8927: 8926:Non-renewable 8923: 8920: 8918: 8915: 8913: 8910: 8908: 8905: 8903: 8900: 8898: 8892: 8890: 8887: 8886: 8884: 8882: 8878: 8872: 8869: 8867: 8866:Urban ecology 8864: 8862: 8859: 8855: 8852: 8851: 8850: 8847: 8845: 8842: 8838: 8835: 8833: 8830: 8829: 8828: 8825: 8821: 8818: 8817: 8816: 8813: 8809: 8806: 8804: 8801: 8800: 8799: 8796: 8794: 8791: 8787: 8784: 8782: 8779: 8778: 8777: 8774: 8770: 8767: 8765: 8762: 8760: 8757: 8755: 8752: 8751: 8750: 8747: 8746: 8743: 8740: 8736: 8724: 8721: 8719: 8716: 8715: 8714: 8711: 8709: 8706: 8704: 8701: 8699: 8698:Privatization 8696: 8694: 8691: 8689: 8686: 8684: 8681: 8679: 8676: 8674: 8671: 8669: 8666: 8664: 8661: 8659: 8656: 8652: 8649: 8648: 8647: 8644: 8642: 8639: 8637: 8634: 8632: 8629: 8627: 8624: 8623: 8621: 8617: 8611: 8608: 8604: 8601: 8600: 8599: 8596: 8594: 8593:Surface water 8591: 8589: 8586: 8582: 8579: 8578: 8577: 8574: 8572: 8569: 8565: 8564: 8560: 8559: 8558: 8555: 8551: 8548: 8546: 8543: 8541: 8538: 8537: 8536: 8533: 8531: 8528: 8524: 8521: 8519: 8516: 8514: 8511: 8510: 8509: 8506: 8504: 8501: 8499: 8496: 8492: 8489: 8488: 8487: 8484: 8483: 8481: 8477: 8474: 8472: 8468: 8460: 8457: 8455: 8452: 8451: 8450: 8447: 8445: 8442: 8440: 8437: 8433: 8430: 8428: 8425: 8423: 8420: 8418: 8415: 8413: 8410: 8408: 8405: 8403: 8400: 8399: 8398: 8395: 8393: 8390: 8388: 8385: 8383: 8380: 8376: 8373: 8372: 8371: 8368: 8364: 8361: 8359: 8356: 8354: 8351: 8349: 8346: 8345: 8344: 8341: 8337: 8334: 8332: 8329: 8327: 8324: 8323: 8322: 8319: 8317: 8314: 8312: 8309: 8307: 8304: 8300: 8297: 8296: 8295: 8292: 8290: 8287: 8286: 8284: 8282: 8278: 8270: 8267: 8265: 8262: 8261: 8260: 8257: 8253: 8250: 8248: 8245: 8243: 8240: 8238: 8235: 8234: 8233: 8230: 8226: 8223: 8219: 8216: 8214: 8211: 8210: 8209: 8206: 8202: 8199: 8197: 8194: 8193: 8192: 8189: 8185: 8182: 8181: 8180: 8177: 8175: 8172: 8170: 8167: 8166: 8165: 8162: 8158: 8155: 8154: 8153: 8150: 8146: 8143: 8142: 8141: 8138: 8134: 8131: 8129: 8126: 8124: 8121: 8119: 8116: 8115: 8114: 8111: 8109: 8106: 8104: 8101: 8095: 8094:peak farmland 8092: 8091: 8090: 8087: 8086: 8085: 8082: 8081: 8079: 8077: 8073: 8067: 8064: 8060: 8057: 8055: 8052: 8051: 8050: 8047: 8045: 8042: 8040: 8037: 8035: 8032: 8029: 8025: 8021: 8017: 8013: 8010: 8008: 8005: 8003: 8000: 7998: 7995: 7994: 7992: 7990: 7986: 7976: 7973: 7971: 7968: 7966: 7963: 7962: 7960: 7956: 7950: 7947: 7943: 7937: 7936: 7935: 7932: 7930: 7927: 7925: 7922: 7920: 7914: 7913: 7911: 7909: 7905: 7902: 7900: 7896: 7892: 7885: 7880: 7878: 7873: 7871: 7866: 7865: 7862: 7852: 7842: 7837: 7832: 7824: 7816: 7807: 7803: 7793: 7787: 7784: 7782: 7779: 7777: 7771: 7769: 7766: 7764: 7761: 7759: 7756: 7755: 7753: 7751: 7747: 7741: 7738: 7736: 7733: 7731: 7728: 7726: 7723: 7721: 7718: 7716: 7713: 7711: 7708: 7706: 7703: 7702: 7700: 7696: 7690: 7687: 7685: 7682: 7680: 7677: 7675: 7672: 7670: 7667: 7665: 7662: 7660: 7657: 7655: 7652: 7651: 7649: 7645: 7639: 7636: 7632: 7629: 7627: 7624: 7623: 7622: 7619: 7618: 7616: 7612: 7606: 7605:Water quality 7603: 7601: 7598: 7596: 7593: 7591: 7588: 7586: 7583: 7581: 7578: 7576: 7573: 7571: 7568: 7564: 7561: 7559: 7556: 7555: 7554: 7551: 7549: 7546: 7544: 7541: 7539: 7536: 7534: 7531: 7529: 7526: 7524: 7521: 7519: 7516: 7514: 7511: 7507: 7504: 7503: 7502: 7499: 7497: 7494: 7492: 7489: 7487: 7484: 7482: 7479: 7477: 7474: 7472: 7469: 7467: 7464: 7462: 7459: 7457: 7454: 7453: 7451: 7449: 7445: 7439: 7436: 7434: 7431: 7429: 7426: 7423: 7419: 7415: 7411: 7408: 7405: 7401: 7398: 7396: 7393: 7392: 7390: 7388: 7384: 7378: 7375: 7373: 7370: 7368: 7367:Traffic signs 7365: 7363: 7360: 7358: 7355: 7354: 7352: 7350: 7346: 7340: 7337: 7336: 7334: 7332: 7328: 7320: 7317: 7315: 7312: 7311: 7310: 7307: 7305: 7302: 7300: 7297: 7293: 7292:Microplastics 7290: 7289: 7288: 7285: 7283: 7282:Nanomaterials 7280: 7276: 7273: 7272: 7271: 7268: 7264: 7261: 7259: 7256: 7254: 7251: 7249: 7246: 7244: 7241: 7239: 7236: 7235: 7234: 7231: 7229: 7226: 7222: 7221:Lead smelting 7219: 7218: 7217: 7214: 7210: 7207: 7205: 7202: 7200: 7197: 7195: 7192: 7190: 7187: 7185: 7182: 7181: 7180: 7177: 7175: 7172: 7170: 7167: 7165: 7162: 7158: 7155: 7154: 7153: 7150: 7148: 7145: 7143: 7140: 7138: 7135: 7134: 7132: 7128: 7122: 7119: 7117: 7114: 7112: 7109: 7107: 7104: 7102: 7099: 7097: 7094: 7090: 7087: 7085: 7082: 7080: 7077: 7076: 7075: 7072: 7071: 7069: 7067: 7063: 7057: 7054: 7052: 7049: 7047: 7044: 7042: 7041:Radioactivity 7039: 7037: 7034: 7032: 7029: 7027: 7024: 7022: 7019: 7017: 7014: 7012: 7009: 7008: 7006: 7004: 7000: 6994: 6993:Noise control 6991: 6988: 6985: 6982: 6978: 6975: 6974: 6973: 6970: 6968: 6965: 6961: 6958: 6956: 6953: 6951: 6948: 6946: 6943: 6940: 6939: 6938: 6935: 6934: 6932: 6930: 6926: 6920: 6917: 6915: 6912: 6910: 6907: 6905: 6902: 6901: 6899: 6895: 6889: 6886: 6882: 6879: 6877: 6874: 6873: 6872: 6869: 6868: 6866: 6864: 6860: 6854: 6851: 6850: 6848: 6844: 6836: 6833: 6832: 6831: 6828: 6826: 6823: 6821: 6818: 6817: 6815: 6813: 6809: 6803: 6800: 6798: 6795: 6791: 6788: 6787: 6786: 6783: 6779: 6776: 6775: 6774: 6771: 6769: 6766: 6764: 6761: 6757: 6754: 6752: 6749: 6747: 6744: 6742: 6741:Metal working 6739: 6737: 6734: 6733: 6732: 6729: 6727: 6724: 6722: 6719: 6717: 6714: 6712: 6709: 6707: 6704: 6702: 6699: 6695: 6692: 6691: 6690: 6687: 6683: 6680: 6679: 6678: 6675: 6673: 6670: 6666: 6663: 6662: 6661: 6658: 6654: 6651: 6649: 6646: 6644: 6641: 6639: 6636: 6635: 6634: 6631: 6629: 6626: 6624: 6621: 6619: 6616: 6614: 6611: 6610: 6608: 6606: 6602: 6598: 6593: 6589: 6582: 6577: 6575: 6570: 6568: 6563: 6562: 6559: 6549: 6545: 6542: 6539: 6537: 6534: 6533: 6532: 6529: 6527: 6523: 6520: 6517: 6515: 6511: 6508: 6506: 6503: 6500: 6497: 6496: 6494: 6489: 6486: 6484: 6481: 6478: 6475: 6473: 6470: 6467: 6464: 6461: 6460: 6458: 6454: 6451: 6449: 6445: 6442: 6439: 6436: 6435: 6433: 6429: 6426: 6425: 6423: 6422: 6421: 6415: 6400: 6394: 6391: 6385: 6382: 6371: 6367: 6361: 6358: 6353: 6349: 6344: 6339: 6335: 6331: 6326: 6321: 6317: 6313: 6309: 6305: 6301: 6294: 6291: 6286: 6282: 6277: 6272: 6268: 6264: 6259: 6254: 6250: 6246: 6242: 6235: 6232: 6221: 6217: 6211: 6208: 6197: 6193: 6187: 6184: 6171: 6167: 6163: 6157: 6154: 6141: 6137: 6131: 6128: 6115: 6109: 6106: 6095: 6091: 6085: 6082: 6068: 6064: 6058: 6055: 6042: 6038: 6032: 6029: 6017: 6011: 6008: 5996: 5990: 5987: 5976:on 2019-02-10 5975: 5971: 5967: 5961: 5958: 5945: 5938: 5932: 5929: 5917: 5910: 5904: 5901: 5890:on 2015-10-06 5886: 5879: 5873: 5870: 5862: 5861: 5854: 5851: 5835: 5834: 5826: 5823: 5812:on 2020-10-26 5808: 5801: 5795: 5792: 5787: 5783: 5779: 5773: 5771: 5767: 5762: 5758: 5754: 5747: 5744: 5731: 5727: 5723: 5717: 5714: 5701: 5697: 5691: 5688: 5677:on 2011-11-25 5676: 5672: 5666: 5663: 5652:on 2013-05-15 5648: 5641: 5635: 5632: 5621:on 2011-10-09 5620: 5616: 5610: 5607: 5595: 5589: 5586: 5574: 5570: 5564: 5561: 5549: 5543: 5540: 5529:on 2014-11-07 5528: 5524: 5518: 5515: 5503: 5497: 5494: 5489: 5485: 5479: 5476: 5471: 5467: 5461: 5458: 5453: 5449: 5443: 5440: 5428: 5424: 5417: 5414: 5409: 5405: 5399: 5396: 5384: 5380: 5374: 5371: 5356: 5349: 5342: 5340: 5338: 5336: 5334: 5330: 5318:. Air quality 5317: 5311: 5309: 5305: 5294:on 2018-08-30 5290: 5286: 5278: 5272: 5270: 5268: 5266: 5262: 5251:on 2017-07-21 5247: 5243: 5235: 5229: 5227: 5223: 5210: 5204: 5201: 5188: 5184: 5177: 5174: 5162: 5156: 5153: 5140: 5134: 5131: 5119: 5113: 5110: 5098: 5094: 5087: 5084: 5071: 5067: 5061: 5059: 5057: 5053: 5042:on 2014-09-03 5038: 5031: 5030: 5022: 5019: 5007:on 2018-06-22 5006: 5002: 4996: 4993: 4980: 4976: 4970: 4967: 4954: 4950: 4946: 4940: 4937: 4925: 4921: 4914: 4911: 4898: 4892: 4889: 4876: 4872: 4866: 4863: 4850: 4846: 4840: 4837: 4826:on 2014-10-18 4825: 4821: 4815: 4812: 4800: 4796: 4790: 4787: 4774: 4770: 4764: 4761: 4755: 4751: 4748: 4746: 4743: 4741: 4738: 4736: 4733: 4731: 4728: 4726: 4723: 4721: 4720:Air pollution 4718: 4717: 4713: 4707: 4702: 4697: 4695: 4691: 4689: 4685: 4676: 4672: 4670: 4662: 4660: 4658: 4645: 4643: 4635: 4628: 4626: 4624: 4601: 4590: 4586: 4569: 4566: 4563: 4560: 4554: 4551: 4548: 4539: 4536: 4533: 4528: 4525: 4522: 4512: 4511: 4510: 4498: 4495: 4492: 4489: 4486: 4483: 4480: 4477: 4474: 4473: 4469: 4466: 4463: 4460: 4457: 4454: 4451: 4448: 4445: 4444: 4440: 4437: 4434: 4431: 4428: 4425: 4422: 4419: 4416: 4415: 4411: 4408: 4405: 4402: 4399: 4396: 4393: 4390: 4387: 4386: 4382: 4379: 4376: 4373: 4370: 4367: 4364: 4361: 4358: 4357: 4353: 4350: 4347: 4344: 4341: 4338: 4335: 4332: 4329: 4328: 4325: 4324: 4320: 4317: 4315: 4312: 4310: 4307: 4305: 4298: 4296: 4290: 4288: 4281: 4279: 4276: 4274: 4270: 4268: 4265: 4263: 4256: 4254: 4251: 4249: 4242: 4240: 4237: 4235: 4228: 4226: 4223: 4221: 4214: 4213: 4210: 4190: 4187: 4184: 4181: 4177: 4154: 4151: 4148: 4145: 4141: 4133: 4116: 4113: 4110: 4106: 4083: 4080: 4077: 4073: 4065: 4050: 4028: 4025: 4022: 4019: 4015: 4007: 3992: 3970: 3967: 3964: 3960: 3952: 3937: 3930: 3915: 3908: 3907: 3906: 3903: 3900: 3885: 3882: 3879: 3875: 3871: 3863: 3860: 3857: 3853: 3849: 3846: 3835: 3832: 3829: 3825: 3821: 3816: 3813: 3810: 3807: 3803: 3795: 3792: 3789: 3785: 3781: 3776: 3773: 3770: 3767: 3763: 3756: 3753: 3745: 3743: 3735: 3733: 3731: 3727: 3723: 3719: 3718:Clean Air Act 3714: 3712: 3699: 3691: 3687: 3684: 3681: 3678: 3675: 3674: 3671: 3667: 3664: 3661: 3658: 3655: 3654: 3651: 3647: 3644: 3641: 3638: 3635: 3634: 3626: 3623: 3620: 3617: 3614: 3613: 3610: 3606: 3603: 3600: 3597: 3594: 3593: 3589: 3586: 3583: 3580: 3577: 3576: 3572: 3569: 3566: 3563: 3560: 3559: 3554:United States 3553: 3546: 3543: 3540: 3537: 3534: 3531: 3530: 3526: 3523: 3520: 3517: 3514: 3511: 3510: 3506: 3503: 3500: 3497: 3494: 3491: 3490: 3486: 3483: 3480: 3477: 3474: 3471: 3470: 3466: 3463: 3460: 3457: 3454: 3451: 3450: 3446: 3443: 3440: 3437: 3434: 3431: 3430: 3426: 3423: 3420: 3417: 3414: 3411: 3410: 3406: 3403: 3400: 3397: 3394: 3391: 3390: 3386: 3383: 3380: 3377: 3374: 3371: 3370: 3366: 3363: 3360: 3357: 3354: 3351: 3350: 3342: 3335: 3332: 3329: 3326: 3323: 3322: 3319: 3310: 3307: 3304: 3300: 3297: 3294: 3293: 3289: 3285: 3282: 3277: 3273: 3270: 3267: 3266: 3262: 3259: 3256: 3252: 3248: 3245: 3242: 3241: 3237: 3234: 3231: 3228: 3225: 3222: 3221: 3217: 3214: 3211: 3208: 3207: 3204: 3202: 3198: 3190: 3188: 3186: 3182: 3178: 3174: 3173:N Seoul Tower 3164: 3161: 3158: 3157: 3153: 3150: 3147: 3146: 3142: 3139: 3136: 3135: 3131: 3128: 3125: 3124: 3120: 3117: 3114: 3113: 3110: 3103: 3096: 3093: 3090: 3087: 3084: 3083: 3079: 3076: 3073: 3070: 3067: 3066: 3062: 3059: 3056: 3053: 3050: 3049: 3045: 3042: 3039: 3036: 3033: 3032: 3028: 3025: 3022: 3019: 3016: 3015: 3011: 3008: 3005: 3002: 2999: 2998: 2995: 2993: 2988: 2984: 2977: 2970: 2968: 2965: 2962: 2961: 2957: 2955: 2952: 2949: 2948: 2944: 2942: 2939: 2936: 2935: 2931: 2929: 2926: 2923: 2922: 2918: 2916: 2913: 2910: 2909: 2905: 2903: 2900: 2897: 2896: 2892: 2889: 2886: 2883: 2882: 2874: 2871: 2868: 2865: 2862: 2859: 2856: 2853: 2850: 2849: 2845: 2842: 2839: 2836: 2833: 2830: 2827: 2824: 2821: 2820: 2816: 2813: 2810: 2807: 2804: 2801: 2798: 2795: 2792: 2791: 2787: 2784: 2781: 2778: 2775: 2772: 2769: 2766: 2763: 2762: 2758: 2755: 2752: 2749: 2746: 2743: 2740: 2737: 2734: 2733: 2729: 2726: 2723: 2720: 2717: 2714: 2711: 2708: 2705: 2704: 2698: 2690: 2682: 2677: 2669: 2661: 2653: 2645: 2642: 2641: 2638: 2612: 2608: 2604: 2600: 2596: 2592: 2587: 2585: 2581: 2577: 2573: 2569: 2564: 2559: 2557: 2553: 2545: 2543: 2541: 2525: 2515: 2512: 2509: 2506: 2503: 2500: 2499: 2495: 2492: 2489: 2486: 2483: 2480: 2479: 2475: 2472: 2469: 2466: 2463: 2460: 2459: 2455: 2452: 2449: 2446: 2443: 2440: 2439: 2435: 2432: 2429: 2426: 2423: 2420: 2419: 2411: 2404: 2398: 2391: 2388: 2381: 2378: 2377: 2374: 2371: 2339: 2336: 2331: 2327: 2323: 2315: 2313: 2311: 2307: 2303: 2295: 2288: 2284: 2281: 2278: 2275: 2274: 2270: 2267: 2264: 2261: 2258: 2257: 2253: 2250: 2247: 2244: 2241: 2240: 2236: 2233: 2230: 2227: 2224: 2223: 2219: 2216: 2213: 2210: 2207: 2206: 2202: 2199: 2196: 2193: 2190: 2189: 2185: 2182: 2177:Air Pollution 2176: 2173: 2170: 2169: 2163: 2162: 2152: 2150: 2147: 2144: 2141: 2138: 2135: 2132: 2130: 2127: 2124: 2123: 2119: 2117: 2114: 2111: 2108: 2105: 2102: 2099: 2097: 2094: 2091: 2090: 2086: 2083: 2080: 2077: 2074: 2071: 2068: 2065: 2063: 2060: 2057: 2056: 2052: 2049: 2046: 2043: 2040: 2037: 2034: 2031: 2028: 2025: 2022: 2021: 2017: 2014: 2011: 2008: 2005: 2002: 1999: 1996: 1993: 1990: 1987: 1986: 1982: 1979: 1976: 1973: 1970: 1967: 1964: 1961: 1958: 1955: 1952: 1951: 1947: 1944: 1941: 1938: 1935: 1932: 1929: 1926: 1923: 1920: 1917: 1916: 1912: 1909: 1906: 1903: 1900: 1897: 1894: 1891: 1888: 1885: 1882: 1881: 1873: 1866: 1859: 1856: 1853: 1846: 1839: 1832: 1825: 1818: 1815: 1814: 1807: 1806: 1800: 1798: 1790:AQI mechanics 1789: 1788: 1787: 1781: 1777: 1769: 1761: 1753: 1745: 1741: 1737: 1729: 1722: 1719: 1718: 1714: 1713: 1709: 1708: 1704: 1700: 1696: 1693: 1692: 1688: 1687: 1683: 1682: 1678: 1674: 1670: 1669: 1665: 1664: 1660: 1656: 1652: 1649: 1648: 1645: 1643: 1639: 1635: 1632:replaced the 1631: 1623: 1618: 1611: 1608: 1605: 1602: 1599: 1596: 1595: 1591: 1588: 1585: 1582: 1579: 1576: 1575: 1571: 1568: 1565: 1562: 1559: 1557:Moderate Risk 1556: 1555: 1551: 1548: 1545: 1542: 1539: 1536: 1535: 1532: 1529: 1527: 1524: 1522: 1520: 1519: 1512: 1509: 1508: 1505: 1501: 1499: 1495: 1491: 1487: 1483: 1476: 1468: 1462: 1458: 1455: 1452: 1451: 1448: 1444: 1441: 1438: 1437: 1433: 1430: 1427: 1426: 1422: 1419: 1416: 1415: 1411: 1408: 1405: 1404: 1400: 1397: 1394: 1393: 1389: 1386: 1383: 1382: 1379: 1376: 1368: 1365: 1364: 1360: 1357: 1353: 1349: 1346: 1345: 1341: 1338: 1334: 1330: 1327: 1324: 1323: 1319: 1316: 1315: 1311: 1308: 1307: 1303: 1300: 1296: 1292: 1289: 1288: 1284: 1281: 1277: 1273: 1270: 1269: 1265: 1262: 1258: 1254: 1251: 1248: 1247: 1243: 1240: 1237: 1236: 1233: 1229: 1226: 1224: 1216: 1211: 1209: 1205: 1203: 1199: 1195: 1191: 1187: 1182: 1180: 1172: 1169: 1166: 1165: 1164: 1158: 1154: 1151:Signboard in 1149: 1145: 1143: 1139: 1135: 1131: 1127: 1122: 1119: 1115: 1111: 1107: 1099: 1094: 1087: 1085: 1083: 1079: 1076:, Malaysia's 1075: 1071: 1066: 1064: 1060: 1056: 1052: 1047: 1035: 1030: 1028: 1023: 1021: 1016: 1015: 1013: 1012: 1007: 997: 995: 990: 985: 984: 983: 982: 971: 968: 967: 966: 965: 960: 955: 952: 950: 947: 945: 942: 940: 937: 935: 932: 931: 930: 929: 924: 919: 916: 914: 911: 909: 906: 904: 901: 899: 896: 894: 891: 889: 886: 884: 881: 880: 874: 873: 864: 861: 859: 856: 855: 854: 851: 849: 846: 845: 839: 838: 831: 828: 826: 825:Water quality 823: 821: 818: 816: 813: 811: 808: 806: 803: 801: 798: 796: 793: 791: 788: 786: 783: 781: 778: 776: 773: 771: 768: 766: 763: 761: 758: 756: 753: 751: 748: 746: 743: 741: 738: 736: 733: 731: 728: 726: 723: 721: 718: 716: 713: 711: 708: 706: 703: 701: 698: 696: 693: 692: 689: 684: 683: 676: 673: 671: 668: 666: 663: 659: 656: 654: 651: 649: 646: 645: 644: 641: 637: 634: 633: 632: 629: 627: 624: 623: 620: 615: 614: 607: 604: 602: 601:Traffic signs 599: 597: 594: 592: 589: 587: 584: 583: 580: 575: 574: 567: 564: 563: 560: 555: 554: 547: 544: 543: 537: 536: 529: 526: 524: 521: 519: 516: 514: 511: 509: 508:Nanomaterials 506: 504: 501: 499: 496: 494: 491: 489: 486: 484: 481: 479: 476: 474: 471: 469: 466: 464: 461: 459: 456: 454: 451: 449: 446: 445: 439: 438: 431: 428: 426: 423: 421: 418: 416: 413: 411: 408: 406: 403: 401: 398: 397: 394: 389: 388: 381: 378: 376: 373: 371: 370:Radioactivity 368: 366: 363: 361: 358: 356: 353: 351: 348: 346: 343: 341: 338: 336: 333: 332: 329: 324: 323: 316: 315:Soundproofing 313: 311: 310:Noise control 308: 306: 305:Noise barrier 303: 301: 298: 296: 293: 291: 288: 287: 284: 279: 278: 271: 268: 266: 263: 261: 258: 256: 253: 252: 246: 245: 238: 235: 231: 228: 226: 223: 222: 221: 218: 217: 214: 209: 208: 201: 198: 197: 191: 190: 181: 178: 177: 176: 173: 171: 168: 166: 163: 162: 159: 154: 153: 146: 143: 141: 138: 136: 133: 131: 128: 126: 123: 121: 118: 116: 113: 111: 108: 106: 103: 101: 98: 96: 93: 91: 88: 86: 83: 81: 78: 76: 73: 71: 68: 67: 64: 59: 58: 51: 47: 46: 43: 37: 33: 29: 28: 21: 8924: / 8798:Exploitation 8683:Conservation 8626:Desalination 8561: 8454:conservation 8289:Biodiversity 8237:conservation 8084:Agricultural 8012:Fossil fuels 7923: 7684:Point source 7626:Heavy metals 7600:Urban runoff 7580:Sulfur water 7558:Septic tanks 7404:Agent Orange 7258:Mining waste 7084:Manure waste 6914:Volcanic ash 6790:Black carbon 6746:Oil refining 6731:Particulates 6660:Construction 6617: 6536:AQI in Hanoi 6513: 6419: 6403:. 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8174:industrial 8152:Management 8128:soundscape 8034:Geothermal 7806:by country 7802:Categories 7740:Zero waste 7621:Pollutants 7575:Stagnation 7513:Monitoring 7481:Freshwater 7357:Air travel 7169:Food waste 7089:Pesticides 7079:Herbicides 6983:Industrial 6812:Biological 6672:Demolition 6665:Renovation 6648:Joss paper 6633:Combustion 6405:2023-07-01 6375:2023-08-04 6225:2023-08-04 6201:2023-08-04 6099:2019-09-19 5980:2019-02-11 5894:2015-10-05 5816:2020-08-20 5706:25 October 5681:2011-11-11 5656:2012-06-15 5625:2011-11-11 5533:2014-10-21 5508:2016-08-16 5488:pib.gov.in 5432:August 20, 5389:2018-02-19 5364:2018-02-18 5298:2018-02-02 5255:2018-02-02 5234:"环境空气质量标准" 5215:9 February 5193:8 February 5167:2011-11-11 5046:2014-09-25 4930:2007-02-11 4830:2014-10-12 4805:2023-08-03 4756:References 4657:Purple Air 4499:Hazardous 4441:Unhealthy 4423:55.5-125.4 3679:Hazardous 3639:Unhealthy 3088:Hazardous 3054:Unhealthy 2890:Color Code 2568:IIT Kanpur 2501:Very high 2197:Excellent 1878:, 24 hour 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700:Biosolids 606:Vandalism 365:Poisoning 360:Plutonium 335:Actinides 328:Radiation 70:Acid rain 41:Pollution 8948:Category 8881:Resource 8820:adaptive 8718:improved 8678:Conflict 8663:Security 8658:Scarcity 8651:improved 8641:Leaching 8518:recharge 8498:Drinking 8449:Wildlife 8316:Bushmeat 8311:Bushfood 8264:planning 8169:gemstone 8164:Minerals 8145:property 8133:viewshed 8123:seascape 8054:sunlight 8028:peak oil 8024:peak gas 7786:Treaties 7758:Diseases 7570:Shipping 7466:Diseases 7314:Landfill 6989:Abstract 6986:Military 6919:Wildfire 6768:Smelting 6736:Asbestos 6544:Archived 6522:Archived 6434:Europe: 6424:Global: 6352:36560038 6285:34504625 6073:9 August 6063:"AirNow" 5751:COMEAP. 5383:Archived 5355:Archived 5322:9 August 5076:8 August 4698:See also 4400:9.5-12.4 4365:9.1-35.4 4323:Category 3676:301-500 3656:201-300 3636:151-200 3615:101-150 3521:888-1064 3243:Moderate 3140:Moderate 3085:301-500 3068:201-300 3051:101-200 2927:Moderate 2846:3.1-3.5 2840:801-1600 2834:209-748* 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