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.

796WhittierCalifornia, United States 57 US AQI2.5 times the WHO guideline▼94
=802Piatra NeamţNeamț County, Romania 57 US AQI2.5 times the WHO guideline▼115
=802PattaniPattani, Thailand 57 US AQI2.5 times the WHO guideline▼98
=802LuguTaiwan, Taiwan 57 US AQI2.5 times the WHO guideline▼91
=802Murcialast full day 11 OctMurcia, Spain 57 US AQI2.5 times the WHO guideline
=802WolfsbergCarinthia, Austria 57 US AQI2.5 times the WHO guideline▼88
=802PezinokBratislava Region, Slovakia 57 US AQI2.5 times the WHO guideline
=802MostÚstí nad Labem Region, Czechia 57 US AQI2.5 times the WHO guideline
=802KroměřížZlín, Czechia 57 US AQI2.5 times the WHO guideline
=802KladnoCentral Bohemia, Czechia 57 US AQI2.5 times the WHO guideline
=802Visalialast full day 7 OctCalifornia, United States 57 US AQI2.5 times the WHO guideline▼92
=812GangneungGangwon-do, South Korea 57 US AQI2.4 times the WHO guideline▼100
=812HaarlemNorth Holland, The Netherlands 57 US AQI2.4 times the WHO guideline
=812Liptovský MikulášŽilina Region, Slovakia 57 US AQI2.4 times the WHO guideline
=812BratislavaBratislava Region, Slovakia 57 US AQI2.4 times the WHO guideline▲500
=812BrnoSouth Moravian, Czechia 57 US AQI2.4 times the WHO guideline
=812San Miguel de Allendelast full day 11 OctGuanajuato, Mexico 57 US AQI2.4 times the WHO guideline▼94
=812AbasoloGuanajuato, Mexico 57 US AQI2.4 times the WHO guideline▼104
=812MaumeeOhio, United States 57 US AQI2.4 times the WHO guideline▼103
=820KlaipėdaKlaipėda County, Lithuania 57 US AQI2.4 times the WHO guideline
=820SzegedCsongrád, Hungary 57 US AQI2.4 times the WHO guideline▼117
=820PopradPrešov Region, Slovakia 57 US AQI2.4 times the WHO guideline
=820MiaoliTaiwan, Taiwan 57 US AQI2.4 times the WHO guideline▼100
=820XizhiTaipei, Taiwan 57 US AQI2.4 times the WHO guideline▼92
=820JumunjinGangwon-do, South Korea 57 US AQI2.4 times the WHO guideline▼99
=820Shin’ichiHiroshima, Japan 57 US AQI2.4 times the WHO guideline▼98
=820FukuyamaHiroshima, Japan 57 US AQI2.4 times the WHO guideline▼115
=820Fürstenfeldlast full day 24 SeptStyria, Austria 57 US AQI2.4 times the WHO guideline▼91
=820Unnalast full day 10 OctNorth Rhine-Westphalia, Germany 57 US AQI2.4 times the WHO guideline▼138
=820HodonínSouth Moravian, Czechia 57 US AQI2.4 times the WHO guideline
=820CastlegarBritish Columbia, Canada 57 US AQI2.4 times the WHO guideline▼95
=820BoseongJeollanam-do, South Korea 57 US AQI2.4 times the WHO guideline▼88
=833Speyerlast full day 10 OctRheinland-Pfalz, Germany 56 US AQI2.4 times the WHO guideline▼127
=833EisenhüttenstadtBrandenburg, Germany 56 US AQI2.4 times the WHO guideline▼117
=833Ciudad JuárezChihuahua, Mexico 56 US AQI2.4 times the WHO guideline▼110
=833MissionTexas, United States 56 US AQI2.4 times the WHO guideline▼109
=837DaxiTaiwan, Taiwan 56 US AQI2.4 times the WHO guideline▼104
=837Ponggae-dongJeju-do, South Korea 56 US AQI2.4 times the WHO guideline▼103
=837HnúšťaBanská Bystrica Region, Slovakia 56 US AQI2.4 times the WHO guideline▲675
=837ZnojmoSouth Moravian, Czechia 56 US AQI2.4 times the WHO guideline
=837CeljeUrban Municipality of Celje, Slovenia 56 US AQI2.4 times the WHO guideline▼52
=837Elmwood ParkIllinois, United States 56 US AQI2.4 times the WHO guideline▼158
=837BakersfieldCalifornia, United States 56 US AQI2.4 times the WHO guideline▼100
=844WawerMazovia, Poland 56 US AQI2.4 times the WHO guideline
=844TaipeiTaiwan, Taiwan 56 US AQI2.4 times the WHO guideline▼105
=844GiubiascoTicino, Switzerland 56 US AQI2.4 times the WHO guideline▼131
=844NeubrandenburgMecklenburg-Vorpommern, Germany 56 US AQI2.4 times the WHO guideline▼171
=844JundiaíSão Paulo, Brazil 56 US AQI2.4 times the WHO guideline▼100
=844Guanajuatolast full day 11 OctGuanajuato, Mexico 56 US AQI2.4 times the WHO guideline▼99
=844Port Isabellast full day 11 OctTexas, United States 56 US AQI2.4 times the WHO guideline▼98
=851VilniusVilnius, Lithuania 56 US AQI2.3 times the WHO guideline
=851PhatthalungPhatthalung, Thailand 56 US AQI2.3 times the WHO guideline▼104
=851SaijōEhime, Japan 56 US AQI2.3 times the WHO guideline▼100
=851Teltowlast full day 10 OctBrandenburg, Germany 56 US AQI2.3 times the WHO guideline▼103
=851VeszprémVeszprém, Hungary 56 US AQI2.3 times the WHO guideline▼116
=851Ústí nad LabemÚstí nad Labem Region, Czechia 56 US AQI2.3 times the WHO guideline
=851JihlavaVysocina, Czechia 56 US AQI2.3 times the WHO guideline
=851České BudějoviceSouth Bohemian Region, Czechia 56 US AQI2.3 times the WHO guideline
=851BiellaPiedmont, Italy 56 US AQI2.3 times the WHO guideline
=851EvanstonIllinois, United States 56 US AQI2.3 times the WHO guideline
=851Wittenberglast full day 10 OctSaxony-Anhalt, Germany 56 US AQI2.3 times the WHO guideline▼125
=851New Taipei CityTaipei, Taiwan 56 US AQI2.3 times the WHO guideline▼94
=863BailénAndalusia, Spain 56 US AQI2.3 times the WHO guideline
=863PécsBaranya, Hungary 56 US AQI2.3 times the WHO guideline▼132
=863DunaújvárosFejér, Hungary 56 US AQI2.3 times the WHO guideline▼113
=863BudapestBudapest, Hungary 56 US AQI2.3 times the WHO guideline▼127
=863KadaňÚstí nad Labem Region, Czechia 56 US AQI2.3 times the WHO guideline
=863CorcoranCalifornia, United States 56 US AQI2.3 times the WHO guideline▼110
=869ShenzhenTaiwan, Taiwan 55 US AQI2.3 times the WHO guideline▼111
=869XizhouTaiwan, Taiwan 55 US AQI2.3 times the WHO guideline▼110
=869T’aebaekGangwon-do, South Korea 55 US AQI2.3 times the WHO guideline▼109
=869Leobenlast full day 24 SeptStyria, Austria 55 US AQI2.3 times the WHO guideline▼102
=869Oranienburglast full day 10 OctBrandenburg, Germany 55 US AQI2.3 times the WHO guideline▼128
=869Halle (Saale)last full day 10 OctSaxony-Anhalt, Germany 55 US AQI2.3 times the WHO guideline▼154
=869Dessaulast full day 10 OctSaxony-Anhalt, Germany 55 US AQI2.3 times the WHO guideline▼152
=869Duque de CaxiasRio de Janeiro, Brazil 55 US AQI2.3 times the WHO guideline▼106
=869PalmyraNew Jersey, United States 55 US AQI2.3 times the WHO guideline▼105
=869OntarioOregon, United States 55 US AQI2.3 times the WHO guideline▼98
=869KaiapoiCanterbury, New Zealand 55 US AQI2.3 times the WHO guideline▼114
=869SeogwipoJeju-do, South Korea 55 US AQI2.3 times the WHO guideline▼113
=881HsinchuTaiwan, Taiwan 55 US AQI2.3 times the WHO guideline▼105
=881Alcantarillalast full day 11 OctMurcia, Spain 55 US AQI2.3 times the WHO guideline
=881Magdeburglast full day 10 OctSaxony-Anhalt, Germany 55 US AQI2.3 times the WHO guideline▼151
=881PrievidzaTrenčín Region, Slovakia 55 US AQI2.3 times the WHO guideline▲246
=881ElblągWarmia-Masuria, Poland 55 US AQI2.3 times the WHO guideline▼183
=881ZumarragaBasque Country, Spain 55 US AQI2.3 times the WHO guideline
=881Borgo ValsuganaTrentino-Alto Adige, Italy 55 US AQI2.3 times the WHO guideline
=881Novo MestoUrban Municipality of Novo Mesto, Slovenia 55 US AQI2.3 times the WHO guideline▼22
=881OregonOhio, United States 55 US AQI2.3 times the WHO guideline▼112
=881FontanaCalifornia, United States 55 US AQI2.3 times the WHO guideline▼111
=881El PasoTexas, United States 55 US AQI2.3 times the WHO guideline▼127
=881TaoyuanTaiwan, Taiwan 55 US AQI2.3 times the WHO guideline▼90
=893Betonglast full day 11 OctYala, Thailand 55 US AQI2.3 times the WHO guideline▼119
=893MagongTaiwan, Taiwan 55 US AQI2.3 times the WHO guideline▼118
=893EisenzickenBurgenland, Austria 55 US AQI2.3 times the WHO guideline▼115
=893PartizánskeTrenčín Region, Slovakia 55 US AQI2.3 times the WHO guideline▲759
=893LiberecLiberec Region, Czechia 55 US AQI2.3 times the WHO guideline
=893São José do Rio PretoSão Paulo, Brazil 55 US AQI2.3 times the WHO guideline▼107
=893Ribeirão PretoSão Paulo, Brazil 55 US AQI2.3 times the WHO guideline▼106
=893ShreveportLouisiana, United States 55 US AQI2.3 times the WHO guideline▼105

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).