127:
or even meaningless. Criteria can be set in different units (e.g. μg/m, parts per billion by volume (ppbv), parts per billion by mass (ppb (mass)), parts per million (ppm)) and it is possible to convert between all of these units if the molecular mass of the pollutant and the temperature are known. Different standard temperatures are used throughout the world and so it is important to state the temperature of conversion (if relevant). Most pollutants have ambient criteria in the parts per billion (ppb) or μg/m range. Some have smaller units (e.g. dioxins are often in picograms/m); others have larger units (e.g. carbon monoxide (CO) in mg/m). Particle pollution (e.g. PM
114:, or standards, are concentrations of pollutants in the air, and typically refer to outdoor air. The criteria are specified for a variety of reasons including for the protection of human health, buildings, crops, vegetation, ecosystems, as well as for planning and other purposes. There is no internationally accepted definition but usually "standards" have some legal or enforcement aspect, whereas "guidelines" may not be backed by laws. "Criteria/criterion" can be used as a generic term to cover standards and guidelines.
151:
is important when complying with ambient air quality criteria to check the direct reference as well. Not all related caveats/controlling parameters of a criterion can be put in the table, and therefore those specified below are mostly those that most monitoring agencies specify. These agencies also list whether criteria must be monitored in a specific way to fit with compliance measures.
22:
150:
Below is a list of available air quality criteria around the world. There is a lot of cross referencing between organizations (e.g. the
International Finance Corp (IFC)) that have their own criteria but ultimately, many criteria are based on those specified by the World Health Organization (WHO). It
126:
It is important for any numerical standard that averaging period, unit, and statistical measure are given (e.g. the 98th percentile of hourly means measured over a calendar year in micrograms per cubic metre (μg/m)). Without these there is no common ground for a given criterion, making it confusing
117:
Various organisations have proposed criteria e.g. WHO, EU, US EPA. These criteria are often similar – but not always, even if they are proposed for the same purpose (e.g. the protection of human health).
4110:
3940:
Supreme
Council for Environment and Natural Resources, Executive Bye-law for the Environment Protection Law Issued via the Decree Law No. 30 for the Year 2002, Annex 3"
3786:
24/8/1 hourly monitored values, as applicable, shall be complied with 98% of the time, they may exceed the limits but not on two consecutive days of monitoring.
4111:"Resource Management (National Environmental Standards for Air Quality) Regulations 2004 (SR 2004/309) (as at 17 October 2014) – New Zealand Legislation"
32:
4140:
3795:
3783:
Annual arithmetic mean of a minimum of 104 measurements in a year at a particular site, such as taken twice weekly as uniform 24-hour samples.
90:
62:
69:
3869:
Directive 2008/50/EC of the
European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe
76:
47:
58:
4145:
83:
3868:
3856:
Air quality guidelines - global update 2005 www.who.int/phe/health_topics/outdoorair/outdoorair_aqg/en/
4031:
39:
192:
3904:
3219:
911:
4134:
3999:
2108:
1730:
4054:
Japanese
Ministry of Environment, Environmental Quality Standards - Air Quality
21:
135:) is specified in units of mass (e.g. μg/m) and not in units of volume (ppmv).
139:
2751:
Annual 4th highest daily maximum 8-hour concentration, averaged over 3 years
4098:
4055:
138:
In the EU, the pollutants and their criteria are specified in
Directive
2731:
931:
99% of 1-hour daily maximum concentrations, averaged over 3 years
587:
98% of 1-hour daily maximum concentrations, averaged over 3 years
3604:
4097:
India
Central Pollution Control Board - Air Quality Standards
15:
3852:
3850:
3848:
3846:
3844:
3842:
3840:
3838:
3836:
3834:
3832:
3864:
3862:
3830:
3828:
3826:
3824:
3822:
3820:
3818:
3816:
3814:
3812:
3936:
3934:
3932:
3930:
3928:
3926:
3924:
43:
4093:
4091:
4089:
4087:
4085:
4083:
4081:
4079:
4077:
4075:
4073:
4071:
4069:
4067:
4065:
4063:
4032:"Nitrogen dioxide | Ministry for the Environment"
3730:India Central Pollution Control Board (CPCB)
3696:India Central Pollution Control Board (CPCB)
3346:India Central Pollution Control Board (CPCB)
3312:India Central Pollution Control Board (CPCB)
2869:India Central Pollution Control Board (CPCB)
2832:India Central Pollution Control Board (CPCB)
2235:India Central Pollution Control Board (CPCB)
2201:India Central Pollution Control Board (CPCB)
1925:India Central Pollution Control Board (CPCB)
1891:India Central Pollution Control Board (CPCB)
1198:India Central Pollution Control Board (CPCB)
1161:India Central Pollution Control Board (CPCB)
1124:India Central Pollution Control Board (CPCB)
707:India Central Pollution Control Board (CPCB)
631:India Central Pollution Control Board (CPCB)
669:India Central Pollution Control Board(CPCB)
8:
3764:Chinese Ministry of Ecology and Environment
3662:Chinese Ministry of Ecology and Environment
3552:Chinese Ministry of Ecology and Environment
3380:Chinese Ministry of Ecology and Environment
3054:Chinese Ministry of Ecology and Environment
3017:Chinese Ministry of Ecology and Environment
2980:Chinese Ministry of Ecology and Environment
2974:Daily maximum 8-hour averaged concentration
2943:Chinese Ministry of Ecology and Environment
2937:Daily maximum 8-hour averaged concentration
2679:Chinese Ministry of Ecology and Environment
2645:Chinese Ministry of Ecology and Environment
2440:Chinese Ministry of Ecology and Environment
2406:Chinese Ministry of Ecology and Environment
2095:Chinese Ministry of Ecology and Environment
2061:Chinese Ministry of Ecology and Environment
2027:Chinese Ministry of Ecology and Environment
1993:Chinese Ministry of Ecology and Environment
1309:Chinese Ministry of Ecology and Environment
1272:Chinese Ministry of Ecology and Environment
1235:Chinese Ministry of Ecology and Environment
1087:Chinese Ministry of Ecology and Environment
1050:Chinese Ministry of Ecology and Environment
1013:Chinese Ministry of Ecology and Environment
859:Chinese Ministry of Ecology and Environment
556:Chinese Ministry of Ecology and Environment
406:Chinese Ministry of Ecology and Environment
48:introducing citations to additional sources
3565:
3180:
2692:
1694:
872:
153:
3518:New Zealand Ministry for the Environment
3484:New Zealand Ministry for the Environment
3167:New Zealand Ministry for the Environment
1959:New Zealand Ministry for the Environment
1681:New Zealand Ministry for the Environment
1645:New Zealand Ministry for the Environment
1608:New Zealand Ministry for the Environment
783:New Zealand Ministry for the Environment
442:New Zealand Ministry for the Environment
4099:http://cpcb.nic.in/air-quality-standard/
38:Relevant discussion may be found on the
4056:https://www.env.go.jp/en/air/aq/aq.html
3808:
3796:National Ambient Air Quality Objectives
3994:
3992:
3990:
3988:
3986:
3984:
3982:
3980:
3978:
3976:
3974:
3972:
3970:
3968:
3966:
3898:
3896:
1130:India - Ecologically sensitive areas
675:India - Ecologically sensitive areas
7:
4026:
4024:
4022:
4020:
4018:
4016:
4014:
4012:
3964:
3962:
3960:
3958:
3956:
3954:
3952:
3950:
3948:
3946:
3894:
3892:
3890:
3888:
3886:
3884:
3882:
3880:
3878:
3876:
480:Japanese Ministry of Environment
14:
31:relies largely or entirely on a
20:
1393:Calendar Year (1 Jan – 31 Dec)
4141:Pollution in the United States
59:"Ambient air quality criteria"
1:
984:Secondary quoted as 0.5 ppm
112:Ambient air quality criteria
1735:"Coarse Particulate Matter"
4162:
2126:98% averaged over 3 years
1355:Was the guideline in 2000
2468:Annual mean over 3 years
2365:Annual mean over 3 years
2113:"Fine Particulate Matter"
3621:Rolling 3 month average
4115:www.legislation.govt.nz
3060:China Category 2 Areas
3023:China Category 1 Areas
2986:China Category 2 Areas
2949:China Category 1 Areas
2685:China Category 2 Areas
2651:China Category 1 Areas
2446:China Category 2 Areas
2412:China Category 1 Areas
2101:China Category 2 Areas
2067:China Category 1 Areas
2033:China Category 2 Areas
1999:China Category 1 Areas
1315:China Category 2 Areas
1278:China Category 1 Areas
1241:China Category 2 Areas
1093:China Category 1 Areas
1056:China Category 2 Areas
1019:China Category 1 Areas
122:Specifying the criteria
3905:"NAAQS Table | US EPA"
3636:Primary and Secondary
2766:Primary and Secondary
2614:Interim target (IT) 3
2580:Interim target (IT) 2
2340:Interim target (IT) 3
2306:Interim target (IT) 2
2272:Interim target (IT) 1
2141:Primary and Secondary
1763:Primary and Secondary
1462:Interim Target (IT) 2
1425:Interim Target (IT) 1
1387:Interim Target (IT) 2
1349:Interim Target (IT) 1
339:Primary and Secondary
1748:Average over 3 years
474:Daily mean of hourly
3584:Statistical Measure
3199:Statistical Measure
2711:Statistical Measure
1710:Statistical Measure
891:Statistical Measure
172:Statistical Measure
44:improve this article
1527:Any 10 minute mean
1378:Any 24 hour period
1340:Any 24 hour period
489:Quoted as 0.06 ppm
362:Yrly mean of daily
3776:
3775:
3581:Averaging Period
3564:
3563:
3196:Averaging Period
3179:
3178:
2708:Averaging Period
2691:
2690:
1707:Averaging Period
1693:
1692:
1490:Any 24 hour mean
1453:Any 24 hour mean
1416:Any 24 hour mean
888:Averaging Period
871:
870:
835:Nitrogen dioxide
797:Nitrogen dioxide
759:Nitrogen dioxide
751:EU Member States
721:Nitrogen dioxide
683:Nitrogen dioxide
645:Nitrogen dioxide
607:Nitrogen dioxide
569:Nitrogen dioxide
532:Nitrogen dioxide
494:Nitrogen dioxide
456:Nitrogen dioxide
419:Nitrogen dioxide
382:Nitrogen dioxide
344:Nitrogen dioxide
306:Nitrogen dioxide
298:EU Member States
268:Nitrogen dioxide
231:Nitrogen dioxide
169:Averaging Period
109:
108:
94:
4153:
4125:
4124:
4122:
4121:
4107:
4101:
4095:
4058:
4052:
4046:
4045:
4043:
4042:
4028:
4007:
4006:
4004:
3996:
3941:
3938:
3919:
3918:
3916:
3915:
3900:
3871:
3866:
3857:
3854:
3566:
3531:Carbon monoxide
3497:Carbon monoxide
3463:Carbon monoxide
3428:Carbon monoxide
3393:Carbon monoxide
3359:Carbon monoxide
3325:Carbon monoxide
3291:Carbon monoxide
3256:Carbon monoxide
3181:
2900:Any 8 hour mean
2789:Any 8 hour mean
2693:
1695:
1658:Sulphur dioxide
1621:Sulphur dioxide
1584:Sulphur dioxide
1546:Sulphur dioxide
1509:Sulphur dioxide
1472:Sulphur dioxide
1435:Sulphur dioxide
1398:Sulphur dioxide
1360:Sulphur dioxide
1322:Sulphur dioxide
1285:Sulphur dioxide
1248:Sulphur dioxide
1211:Sulphur dioxide
1174:Sulphur dioxide
1137:Sulphur dioxide
1100:Sulphur dioxide
1063:Sulphur dioxide
1026:Sulphur dioxide
989:Sulphur dioxide
951:Sulphur dioxide
873:
193:Nitrogen dioxide
154:
104:
101:
95:
93:
52:
24:
16:
4161:
4160:
4156:
4155:
4154:
4152:
4151:
4150:
4131:
4130:
4129:
4128:
4119:
4117:
4109:
4108:
4104:
4096:
4061:
4053:
4049:
4040:
4038:
4036:www.mfe.govt.nz
4030:
4029:
4010:
4002:
3998:
3997:
3944:
3939:
3922:
3913:
3911:
3902:
3901:
3874:
3867:
3860:
3855:
3810:
3805:
3792:
3781:
3220:Carbon monoxide
3149:
3111:
3073:
3036:
2999:
2962:
2925:
2909:Interim target
2888:
2851:
2814:
2777:
2763:United States*
2739:
2661:
2627:
2593:
2559:
2525:
2491:
2456:
2422:
2388:
2353:
2331:Any 24 hr mean
2319:
2297:Any 24 hr mean
2285:
2263:Any 24 hr mean
2251:
2217:
2183:
2161:Any 24 hr mean
2149:
2112:
2077:
2043:
2009:
1975:
1941:
1907:
1873:
1839:
1805:
1771:
1734:
1664:
1627:
1590:
1552:
1515:
1478:
1441:
1404:
1366:
1328:
1291:
1254:
1217:
1180:
1143:
1106:
1069:
1032:
995:
957:
943:United States*
919:
912:Sulphur dioxide
841:
803:
765:
727:
689:
651:
613:
575:
538:
500:
462:
425:
388:
350:
312:
274:
237:
200:
148:
134:
130:
124:
105:
99:
96:
53:
51:
37:
25:
12:
11:
5:
4159:
4157:
4149:
4148:
4143:
4133:
4132:
4127:
4126:
4102:
4059:
4047:
4008:
4000:"GB 3095-2012"
3942:
3920:
3903:EPA, OAR, US.
3872:
3858:
3807:
3806:
3804:
3801:
3800:
3799:
3791:
3788:
3780:
3777:
3774:
3773:
3771:
3768:
3765:
3762:
3759:
3756:
3753:
3750:
3747:
3744:
3740:
3739:
3737:
3734:
3731:
3728:
3725:
3722:
3719:
3716:
3713:
3710:
3706:
3705:
3703:
3700:
3697:
3694:
3691:
3688:
3685:
3682:
3679:
3676:
3672:
3671:
3669:
3666:
3663:
3660:
3657:
3654:
3651:
3648:
3645:
3642:
3638:
3637:
3634:
3633:United States
3631:
3628:
3625:
3622:
3619:
3616:
3613:
3610:
3607:
3601:
3600:
3597:
3596:Applicability
3594:
3591:
3588:
3587:# exceedences
3585:
3582:
3579:
3576:
3573:
3570:
3562:
3561:
3559:
3556:
3553:
3550:
3547:
3544:
3541:
3538:
3535:
3532:
3528:
3527:
3525:
3522:
3519:
3516:
3513:
3510:
3507:
3504:
3501:
3498:
3494:
3493:
3491:
3488:
3485:
3482:
3479:
3476:
3473:
3470:
3467:
3464:
3460:
3459:
3458:Calendar Year
3456:
3453:
3450:
3447:
3444:
3441:
3438:
3435:
3432:
3429:
3425:
3424:
3421:
3420:United States
3418:
3415:
3412:
3409:
3406:
3403:
3400:
3397:
3394:
3390:
3389:
3387:
3384:
3381:
3378:
3375:
3372:
3369:
3366:
3363:
3360:
3356:
3355:
3353:
3350:
3347:
3344:
3341:
3338:
3335:
3332:
3329:
3326:
3322:
3321:
3319:
3316:
3313:
3310:
3307:
3304:
3301:
3298:
3295:
3292:
3288:
3287:
3286:Calendar Year
3284:
3281:
3278:
3275:
3272:
3269:
3266:
3263:
3260:
3257:
3253:
3252:
3249:
3248:United States
3246:
3243:
3240:
3237:
3234:
3231:
3228:
3225:
3222:
3216:
3215:
3212:
3211:Applicability
3209:
3206:
3203:
3202:# exceedences
3200:
3197:
3194:
3191:
3188:
3185:
3177:
3176:
3174:
3171:
3168:
3165:
3162:
3159:
3156:
3153:
3150:
3147:
3144:
3140:
3139:
3138:Calendar Year
3136:
3133:
3130:
3127:
3124:
3121:
3118:
3115:
3112:
3109:
3106:
3102:
3101:
3100:Calendar Year
3098:
3095:
3092:
3089:
3086:
3083:
3080:
3077:
3074:
3071:
3068:
3064:
3063:
3061:
3058:
3055:
3052:
3049:
3046:
3043:
3040:
3037:
3034:
3031:
3027:
3026:
3024:
3021:
3018:
3015:
3012:
3009:
3006:
3003:
3000:
2997:
2994:
2990:
2989:
2987:
2984:
2981:
2978:
2975:
2972:
2969:
2966:
2963:
2960:
2957:
2953:
2952:
2950:
2947:
2944:
2941:
2938:
2935:
2932:
2929:
2926:
2923:
2920:
2916:
2915:
2913:
2910:
2907:
2904:
2901:
2898:
2895:
2892:
2889:
2886:
2883:
2879:
2878:
2876:
2873:
2870:
2867:
2864:
2861:
2858:
2855:
2852:
2849:
2846:
2842:
2841:
2839:
2836:
2833:
2830:
2827:
2824:
2821:
2818:
2815:
2812:
2809:
2805:
2804:
2802:
2799:
2796:
2793:
2790:
2787:
2784:
2781:
2778:
2775:
2772:
2768:
2767:
2764:
2761:
2758:
2755:
2752:
2749:
2746:
2743:
2740:
2737:
2734:
2728:
2727:
2724:
2723:Applicability
2721:
2718:
2715:
2714:# exceedences
2712:
2709:
2706:
2703:
2700:
2697:
2689:
2688:
2686:
2683:
2680:
2677:
2674:
2671:
2668:
2665:
2662:
2659:
2655:
2654:
2652:
2649:
2646:
2643:
2640:
2637:
2634:
2631:
2628:
2625:
2621:
2620:
2618:
2615:
2612:
2609:
2606:
2603:
2600:
2597:
2594:
2591:
2587:
2586:
2584:
2581:
2578:
2575:
2572:
2569:
2566:
2563:
2560:
2557:
2553:
2552:
2550:
2547:
2544:
2541:
2538:
2535:
2532:
2529:
2526:
2523:
2519:
2518:
2516:
2513:
2510:
2507:
2504:
2501:
2498:
2495:
2492:
2489:
2485:
2484:
2481:
2480:United States
2478:
2475:
2472:
2469:
2466:
2463:
2460:
2457:
2454:
2450:
2449:
2447:
2444:
2441:
2438:
2435:
2432:
2429:
2426:
2423:
2420:
2416:
2415:
2413:
2410:
2407:
2404:
2401:
2398:
2395:
2392:
2389:
2386:
2382:
2381:
2378:
2377:United States
2375:
2372:
2369:
2366:
2363:
2360:
2357:
2354:
2351:
2347:
2346:
2344:
2341:
2338:
2335:
2332:
2329:
2326:
2323:
2320:
2317:
2313:
2312:
2310:
2307:
2304:
2301:
2298:
2295:
2292:
2289:
2286:
2283:
2279:
2278:
2276:
2273:
2270:
2267:
2264:
2261:
2258:
2255:
2252:
2249:
2245:
2244:
2242:
2239:
2236:
2233:
2230:
2227:
2224:
2221:
2218:
2215:
2211:
2210:
2208:
2205:
2202:
2199:
2196:
2193:
2190:
2187:
2184:
2181:
2177:
2176:
2174:
2171:
2168:
2165:
2162:
2159:
2156:
2153:
2150:
2147:
2143:
2142:
2139:
2138:United States
2136:
2133:
2130:
2127:
2124:
2121:
2118:
2115:
2110:
2105:
2104:
2102:
2099:
2096:
2093:
2090:
2087:
2084:
2081:
2078:
2075:
2071:
2070:
2068:
2065:
2062:
2059:
2056:
2053:
2050:
2047:
2044:
2041:
2037:
2036:
2034:
2031:
2028:
2025:
2022:
2019:
2016:
2013:
2010:
2007:
2003:
2002:
2000:
1997:
1994:
1991:
1988:
1985:
1982:
1979:
1976:
1973:
1969:
1968:
1966:
1963:
1960:
1957:
1954:
1951:
1948:
1945:
1942:
1939:
1935:
1934:
1932:
1929:
1926:
1923:
1920:
1917:
1914:
1911:
1908:
1905:
1901:
1900:
1898:
1895:
1892:
1889:
1886:
1883:
1880:
1877:
1874:
1871:
1867:
1866:
1864:
1861:
1858:
1855:
1852:
1849:
1846:
1843:
1840:
1837:
1833:
1832:
1830:
1827:
1824:
1821:
1818:
1815:
1812:
1809:
1806:
1803:
1799:
1798:
1796:
1793:
1790:
1787:
1784:
1781:
1778:
1775:
1772:
1769:
1765:
1764:
1761:
1760:United States
1758:
1755:
1752:
1751:Once per year
1749:
1746:
1743:
1740:
1737:
1732:
1727:
1726:
1723:
1722:Applicability
1720:
1717:
1714:
1713:# exceedences
1711:
1708:
1705:
1702:
1699:
1691:
1690:
1688:
1685:
1682:
1679:
1677:
1674:
1671:
1668:
1665:
1662:
1659:
1655:
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1652:
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1634:
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1628:
1625:
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1618:
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1612:
1609:
1606:
1603:
1600:
1597:
1594:
1591:
1588:
1585:
1581:
1580:
1579:Calendar Year
1577:
1574:
1571:
1568:
1565:
1562:
1559:
1556:
1553:
1550:
1547:
1543:
1542:
1540:
1537:
1534:
1531:
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1525:
1522:
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1497:
1494:
1491:
1488:
1485:
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1479:
1476:
1473:
1469:
1468:
1466:
1463:
1460:
1457:
1454:
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1432:
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1426:
1423:
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1417:
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1402:
1399:
1395:
1394:
1391:
1388:
1385:
1382:
1379:
1376:
1373:
1370:
1367:
1364:
1361:
1357:
1356:
1353:
1350:
1347:
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1332:
1329:
1326:
1323:
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1301:
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1279:
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1273:
1270:
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1264:
1261:
1258:
1255:
1252:
1249:
1245:
1244:
1242:
1239:
1236:
1233:
1230:
1227:
1224:
1221:
1218:
1215:
1212:
1208:
1207:
1205:
1202:
1199:
1196:
1193:
1190:
1187:
1184:
1181:
1178:
1175:
1171:
1170:
1168:
1165:
1162:
1159:
1156:
1153:
1150:
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1141:
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1134:
1133:
1131:
1128:
1125:
1122:
1119:
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1113:
1110:
1107:
1104:
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1097:
1096:
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1088:
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1082:
1079:
1076:
1073:
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1064:
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1051:
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1045:
1042:
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1036:
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1030:
1027:
1023:
1022:
1020:
1017:
1014:
1011:
1008:
1005:
1002:
999:
996:
993:
990:
986:
985:
982:
981:United States
979:
976:
973:
972:Once per year
970:
967:
964:
961:
958:
955:
952:
948:
947:
944:
941:
938:
935:
932:
929:
926:
923:
920:
917:
914:
908:
907:
904:
903:Applicability
901:
898:
895:
894:# exceedences
892:
889:
886:
883:
880:
877:
869:
868:
866:
863:
860:
857:
854:
851:
848:
845:
842:
839:
836:
832:
831:
830:Calendar Year
828:
825:
822:
819:
816:
813:
810:
807:
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798:
794:
793:
792:Calendar Year
790:
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772:
769:
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754:Calendar Year
752:
749:
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731:
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722:
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716:Calendar Year
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711:
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676:
673:
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664:
661:
658:
655:
652:
649:
646:
642:
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640:Calendar Year
638:
635:
632:
629:
626:
623:
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617:
614:
611:
608:
604:
603:
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599:United States
597:
594:
591:
588:
585:
582:
579:
576:
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570:
566:
565:
563:
560:
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527:Calendar Year
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501:
498:
495:
491:
490:
487:
484:
481:
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451:Calendar Year
449:
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435:
432:
429:
426:
423:
420:
416:
415:
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410:
407:
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389:
386:
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379:
378:
377:Calendar Year
375:
372:
369:
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363:
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345:
341:
340:
337:
336:United States
334:
331:
328:
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316:
313:
310:
307:
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302:
301:Calendar Year
299:
296:
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265:
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259:
256:
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228:
227:
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219:
216:
213:
210:
207:
204:
201:
198:
195:
189:
188:
185:
184:Applicability
182:
179:
176:
175:# exceedences
173:
170:
167:
164:
161:
158:
147:
144:
132:
128:
123:
120:
107:
106:
42:. Please help
28:
26:
19:
13:
10:
9:
6:
4:
3:
2:
4158:
4147:
4146:Air pollution
4144:
4142:
4139:
4138:
4136:
4116:
4112:
4106:
4103:
4100:
4094:
4092:
4090:
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3598:
3595:
3592:
3590:Organisation
3589:
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3577:
3574:
3571:
3568:
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3560:
3557:
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3333:
3330:
3327:
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3320:
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3311:
3308:
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3302:
3299:
3296:
3293:
3290:
3289:
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3282:
3279:
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3267:
3264:
3261:
3258:
3255:
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3250:
3247:
3244:
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3238:
3235:
3232:
3229:
3226:
3223:
3221:
3218:
3217:
3213:
3210:
3207:
3205:Organisation
3204:
3201:
3198:
3195:
3192:
3189:
3186:
3183:
3182:
3175:
3172:
3169:
3166:
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3019:
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3007:
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2884:
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2810:
2807:
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2803:
2800:
2797:
2794:
2791:
2788:
2785:
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2779:
2773:
2770:
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2762:
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2753:
2750:
2747:
2744:
2741:
2735:
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2730:
2729:
2725:
2722:
2719:
2717:Organisation
2716:
2713:
2710:
2707:
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2701:
2698:
2695:
2694:
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2327:
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2299:
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2277:
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2259:
2256:
2253:
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2243:
2240:
2237:
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2228:
2225:
2222:
2219:
2213:
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2209:
2206:
2203:
2200:
2197:
2194:
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2179:
2178:
2175:
2172:
2169:
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2163:
2160:
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2125:
2122:
2119:
2116:
2114:
2107:
2106:
2103:
2100:
2097:
2094:
2091:
2088:
2085:
2082:
2079:
2073:
2072:
2069:
2066:
2063:
2060:
2057:
2054:
2051:
2048:
2045:
2039:
2038:
2035:
2032:
2029:
2026:
2023:
2020:
2017:
2014:
2011:
2005:
2004:
2001:
1998:
1995:
1992:
1989:
1986:
1983:
1980:
1977:
1971:
1970:
1967:
1964:
1961:
1958:
1955:
1952:
1949:
1946:
1943:
1937:
1936:
1933:
1930:
1927:
1924:
1921:
1918:
1915:
1912:
1909:
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1753:
1750:
1747:
1744:
1741:
1738:
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1729:
1728:
1724:
1721:
1718:
1716:Organisation
1715:
1712:
1709:
1706:
1703:
1700:
1697:
1696:
1689:
1686:
1683:
1680:
1678:
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1598:
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1544:
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1529:
1526:
1523:
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1517:
1511:
1508:
1507:
1504:
1501:
1498:
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1474:
1471:
1470:
1467:
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1437:
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1409:
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1397:
1396:
1392:
1389:
1386:
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1377:
1374:
1371:
1368:
1362:
1359:
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1354:
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1333:
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1324:
1321:
1320:
1317:
1314:
1311:
1308:
1305:
1302:
1299:
1296:
1293:
1287:
1284:
1283:
1280:
1277:
1274:
1271:
1268:
1265:
1262:
1259:
1256:
1250:
1247:
1246:
1243:
1240:
1237:
1234:
1231:
1228:
1225:
1222:
1219:
1213:
1210:
1209:
1206:
1203:
1200:
1197:
1194:
1191:
1188:
1185:
1182:
1176:
1173:
1172:
1169:
1166:
1163:
1160:
1157:
1154:
1151:
1148:
1145:
1139:
1136:
1135:
1132:
1129:
1126:
1123:
1120:
1117:
1114:
1111:
1108:
1102:
1099:
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1089:
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1080:
1077:
1074:
1071:
1065:
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1055:
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1021:
1018:
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1000:
997:
991:
988:
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983:
980:
977:
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968:
965:
962:
959:
953:
950:
949:
945:
942:
939:
936:
933:
930:
927:
924:
921:
915:
913:
910:
909:
905:
902:
899:
897:Organisation
896:
893:
890:
887:
884:
881:
878:
875:
874:
867:
864:
861:
858:
855:
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178:Organisation
177:
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71:
68:
64:
61: –
60:
56:
55:Find sources:
49:
45:
41:
35:
34:
33:single source
29:This article
27:
23:
18:
17:
4118:. Retrieved
4114:
4105:
4050:
4039:. Retrieved
4035:
3912:. Retrieved
3908:
3785:
3782:
3524:New Zealand
3490:New Zealand
3173:New Zealand
1965:New Zealand
1687:New Zealand
1651:New Zealand
1614:New Zealand
789:New Zealand
748:Limit value
448:New Zealand
295:Limit Value
149:
146:The criteria
137:
125:
116:
111:
110:
100:January 2015
97:
87:
80:
73:
66:
54:
30:
1570:Ras Laffan
4135:Categories
4120:2017-04-05
4041:2017-04-05
3914:2018-11-05
3803:References
3798:for Canada
3569:Pollutant
3184:Pollutant
3126:2x8hrs/yr
2835:Guideline
2798:Guideline
2696:Pollutant
2546:Guideline
2512:Guideline
2483:Secondary
2170:Guideline
1860:Guideline
1826:Guideline
1792:Guideline
1786:3 days/yr
1783:99th %ile
1684:Guideline
1567:1 hr/year
1564:99.99%ile
1536:Guideline
1524:10 minute
1499:Guideline
876:Pollutant
818:26 hrs/yr
742:18 hrs/yr
739:99.79%ile
445:Guideline
258:Guideline
221:Guideline
157:Pollutant
140:2008/50/EC
70:newspapers
3779:Footnotes
3721:24 hours
3088:8 hrs/yr
815:99.7%ile
515:1 day/yr
512:99.7%ile
40:talk page
3790:See also
3618:3 month
3543:24 hour
3443:Maximum
3423:Primary
3340:Maximum
3306:Maximum
3271:Maximum
3251:Primary
3120:8 hours
2971:8 hours
2934:8 hours
2897:8 hours
2823:8 hours
2786:8 hours
2748:8 hours
2670:24 hour
2636:24 hour
2534:24 hour
2380:Primary
2328:24 hour
2294:24 hour
2260:24 hour
2192:24 hour
2158:24 hour
2123:24 hour
2086:24 hour
2052:24 hour
1950:24 hour
1916:24 hour
1814:24 hour
1780:24 hour
1745:24 hour
1676:Average
1673:24 hour
1487:24 hour
1450:24 hour
1413:24 hour
1375:24 hour
1337:24 hour
1189:24 hour
966:3 hours
946:Primary
698:24 hour
602:Primary
3755:Season
3687:Annual
3653:Annual
3627:US EPA
3593:Status
3509:1 hour
3475:8 hour
3449:SCENR
3440:8 hour
3414:US EPA
3405:8 hour
3371:1 hour
3337:8 hour
3303:1 hour
3277:SCENR
3268:1 hour
3242:US EPA
3233:1 hour
3208:Status
3158:1 hour
3129:SCENR
3091:SCENR
3082:1 hour
3045:1 hour
3008:1 hour
2912:Global
2860:1 hour
2801:Global
2757:US EPA
2720:Status
2617:Global
2602:Annual
2583:Global
2568:Annual
2549:Global
2515:Global
2500:Annual
2474:US EPA
2465:Annual
2431:Annual
2397:Annual
2371:US EPA
2362:Annual
2343:Global
2309:Global
2275:Global
2241:Global
2226:Annual
2173:Global
2132:US EPA
2018:Annual
1984:Annual
1882:Annual
1863:Global
1848:Annual
1829:Global
1795:Global
1754:US EPA
1719:Status
1636:1 hour
1599:1 hour
1561:1 hour
1539:Global
1502:Global
1465:Global
1428:Global
1390:Global
1352:Global
1300:1 hour
1263:1 hour
1152:Annual
1115:Annual
1041:Annual
1004:Annual
975:US EPA
937:US EPA
928:1 hour
900:Status
850:1 hour
821:SCENR
812:1 hour
774:1 hour
736:1 hour
660:Annual
622:Annual
593:US EPA
584:1 hour
518:SCENR
397:Annual
368:SCENR
359:Annual
330:US EPA
321:Annual
283:Annual
261:Global
246:1 hour
224:Global
209:Annual
181:Status
84:scholar
3909:US EPA
3770:China
3767:Legal
3736:India
3733:Legal
3702:India
3699:Legal
3668:China
3665:Legal
3630:Legal
3599:Notes
3578:Units
3575:Value
3572:Abbr.
3558:China
3555:Legal
3521:Legal
3487:Legal
3455:Qatar
3452:Legal
3417:Legal
3386:China
3383:Legal
3352:India
3349:Legal
3318:India
3315:Legal
3283:Qatar
3280:Legal
3245:Legal
3214:Notes
3193:Units
3190:Value
3187:Abbr.
3170:Legal
3143:Ozone
3135:Qatar
3132:Legal
3123:99.8%
3105:Ozone
3097:Qatar
3094:Legal
3085:99.9%
3067:Ozone
3057:Legal
3030:Ozone
3020:Legal
2993:Ozone
2983:Legal
2956:Ozone
2946:Legal
2919:Ozone
2882:Ozone
2875:India
2872:Legal
2845:Ozone
2838:India
2808:Ozone
2771:Ozone
2760:Legal
2726:Notes
2705:Units
2702:Value
2699:Abbr.
2682:Legal
2648:Legal
2477:Legal
2443:Legal
2409:Legal
2374:Legal
2238:Legal
2207:India
2204:Legal
2135:Legal
2098:Legal
2064:Legal
2030:Legal
1996:Legal
1962:Legal
1931:India
1928:Legal
1897:India
1894:Legal
1757:Legal
1725:Notes
1704:Units
1701:Value
1698:Abbr.
1648:Legal
1611:Legal
1576:Qatar
1573:Legal
1312:Legal
1275:Legal
1238:Legal
1226:Daily
1204:India
1201:Legal
1167:India
1164:Legal
1127:Legal
1090:Legal
1078:Daily
1053:Legal
1016:Legal
978:Legal
940:Legal
906:Notes
885:Units
882:Value
879:Abbr.
865:China
862:Legal
827:Qatar
824:Legal
786:Legal
713:India
710:Legal
672:Legal
637:India
634:Legal
596:Legal
562:China
559:Legal
547:Daily
524:Qatar
521:Legal
509:Daily
486:Japan
483:Legal
471:Daily
434:Daily
412:China
409:Legal
374:Qatar
371:Legal
333:Legal
187:Notes
166:Units
163:Value
160:Abbr.
86:
79:
72:
65:
57:
4003:(PDF)
3761:None
3758:Mean
3752:μg/m
3743:Lead
3727:None
3724:Mean
3718:μg/m
3709:Lead
3693:None
3690:Mean
3684:μg/m
3675:Lead
3659:None
3656:Mean
3650:μg/m
3641:Lead
3624:None
3615:μg/m
3612:0.15
3549:None
3546:Mean
3540:mg/m
3515:1/yr
3512:Mean
3506:mg/m
3481:1/yr
3478:Mean
3472:mg/m
3446:None
3437:mg/m
3411:1/yr
3408:Mean
3377:None
3374:Mean
3368:mg/m
3343:None
3334:mg/m
3309:None
3300:mg/m
3274:None
3265:mg/m
3239:1/yr
3236:Mean
3164:None
3161:Mean
3155:μg/m
3117:μg/m
3079:μg/m
3051:None
3048:Mean
3042:μg/m
3014:None
3011:Mean
3005:μg/m
2977:None
2968:μg/m
2940:None
2931:μg/m
2906:WHO
2903:None
2894:μg/m
2866:None
2863:Mean
2857:μg/m
2829:None
2826:Mean
2820:μg/m
2795:WHO
2792:None
2783:μg/m
2754:3/yr
2742:0.07
2732:Ozone
2676:None
2673:Mean
2667:μg/m
2642:None
2639:Mean
2633:μg/m
2611:WHO
2608:None
2605:Mean
2599:μg/m
2577:WHO
2574:None
2571:Mean
2565:μg/m
2543:WHO
2540:None
2537:Mean
2531:μg/m
2509:WHO
2506:None
2503:Mean
2497:μg/m
2471:None
2462:μg/m
2459:15.0
2437:None
2434:Mean
2428:μg/m
2403:None
2400:Mean
2394:μg/m
2368:None
2359:μg/m
2356:12.0
2337:WHO
2334:None
2325:μg/m
2322:37.5
2303:WHO
2300:None
2291:μg/m
2269:WHO
2266:None
2257:μg/m
2232:None
2229:Mean
2223:μg/m
2198:None
2195:mean
2189:μg/m
2167:WHO
2164:None
2155:μg/m
2129:None
2120:μg/m
2092:None
2089:Mean
2083:μg/m
2058:None
2055:Mean
2049:μg/m
2024:None
2021:Mean
2015:μg/m
1990:None
1987:Mean
1981:μg/m
1956:1/yr
1953:Mean
1947:μg/m
1922:None
1919:Mean
1913:μg/m
1888:None
1885:Mean
1879:μg/m
1857:WHO
1854:None
1851:Mean
1845:μg/m
1823:WHO
1820:None
1817:Mean
1811:μg/m
1789:WHO
1777:μg/m
1742:μg/m
1670:μg/m
1642:None
1639:Mean
1633:μg/m
1605:9/yr
1602:Mean
1596:μg/m
1558:μg/m
1555:1300
1533:WHO
1530:None
1521:μg/m
1496:WHO
1493:None
1484:μg/m
1459:WHO
1456:None
1447:μg/m
1422:WHO
1419:None
1410:μg/m
1384:WHO
1381:None
1372:μg/m
1346:WHO
1343:None
1334:μg/m
1306:None
1303:Mean
1297:μg/m
1269:None
1266:Mean
1260:μg/m
1232:None
1229:Mean
1223:μg/m
1195:None
1192:Mean
1186:μg/m
1158:None
1155:Mean
1149:μg/m
1121:None
1118:Mean
1112:μg/m
1084:None
1081:Mean
1075:μg/m
1047:None
1044:Mean
1038:μg/m
1010:None
1007:Mean
1001:μg/m
969:Mean
934:None
856:None
853:Mean
847:μg/m
809:μg/m
780:9/yr
777:Mean
771:μg/m
733:μg/m
704:None
701:Mean
695:μg/m
666:None
663:Mean
657:μg/m
628:None
625:Mean
619:μg/m
590:None
553:None
550:Mean
544:μg/m
506:μg/m
477:None
468:μg/m
437:Mean
431:μg/m
403:None
400:Mean
394:μg/m
365:None
356:μg/m
327:None
324:Mean
289:None
286:Mean
280:μg/m
255:WHO
252:None
249:Mean
243:μg/m
218:WHO
215:None
212:Mean
206:μg/m
91:JSTOR
77:books
3681:0.5
3647:0.5
3605:Lead
3402:ppm
3230:ppm
3152:150
3114:120
3076:235
3039:200
3002:160
2965:160
2928:100
2891:160
2854:180
2817:100
2780:100
2745:ppm
2080:150
1774:125
1739:150
1667:120
1630:570
1593:350
1518:500
1407:125
1331:125
1294:500
1257:150
1220:150
963:ppb
960:500
925:ppb
844:200
806:400
768:200
745:EU
730:200
581:ppb
578:100
503:150
465:113
428:100
353:100
318:ppb
292:EU
240:200
131:, PM
63:news
3746:Pb
3712:Pb
3678:Pb
3644:Pb
3609:Pb
3534:CO
3503:30
3500:CO
3469:10
3466:CO
3434:10
3431:CO
3396:CO
3365:10
3362:CO
3328:CO
3294:CO
3262:40
3259:CO
3227:35
3224:CO
2664:75
2660:2.5
2630:35
2626:2.5
2596:15
2592:2.5
2562:25
2558:2.5
2528:25
2524:2.5
2494:10
2490:2.5
2455:2.5
2425:35
2421:2.5
2391:15
2387:2.5
2352:2.5
2318:2.5
2288:50
2284:2.5
2254:75
2250:2.5
2220:40
2216:2.5
2186:60
2182:2.5
2152:25
2148:2.5
2117:35
2111:2.5
2046:50
2012:70
1978:40
1944:50
1910:10
1876:60
1842:20
1808:50
1481:20
1444:50
1369:50
1183:80
1146:50
1109:20
1072:50
1035:60
998:20
922:75
692:80
654:30
616:40
541:80
391:40
315:53
277:40
203:40
133:1.0
46:by
4137::
4113:.
4062:^
4034:.
4011:^
3945:^
3923:^
3907:.
3875:^
3861:^
3811:^
3749:1
3715:1
3537:4
3399:9
3331:2
3297:4
2658:PM
2624:PM
2590:PM
2556:PM
2522:PM
2488:PM
2453:PM
2419:PM
2385:PM
2350:PM
2316:PM
2282:PM
2248:PM
2214:PM
2180:PM
2146:PM
2109:PM
2076:10
2074:PM
2042:10
2040:PM
2008:10
2006:PM
1974:10
1972:PM
1940:10
1938:PM
1906:10
1904:PM
1872:10
1870:PM
1838:10
1836:PM
1804:10
1802:PM
1770:10
1768:PM
1733:10
1731:PM
1661:SO
1624:SO
1587:SO
1549:SO
1512:SO
1475:SO
1438:SO
1401:SO
1363:SO
1325:SO
1288:SO
1251:SO
1214:SO
1177:SO
1140:SO
1103:SO
1066:SO
1029:SO
992:SO
954:SO
916:SO
838:NO
800:NO
762:NO
724:NO
686:NO
648:NO
610:NO
572:NO
535:NO
497:NO
459:NO
422:NO
385:NO
347:NO
309:NO
271:NO
234:NO
197:NO
142:.
129:10
4123:.
4044:.
4005:.
3917:.
3148:3
3146:O
3110:3
3108:O
3072:3
3070:O
3035:3
3033:O
2998:3
2996:O
2961:3
2959:O
2924:3
2922:O
2887:3
2885:O
2850:3
2848:O
2813:3
2811:O
2776:3
2774:O
2738:3
2736:O
1663:2
1626:2
1589:2
1551:2
1514:2
1477:2
1440:2
1403:2
1365:2
1327:2
1290:2
1253:2
1216:2
1179:2
1142:2
1105:2
1068:2
1031:2
994:2
956:2
918:2
840:2
802:2
764:2
726:2
688:2
650:2
612:2
574:2
537:2
499:2
461:2
424:2
387:2
349:2
311:2
273:2
236:2
199:2
102:)
98:(
88:·
81:·
74:·
67:·
50:.
36:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
