All 2,645 cities by PM2.5, last 24 hours

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 are missing from this board, not clean.

Hide the 1,153 cities with only 1–2 sensors

These cities have only one or two low-cost sensors, and one cheap unit can read well off, so they take no rank. They sit at their place by value, marked –, and every ranked city keeps its number.

not rankedSão LeopoldoRio Grande do Sul, Brazil 40 US AQI0.5 times the WHO guideline
not rankedCampo BomRio Grande do Sul, Brazil 40 US AQI0.5 times the WHO guideline
not rankedThe Trails of FriscoTexas, United States 40 US AQI0.5 times the WHO guideline
=1259KrasnodarKrasnodar Krai, Russia 39 US AQI0.5 times the WHO guideline▼582
=1259RuseRuse, Bulgaria 39 US AQI0.5 times the WHO guideline▼77
=1259GiubiascoTicino, Switzerland 39 US AQI0.5 times the WHO guideline▲321
=1259Heidenheim an der BrenzBaden-Wurttemberg, Germany 39 US AQI0.5 times the WHO guideline▼152
=1259WaterfordMunster, Ireland 39 US AQI0.5 times the WHO guideline▲278
=1259HaguenauGrand Est, France 39 US AQI0.5 times the WHO guideline▲303
=1259AlbertvilleAuvergne-Rhône-Alpes, France 39 US AQI0.5 times the WHO guideline▲282
=1259BrnoSouth Moravian, Czechia 39 US AQI0.5 times the WHO guideline▲158
=1259BorgomaneroPiedmont, Italy 39 US AQI0.5 times the WHO guideline▲83
=1259Zagorje ob SaviMunicipality of Zagorje ob Savi, Slovenia 39 US AQI0.5 times the WHO guideline▲359
=1259TampaFlorida, United States 39 US AQI0.5 times the WHO guideline▼39
=1259FayettevilleNorth Carolina, United States 39 US AQI0.5 times the WHO guideline▲933
=1259BloomingtonIllinois, United States 39 US AQI0.5 times the WHO guideline▼298
=1259LynnMassachusetts, United States 39 US AQI0.5 times the WHO guideline▲1312
=1259LincolnNebraska, United States 39 US AQI0.5 times the WHO guideline▲291
=1259BethlehemPennsylvania, United States 39 US AQI0.5 times the WHO guideline▲1255
=1259ArvadaColorado, United States 39 US AQI0.5 times the WHO guideline▲1100
=1259BremertonWashington, United States 39 US AQI0.5 times the WHO guideline▲43
not rankedBan KamalaPhuket, Thailand 39 US AQI0.5 times the WHO guideline
not rankedKamienna GóraLower Silesia, Poland 39 US AQI0.5 times the WHO guideline
not rankedWestonFlorida, United States 39 US AQI0.5 times the WHO guideline
not rankedNiagara FallsNew York, United States 39 US AQI0.5 times the WHO guideline
=1277KofuYamanashi, Japan 39 US AQI0.5 times the WHO guideline▼659
=1277IwataShizuoka, Japan 39 US AQI0.5 times the WHO guideline▼384
=1277Sankt PöltenLower Austria, Austria 39 US AQI0.5 times the WHO guideline▲306
=1277PerchtoldsdorfLower Austria, Austria 39 US AQI0.5 times the WHO guideline▲330
=1277LeibnitzStyria, Austria 39 US AQI0.5 times the WHO guideline▲257
=1277KlosterneuburgLower Austria, Austria 39 US AQI0.5 times the WHO guideline▲359
=1277JenbachTyrol, Austria 39 US AQI0.5 times the WHO guideline▲384
=1277ThionvilleGrand Est, France 39 US AQI0.5 times the WHO guideline▼147
=1277BelfortBourgogne-Franche-Comté, France 39 US AQI0.5 times the WHO guideline▼71
=1277BudapestBudapest, Hungary 39 US AQI0.5 times the WHO guideline▲945
=1277SenicaTrnava Region, Slovakia 39 US AQI0.5 times the WHO guideline▲265
=1277SopotPomerania, Poland 39 US AQI0.5 times the WHO guideline▲1001
=1277Santo AndréSão Paulo, Brazil 39 US AQI0.5 times the WHO guideline▲770
=1277FrostburgMaryland, United States 39 US AQI0.5 times the WHO guideline▲1050
=1277McAlesterOklahoma, United States 39 US AQI0.5 times the WHO guideline▲292
=1277CharlottesvilleVirginia, United States 39 US AQI0.5 times the WHO guideline▲1234
=1277RedfordMichigan, United States 39 US AQI0.5 times the WHO guideline▼138
=1277PortervilleCalifornia, United States 39 US AQI0.5 times the WHO guideline▼102
=1277Thousand OaksCalifornia, United States 39 US AQI0.5 times the WHO guideline▲24
=1277Yuba CityCalifornia, United States 39 US AQI0.5 times the WHO guideline▼489
=1277NanaimoBritish Columbia, Canada 39 US AQI0.5 times the WHO guideline▲983
not rankedStróvolosNicosia, Cyprus 39 US AQI0.5 times the WHO guideline
not rankedGalaţiGalați County, Romania 39 US AQI0.5 times the WHO guideline
not rankedPodunajské BiskupiceBratislava Region, Slovakia 39 US AQI0.5 times the WHO guideline
not rankedRacineWisconsin, United States 39 US AQI0.5 times the WHO guideline
not rankedQuinte WestOntario, Canada 39 US AQI0.5 times the WHO guideline
=1298SvishtovVeliko Tarnovo, Bulgaria 38 US AQI0.5 times the WHO guideline▲415
=1298SakaiminatoTottori, Japan 38 US AQI0.5 times the WHO guideline▲303
=1298YamagataYamagata, Japan 38 US AQI0.5 times the WHO guideline▼692
=1298BournemouthEngland, United Kingdom 38 US AQI0.5 times the WHO guideline▲1301
=1298SteyrUpper Austria, Austria 38 US AQI0.5 times the WHO guideline▲774
=1298Groß-EnzersdorfLower Austria, Austria 38 US AQI0.5 times the WHO guideline▲487
=1298WertheimBaden-Wurttemberg, Germany 38 US AQI0.5 times the WHO guideline▲237
=1298LudwigsburgBaden-Wurttemberg, Germany 38 US AQI0.5 times the WHO guideline▲395
=1298ErlangenBavaria, Germany 38 US AQI0.5 times the WHO guideline▲919
=1298La GardeProvence-Alpes-Côte d'Azur, France 38 US AQI0.5 times the WHO guideline▲114
=1298FréjusProvence-Alpes-Côte d'Azur, France 38 US AQI0.5 times the WHO guideline▲316
=1298KroměřížZlín, Czechia 38 US AQI0.5 times the WHO guideline▲318
=1298BogatyniaLower Silesia, Poland 38 US AQI0.5 times the WHO guideline▲470
=1298ComoLombardy, Italy 38 US AQI0.5 times the WHO guideline▲319
=1298BearDelaware, United States 38 US AQI0.5 times the WHO guideline▲1186
=1298WichitaKansas, United States 38 US AQI0.5 times the WHO guideline▼76
=1298MooreOklahoma, United States 38 US AQI0.5 times the WHO guideline▲403
=1298Kennett SquarePennsylvania, United States 38 US AQI0.5 times the WHO guideline▲1135
=1298ChampaignIllinois, United States 38 US AQI0.5 times the WHO guideline▼182
=1298Aizu-WakamatsuFukushima, Japan 38 US AQI0.5 times the WHO guideline▼643
not rankedKropyvnytskyiKirovohrad, Ukraine 38 US AQI0.5 times the WHO guideline
not rankedKruševacCentral Serbia, Serbia 38 US AQI0.5 times the WHO guideline
not rankedBikinKhabarovsk, Russia 38 US AQI0.5 times the WHO guideline
not rankedShenyangLiaoning, China 38 US AQI0.5 times the WHO guideline
not rankedRabatRabat-Salé-Kénitra, Morocco 38 US AQI0.5 times the WHO guideline
not rankedHerbornHesse, Germany 38 US AQI0.5 times the WHO guideline
not rankedFreisingBavaria, Germany no daily values yet38 US AQI0.5 times the WHO guideline
not rankedParklandFlorida, United States 38 US AQI0.5 times the WHO guideline
not rankedDowners GroveIllinois, United States 38 US AQI0.5 times the WHO guideline
=1318Port ShepstoneKwaZulu-Natal, South Africa 38 US AQI0.5 times the WHO guideline▼1109
=1318KōzakiChiba, Japan 38 US AQI0.5 times the WHO guideline▼152
=1318HitachiIbaraki, Japan 38 US AQI0.5 times the WHO guideline▼9
=1318KushiroHokkaido, Japan 38 US AQI0.5 times the WHO guideline▼494
=1318LondonEngland, United Kingdom 38 US AQI0.5 times the WHO guideline▲752
=1318ViennaVienna, Austria 38 US AQI0.5 times the WHO guideline▲525
=1318ReinheimHesse, Germany 38 US AQI0.5 times the WHO guideline▲528
=1318DarmstadtHesse, Germany 38 US AQI0.5 times the WHO guideline▲530
=1318LuxembourgLuxembourg, Luxembourg 38 US AQI0.5 times the WHO guideline▲70
=1318NavanLeinster, Ireland 38 US AQI0.5 times the WHO guideline▲981
=1318QuimperBrittany, France 38 US AQI0.5 times the WHO guideline▲1243
=1318VeszprémVeszprém, Hungary 38 US AQI0.5 times the WHO guideline▲110
=1318PaducahKentucky, United States 38 US AQI0.5 times the WHO guideline▼434
=1318ShreveportLouisiana, United States 38 US AQI0.5 times the WHO guideline▼222
=1318SpringfieldVirginia, United States 38 US AQI0.5 times the WHO guideline▲1206
=1318PawtucketRhode Island, United States 38 US AQI0.5 times the WHO guideline▲508
=1318Green BayWisconsin, United States 38 US AQI0.5 times the WHO guideline▼555
=1318LivermoreCalifornia, United States 38 US AQI0.5 times the WHO guideline
=1318Los AngelesCalifornia, United States 38 US AQI0.5 times the WHO guideline▲485
=1318Four CornersFlorida, United States 38 US AQI0.5 times the WHO guideline▼276

What stands behind each figure: Checked at 2+ sites One reference monitor Low-cost sensors 1–2 sensors, not ranked 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), last 24 hours to 14 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 Gaur, Madhesh, #2 Kuala Lumpur, #4 Multan, #5 Faisalabad, #6 Gujranwala, #7 Lilongwe, #8 Lahore, #9 Dhaka and #10 Bahawalpur. Some values from Sensor.Community, ODbL. Some readings from Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; 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 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: Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).