All 3,198 cities by PM2.5, this year

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

CPCB in India: no readings since 12 Oct (488 monitors). EEA and Catalonia Medi Ambient I Sostenibilitat in Spain: no readings since 13 Oct (336 monitors). Their cities show older figures or are missing from this board, not clean.

=699DakarDakar, Senegal 60 US AQI2.7 times the WHO guideline▼68
=699GrazStyria, Austria 60 US AQI2.7 times the WHO guideline▼67
=699PłockMazovia, Poland 60 US AQI2.7 times the WHO guideline▼108
=704Iaşilast full day 10 OctIași County, Romania 59 US AQI2.7 times the WHO guideline▼82
=704Codlealast full day 10 OctBrașov County, Romania 59 US AQI2.7 times the WHO guideline▼70
=704BuziTaiwan, Taiwan 59 US AQI2.7 times the WHO guideline▼65
=704KimhaeGyeongsangnam-do, South Korea 59 US AQI2.7 times the WHO guideline▼68
=704Berlinlast full day 11 OctState of Berlin, Germany 59 US AQI2.7 times the WHO guideline▼89
=709Otopenilast full day 10 OctIlfov, Romania 59 US AQI2.7 times the WHO guideline▼76
=709Cluj-Napocalast full day 10 OctCluj County, Romania 59 US AQI2.7 times the WHO guideline▼100
=709BardejovPrešov Region, Slovakia 59 US AQI2.7 times the WHO guideline
=709ChumphonChumphon, Thailand 59 US AQI2.7 times the WHO guideline▼71
=709TaichungTaiwan, Taiwan 59 US AQI2.7 times the WHO guideline▼67
=709YangsanGyeongsangnam-do, South Korea 59 US AQI2.7 times the WHO guideline▼66
=709ChuncheonGangwon-do, South Korea 59 US AQI2.7 times the WHO guideline▼69
=709ChanghuaTaiwan, Taiwan 59 US AQI2.7 times the WHO guideline▼65
=709ŻabbarĦaż-Żabbar, Malta no daily values yet59 US AQI2.7 times the WHO guideline
=709ZlínZlín, Czechia 59 US AQI2.7 times the WHO guideline
=709SolofraCampania, Italy 59 US AQI2.7 times the WHO guideline
=709KamloopsBritish Columbia, Canada 59 US AQI2.7 times the WHO guideline▼68
=721SenecBratislava Region, Slovakia 59 US AQI2.7 times the WHO guideline
=721PraguePrague, Czechia 59 US AQI2.7 times the WHO guideline
=721MantuaLombardy, Italy 59 US AQI2.7 times the WHO guideline
=721BeneventoCampania, Italy 59 US AQI2.7 times the WHO guideline
=721PesqueríaNuevo León, Mexico 59 US AQI2.7 times the WHO guideline▼76
=726ShulinTaipei, Taiwan 59 US AQI2.7 times the WHO guideline▼79
=726OnomichiHiroshima, Japan 59 US AQI2.7 times the WHO guideline▼80
=726Sainte-Geneviève-des-BoisÎle-de-France, France 59 US AQI2.7 times the WHO guideline
=726SlatinaSouth Moravian, Czechia 59 US AQI2.7 times the WHO guideline
=726PtujUrban Municipality of Ptuj, Slovenia 59 US AQI2.7 times the WHO guideline▼19
=726Wake ForestNorth Carolina, United States 59 US AQI2.7 times the WHO guideline▼58
=732MuanJeollanam-do, South Korea 59 US AQI2.6 times the WHO guideline▼84
=732Cheongsong gunGyeongsangbuk-do, South Korea 59 US AQI2.6 times the WHO guideline▼83
=732WschowaLubusz, Poland 59 US AQI2.6 times the WHO guideline▼95
=732MiamiOklahoma, United States 59 US AQI2.6 times the WHO guideline▼82
=736RēzekneRēzekne, Latvia 58 US AQI2.6 times the WHO guideline▼85
=736Holbocalast full day 10 OctIași County, Romania 58 US AQI2.6 times the WHO guideline▼84
=736UngsangGyeongsangnam-do, South Korea 58 US AQI2.6 times the WHO guideline▼81
=736Murska SobotaUrban Municipality of Murska Sobota, Slovenia 58 US AQI2.6 times the WHO guideline▼37
=736Ferraz de VasconcelosSão Paulo, Brazil 58 US AQI2.6 times the WHO guideline▼78
=736Royal OakMichigan, United States 58 US AQI2.6 times the WHO guideline▼61
=736GeojeGyeongsangnam-do, South Korea 58 US AQI2.6 times the WHO guideline▼77
=743RuseRuse, Bulgaria 58 US AQI2.6 times the WHO guideline▼90
=743YangguGangwon-do, South Korea 58 US AQI2.6 times the WHO guideline▼82
=743SuncheonJeollanam-do, South Korea 58 US AQI2.6 times the WHO guideline▼81
=743KwangyangJeollanam-do, South Korea 58 US AQI2.6 times the WHO guideline▼80
=743JangheungJeollanam-do, South Korea 58 US AQI2.6 times the WHO guideline▼78
=743Knittelfeldlast full day 24 SeptStyria, Austria 58 US AQI2.6 times the WHO guideline▼62
=743SzczecinWest Pomerania, Poland 58 US AQI2.6 times the WHO guideline▼124
=743Limeiralast full day 5 OctSão Paulo, Brazil 58 US AQI2.6 times the WHO guideline▼76
=751Bucharestlast full day 10 OctBucharest, Romania 58 US AQI2.6 times the WHO guideline▼91
=751ŻyrardówMazovia, Poland 58 US AQI2.6 times the WHO guideline
=751GijangBusan, South Korea 58 US AQI2.6 times the WHO guideline▼87
=751HwacheonGangwon-do, South Korea 58 US AQI2.6 times the WHO guideline▼82
=751HitaOita, Japan 58 US AQI2.6 times the WHO guideline▼80
=751ToledoCastille-La Mancha, Spain 58 US AQI2.6 times the WHO guideline
=751SereďTrnava Region, Slovakia 58 US AQI2.6 times the WHO guideline
=751Tula de AllendeHidalgo, Mexico 58 US AQI2.6 times the WHO guideline▼77
=759Timişoaralast full day 10 OctTimiș County, Romania 58 US AQI2.6 times the WHO guideline▼82
=759Jeju CityJeju-do, South Korea 58 US AQI2.6 times the WHO guideline▼89
=759JangseongJeollanam-do, South Korea 58 US AQI2.6 times the WHO guideline▼81
=759GwangyangJeollanam-do, South Korea 58 US AQI2.6 times the WHO guideline▼87
=759PardubicePardubice Region, Czechia 58 US AQI2.6 times the WHO guideline
=759RoveretoTrentino-Alto Adige, Italy 58 US AQI2.6 times the WHO guideline
=759OmegnaPiedmont, Italy 58 US AQI2.6 times the WHO guideline
=759PrinevilleOregon, United States 58 US AQI2.6 times the WHO guideline▼83
=767NeiliTaiwan, Taiwan 58 US AQI2.5 times the WHO guideline▼79
=767GaigeturiJeju-do, South Korea 58 US AQI2.5 times the WHO guideline▼87
=767SevillaAndalusia, Spain 58 US AQI2.5 times the WHO guideline
=767WinterthurZurich, Switzerland 58 US AQI2.5 times the WHO guideline▲141
=767ZvolenBanská Bystrica Region, Slovakia 58 US AQI2.5 times the WHO guideline
=767NitraNitra Region, Slovakia 58 US AQI2.5 times the WHO guideline▲91
=767MalackyBratislava Region, Slovakia 58 US AQI2.5 times the WHO guideline
=767TepliceÚstí nad Labem Region, Czechia 58 US AQI2.5 times the WHO guideline
=767Zielona GóraLubusz, Poland 58 US AQI2.5 times the WHO guideline▼205
=767KołobrzegWest Pomerania, Poland 58 US AQI2.5 times the WHO guideline▼101
=767São PauloSão Paulo, Brazil 58 US AQI2.5 times the WHO guideline▼84
=767Imperial BeachCalifornia, United States 58 US AQI2.5 times the WHO guideline▼83
=779SidonSouth Governorate, Lebanon 58 US AQI2.5 times the WHO guideline▼93
=779KaunasKaunas, Lithuania 58 US AQI2.5 times the WHO guideline
=779GyeongjuGyeongsangbuk-do, South Korea 58 US AQI2.5 times the WHO guideline▼90
=779SenicaTrnava Region, Slovakia 58 US AQI2.5 times the WHO guideline▲174
=779NaplesCampania, Italy 58 US AQI2.5 times the WHO guideline
=779CasertaCampania, Italy 58 US AQI2.5 times the WHO guideline
=779SoachaCundinamarca, Colombia 58 US AQI2.5 times the WHO guideline
=779WyomingMichigan, United States 58 US AQI2.5 times the WHO guideline▼86
=779NampaIdaho, United States 58 US AQI2.5 times the WHO guideline▼94
=788BuyeoChungcheongnam-do, South Korea 57 US AQI2.5 times the WHO guideline▼93
=788YeosuJeollanam-do, South Korea 57 US AQI2.5 times the WHO guideline▼98
=788San Pawl il-BaħarSaint Paul’s Bay, Malta 57 US AQI2.5 times the WHO guideline▼97
=788MostaIl-Mosta, Malta 57 US AQI2.5 times the WHO guideline▼96
=788TrnavaTrnava Region, Slovakia 57 US AQI2.5 times the WHO guideline
=788Chorvátsky Grob - Čierna VodaBratislava Region, Slovakia 57 US AQI2.5 times the WHO guideline▲340
=788Novi SadVojvodina, Serbia 57 US AQI2.5 times the WHO guideline▼45
=788RiversideCalifornia, United States 57 US AQI2.5 times the WHO guideline▼92
=796LeibnitzStyria, Austria 57 US AQI2.5 times the WHO guideline▼99
=796Bernburglast full day 10 OctSaxony-Anhalt, Germany 57 US AQI2.5 times the WHO guideline▼140
=796Mladá BoleslavCentral Bohemia, Czechia 57 US AQI2.5 times the WHO guideline
=796Szczytnalast full day 11 OctLower Silesia, Poland 57 US AQI2.5 times the WHO guideline▼139
=796MaconGeorgia, United States 57 US AQI2.5 times the WHO guideline▼96

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 mean PM2.5 (µg/m³), this year to 14 Oct 2026, 06:00 UTC: each city's mean of its daily means, cities measured on 70% or more of the days since 1 January (at least 14). Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=year. Ranked on low-cost sensors, with no reference monitor in the city: #2 Faisalabad, #3 Gujranwala and #6 Lahore. Some values from Sensor.Community, ODbL. Some readings from Department of Environment, Nepal; Vietnam's government monitors; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published.

Download top 10 (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 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Department of Environment, Nepal; Vietnam's government monitors; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).