516 cities by checked peak, last 7 days

Every city with enough measurements in this window, worst first.

CPCB in India: no readings since 12 Oct (488 monitors). EEA in Spain: no readings since 13 Oct (310 monitors). Their cities show older figures or are missing from this board, not clean.

Ranked by checked peak: each city's worst 6 hours in a row, read by at least 2 monitoring places 3 km or more apart (the second-highest place's average over those hours), so one faulty monitor or smoke over one corner of a city can't set it. 516 of these 2,895 cities are ranked: those measured at 2 or more such places on enough of the days.

=101NeiliTaiwan, Taiwan 93
=101PoznańGreater Poland, Poland 93
103BangkokBangkok, Thailand 92
104SintansinDaejeon, South Korea 92
105SantiagoSantiago Metropolitan, Chile 92
=106JeonjuJeollabuk-do, South Korea 91
=106Lak SiBangkok, Thailand 91
108Bang PakongChachoengsao, Thailand 91
109GentFlanders, Belgium 91
110BelgradeCentral Serbia, Serbia 90
111DunkirkHauts-de-France, France 90
112WarsawMazovia, Poland 90
=113Chinch'ŏnNorth Chungcheong, South Korea 90
=113WrocławLower Silesia, Poland 90
115Icheon-siGyeonggi-do, South Korea 89
116GdańskPomerania, Poland 88
117TainanTaiwan, Taiwan 88
=118KathmanduBagmati Province, Nepal 88
=118KaohsiungTakao, Taiwan 88
120MiddelburgMpumalanga, South Africa 87
=121GongjuChungcheongnam-do, South Korea 87
=121BredaNorth Brabant, The Netherlands 87
123LondonEngland, United Kingdom 87
124FresnoCalifornia, United States 87
125HanamGyeonggi-do, South Korea 87
126NitraNitra Region, Slovakia 86
=127Ban Khlong PrawetBangkok, Thailand 86
=127WŏnjuGangwon-do, South Korea 86
129NaplesCampania, Italy 85
130Ústí nad LabemÚstí nad Labem Region, Czechia 85
131MexicaliBaja California, Mexico 85
132Puerto MonttLos Lagos Region, Chile 85
133Taesal-liChungcheongnam-do, South Korea 84
134Nong KhaemBangkok, Thailand 84
135MasanGwangju, South Korea 83
=136MuanJeollanam-do, South Korea 83
=136GwangjuGyeonggi-do, South Korea 83
138Berlinlast full day 11 OctState of Berlin, Germany 83
139San Pedro SulaCortés Department, Honduras 82
140SuncheonJeollanam-do, South Korea 82
=141ImsilJeollabuk-do, South Korea 82
=141CharleroiWallonia, Belgium 82
=143KwangyangJeollanam-do, South Korea 81
=143KoesanNorth Chungcheong, South Korea 81
=143PueblaPuebla, Mexico 81
146KosaiShizuoka, Japan 81
=147YeosuJeollanam-do, South Korea 81
=147TalcaMaule Region, Chile 81
149Cremonalast full day 11 OctLombardy, Italy 80
150HumennéPrešov Region, Slovakia 80
151AntwerpFlanders, Belgium 80
=152HayangGyeongsangbuk-do, South Korea 79
=152MelseleFlanders, Belgium 79
=154Gyeongsan-siGyeongsangbuk-do, South Korea 79
=154Barra da TijucaRio de Janeiro, Brazil 79
=156OkazakiAichi, Japan 79
=156Duque de CaxiasRio de Janeiro, Brazil 79
158Los ÁngelesBiobio, Chile 79
=159RayongRayong, Thailand 78
=159Mueang NonthaburiNonthaburi, Thailand 78
=159ChungjuNorth Chungcheong, South Korea 78
162Bernau bei BerlinBrandenburg, Germany 78
=163StabroekFlanders, Belgium 77
=163Sai MaiBangkok, Thailand 77
=165DaeguDaegu, South Korea 77
=165HoustonTexas, United States 77
167LjubljanaLjubljana, Slovenia 77
=168SydneyNew South Wales, Australia 77
=168Saint-LouisSaint-Louis, Senegal 77
170GumiGyeongsangbuk-do, South Korea 76
=171KariyaAichi, Japan 76
=171West MifflinPennsylvania, United States 76
=171NisshinAichi, Japan 76
=174ToyotaAichi, Japan 76
=174ToyohashiAichi, Japan 76
176ChangwonGyeongsangnam-do, South Korea 76
=177NamyangjuGyeonggi-do, South Korea 75
=177FreetownWestern Area, Sierra Leone 75
=177BeverenFlanders, Belgium 75
=180Rio de JaneiroRio de Janeiro, Brazil 75
=180GuadalajaraJalisco, Mexico 75
=182CoronelBiobio, Chile 75
=182TōkaiAichi, Japan 75
184BiałystokPodlasie, Poland 74
=185Little RockArkansas, United States 74
=185AtlantaGeorgia, United States 74
=185Wake ForestNorth Carolina, United States 74
188NagoyaAichi, Japan 74
189Milanlast full day 11 OctLombardy, Italy 74
190GifuGifu, Japan 73
191TalcahuanoBiobio, Chile 73
192IndianapolisIndiana, United States 72
=193KurashikiOkayama, Japan 72
=193ZaanstadNorth Holland, The Netherlands 72
=195Donghae CityGangwon-do, South Korea 72
=195BrnoSouth Moravian, Czechia 72
197LewistonIdaho, United States 72
198GroningenGroningen, The Netherlands 71
199KofuYamanashi, Japan 71
200Jordan SpringsNew South Wales, Australia 71

What stands behind each figure: Checked at 2+ sites One reference monitor Low-cost sensors About these marks

Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.

Good0–50

Moderate51–100

Unhealthy for sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Not covered: the government monitoring networks of China, Turkey and Iran, which publish only on their own websites. We are building the reader for China's network. The networks of Turkey and Iran don't answer requests from outside their countries, so we can't read them. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, all cities ranked by checked peak PM2.5 (µg/m³), last 7 days to 14 Oct 2026, 07:00 UTC: each city's worst 6 hours in a row, read by 2 or more monitoring places 3 km or more apart, cities with a checked peak on 5 or more of the 7 days. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=7d&by=peak. Ranked on low-cost sensors, with no reference monitor in the city: #1 Burunday, #2 Faisalabad, #3 Otegen Batyra, #4 Multan, #6 Peshawar, #7 Lahore, #8 Gujranwala, #9 Dhaka and #10 Kinshasa. Some readings from Aurassure; Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published.

Download top 10 by average (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Updated 2026-10-14 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Aurassure; Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).