All 2,686 cities by PM2.5, last 24 hours

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

CPCB in India: no readings since 7 Oct (488 monitors). EEA in Spain: no readings since 10 Oct (310 monitors). Catalonia Medi Ambient I Sostenibilitat in Spain: no readings since 9 Oct (26 monitors). Their cities are missing from this board, not clean.

=1297Thousand OaksCalifornia, United States 38 US AQI0.5 times the WHO guideline▼670
=1297BremertonWashington, United States 38 US AQI0.5 times the WHO guideline▲752
=1297Barra da TijucaRio de Janeiro, Brazil 38 US AQI0.5 times the WHO guideline▼1127
=1297AmamiKagoshima, Japan 38 US AQI0.5 times the WHO guideline▲333
=1305TarnówLesser Poland, Poland 37 US AQI0.4 times the WHO guideline▲483
=1305MielecSubcarpathia, Poland 37 US AQI0.4 times the WHO guideline▼70
=1305T’aebaekGangwon-do, South Korea 37 US AQI0.4 times the WHO guideline▼907
=1305ŌamiChiba, Japan 37 US AQI0.4 times the WHO guideline▼267
=1305HitachiIbaraki, Japan 37 US AQI0.4 times the WHO guideline▼363
=1305Thièslow-cost sensorsThies, Senegal 37 US AQI0.4 times the WHO guideline▼2
=1305Velsen-ZuidNorth Holland, The Netherlands 37 US AQI0.4 times the WHO guideline
=1305Almere Stadlow-cost sensorsFlevoland, The Netherlands 37 US AQI0.4 times the WHO guideline
=1305WeizStyria, Austria 37 US AQI0.4 times the WHO guideline▲36
=1305Frankfurt am MainHesse, Germany 37 US AQI0.4 times the WHO guideline▲762
=1305Rio de JaneiroRio de Janeiro, Brazil 37 US AQI0.4 times the WHO guideline▼917
=1305ItaguaíRio de Janeiro, Brazil 37 US AQI0.4 times the WHO guideline▼1069
=1305SpringdaleArkansas, United States 37 US AQI0.4 times the WHO guideline▼648
=1305DouglasGeorgia, United States 37 US AQI0.4 times the WHO guideline▲43
=1305LawrencevilleGeorgia, United States 37 US AQI0.4 times the WHO guideline▲921
=1305AthensTennessee, United States 37 US AQI0.4 times the WHO guideline▲553
=1305MaryvilleTennessee, United States 37 US AQI0.4 times the WHO guideline▲969
=1305Wells BranchTexas, United States 37 US AQI0.4 times the WHO guideline▼211
=1305Bay CityMichigan, United States 37 US AQI0.4 times the WHO guideline▲141
=1305FolsomCalifornia, United States 37 US AQI0.4 times the WHO guideline▲13
=1305KentWashington, United States 37 US AQI0.4 times the WHO guideline▲147
=1305ChathamOntario, Canada 37 US AQI0.4 times the WHO guideline▲877
=1305DuncanBritish Columbia, Canada 37 US AQI0.4 times the WHO guideline▲245
=1305KagaIshikawa, Japan 37 US AQI0.4 times the WHO guideline▼383
=1305SodegauraChiba, Japan 37 US AQI0.4 times the WHO guideline▼205
=1330Dedovsklow-cost sensorsMoscow Oblast, Russia 37 US AQI0.4 times the WHO guideline
=1330Kyivlow-cost sensorsKyiv City, Ukraine 37 US AQI0.4 times the WHO guideline
=1330FerganaFergana, Uzbekistan 37 US AQI0.4 times the WHO guideline▼1036
=1330UjiKyoto, Japan 37 US AQI0.4 times the WHO guideline
=1330TsurugaFukui, Japan 37 US AQI0.4 times the WHO guideline▼527
=1330TochigiTochigi, Japan 37 US AQI0.4 times the WHO guideline▼284
=1330TakarazukaHyōgo, Japan 37 US AQI0.4 times the WHO guideline▼324
=1330IkarugaHyōgo, Japan 37 US AQI0.4 times the WHO guideline▼280
=1330ScunthorpeEngland, United Kingdom 37 US AQI0.4 times the WHO guideline▼291
=1330NijverdalOverijssel, The Netherlands 37 US AQI0.4 times the WHO guideline▲888
=1330MontbéliardBourgogne-Franche-Comté, France 37 US AQI0.4 times the WHO guideline▼171
=1330AnnecyAuvergne-Rhône-Alpes, France 37 US AQI0.4 times the WHO guideline▲232
=1330BorgomaneroPiedmont, Italy 37 US AQI0.4 times the WHO guideline▼303
=1330DallasTexas, United States 37 US AQI0.4 times the WHO guideline▼645
=1330ClevelandOhio, United States 37 US AQI0.4 times the WHO guideline▲947
=1330DublinOhio, United States 37 US AQI0.4 times the WHO guideline▲843
=1330VermillionSouth Dakota, United States 37 US AQI0.4 times the WHO guideline▼99
=1330AtascaderoCalifornia, United States 37 US AQI0.4 times the WHO guideline▼567
=1330White CenterWashington, United States 37 US AQI0.4 times the WHO guideline▲123
=1330AllistonOntario, Canada 37 US AQI0.4 times the WHO guideline▲453
=1350CiechanówMazovia, Poland 36 US AQI0.4 times the WHO guideline▼421
=1350Kemerovolow-cost sensorsKuzbass, Russia 36 US AQI0.4 times the WHO guideline
=1350ToyonakaOsaka, Japan 36 US AQI0.4 times the WHO guideline▼368
=1350KōtariKyoto, Japan 36 US AQI0.4 times the WHO guideline▼411
=1350RichmondNew South Wales, Australia 36 US AQI0.4 times the WHO guideline▼194
=1350EibergenGelderland, The Netherlands 36 US AQI0.4 times the WHO guideline▲676
=1350Doetinchemlow-cost sensorsGelderland, The Netherlands 36 US AQI0.4 times the WHO guideline
=1350Amersfoortlow-cost sensorsUtrecht, The Netherlands 36 US AQI0.4 times the WHO guideline
=1350SchwerinMecklenburg-Vorpommern, Germany 36 US AQI0.4 times the WHO guideline▲957
=1350PécsBaranya, Hungary 36 US AQI0.4 times the WHO guideline▼167
=1350BogotáBogota D.C., Colombia 36 US AQI0.4 times the WHO guideline▲123
=1350New AlbanyIndiana, United States 36 US AQI0.4 times the WHO guideline
=1350HaysvilleKansas, United States 36 US AQI0.4 times the WHO guideline▼715
=1350GalvestonTexas, United States 36 US AQI0.4 times the WHO guideline▲392
=1350Apache JunctionArizona, United States 36 US AQI0.4 times the WHO guideline▼264
=1350West JordanUtah, United States 36 US AQI0.4 times the WHO guideline▲861
=1350L'Ancienne-LoretteQuebec, Canada 36 US AQI0.4 times the WHO guideline▼107
=1367GyeongjuGyeongsangbuk-do, South Korea 36 US AQI0.4 times the WHO guideline▼736
=1367KamaishiIwate, Japan 36 US AQI0.4 times the WHO guideline▼437
=1367Meppellow-cost sensorsDrenthe, The Netherlands 36 US AQI0.4 times the WHO guideline
=1367Limburg an der LahnHesse, Germany 36 US AQI0.4 times the WHO guideline▲664
=1367PartizánskeTrenčín Region, Slovakia 36 US AQI0.4 times the WHO guideline▲27
=1367LiberecLiberec Region, Czechia 36 US AQI0.4 times the WHO guideline▲339
=1367SalernoCampania, Italy 36 US AQI0.4 times the WHO guideline▲102
=1367Presidente PrudenteSão Paulo, Brazil 36 US AQI0.4 times the WHO guideline▲105
=1367GainesvilleGeorgia, United States 36 US AQI0.4 times the WHO guideline▲880
=1367LafayetteLouisiana, United States 36 US AQI0.4 times the WHO guideline▼258
=1367Oklahoma CityOklahoma, United States 36 US AQI0.4 times the WHO guideline▼576
=1367CookevilleTennessee, United States 36 US AQI0.4 times the WHO guideline
=1379Nakhabinolow-cost sensorsMoscow Oblast, Russia 35 US AQI0.4 times the WHO guideline
=1379WawerMazovia, Poland 35 US AQI0.4 times the WHO guideline▼790
=1379ToyookaHyōgo, Japan 35 US AQI0.4 times the WHO guideline▼496
=1379TakatsukiOsaka, Japan 35 US AQI0.4 times the WHO guideline
=1379HirakataOsaka, Japan 35 US AQI0.4 times the WHO guideline
=1379ChristchurchCanterbury, New Zealand 35 US AQI0.4 times the WHO guideline▼112
=1379SwanseaWales, United Kingdom 35 US AQI0.4 times the WHO guideline▼75
=1379PayerneVaud, Switzerland 35 US AQI0.4 times the WHO guideline
=1379UtrechtUtrecht, The Netherlands 35 US AQI0.4 times the WHO guideline▲315
=1379LuxembourgLuxembourg, Luxembourg 35 US AQI0.4 times the WHO guideline▼6
=1379PanazolNew Aquitaine, France 35 US AQI0.4 times the WHO guideline▲510
=1379DoleBourgogne-Franche-Comté, France 35 US AQI0.4 times the WHO guideline▼169
=1379BayonneNew Aquitaine, France 35 US AQI0.4 times the WHO guideline▼156
=1379Ústí nad LabemÚstí nad Labem Region, Czechia 35 US AQI0.4 times the WHO guideline▼23
=1379Reggio nell'Emilialow-cost sensorsEmilia-Romagna, Italy 35 US AQI0.4 times the WHO guideline
=1379CasertaCampania, Italy 35 US AQI0.4 times the WHO guideline▼326
=1379BeneventoCampania, Italy 35 US AQI0.4 times the WHO guideline▼48
=1379AcerraCampania, Italy 35 US AQI0.4 times the WHO guideline▼325
=1379AugustaGeorgia, United States 35 US AQI0.4 times the WHO guideline▲143
=1379DyersburgTennessee, United States 35 US AQI0.4 times the WHO guideline▲40
=1379Brookfieldlow-cost sensorsWisconsin, United States 35 US AQI0.4 times the WHO guideline
=1379OceansideCalifornia, United States 35 US AQI0.4 times the WHO guideline▼846

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 and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, all cities ranked by mean PM2.5 (µg/m³), last 24 hours to 13 Oct 2026, 05:00 UTC: each city's mean of its hourly values, cities measured in 18 or more of the 24 hours. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings. Ranked on low-cost sensors, with no reference monitor in the city: #1 Queenstown Estate, #3 Lyubertsy, #4 Gaur, Madhesh, #5 Dubai, #7 Dhaka, #8 Multan, #9 Faisalabad and #10 Gujranwala. Some values from Sensor.Community, ODbL. Some readings from Uzhydromet (Uzbekistan's Hydrometeorological Service); Vietnam's government monitors; Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published.

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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 2026-10-13 05:07 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: Uzhydromet (Uzbekistan's Hydrometeorological Service); Vietnam's government monitors; Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).