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.

=941MiharaHiroshima, Japan 49 US AQI0.6 times the WHO guideline▼367
=941MatsudoChiba, Japan 49 US AQI0.6 times the WHO guideline▼7
=941KishiwadaOsaka, Japan 49 US AQI0.6 times the WHO guideline▼23
=941IyoEhime, Japan 49 US AQI0.6 times the WHO guideline▼293
=941DakarDakar, Senegal 49 US AQI0.6 times the WHO guideline▼278
=941WeizStyria, Austria 49 US AQI0.6 times the WHO guideline▲372
=941SereďTrnava Region, Slovakia 49 US AQI0.6 times the WHO guideline▲475
=941ZlínZlín, Czechia 49 US AQI0.6 times the WHO guideline▼242
=941ToruńKujawsko-Pomorskie, Poland 49 US AQI0.6 times the WHO guideline▲552
=941NovaraPiedmont, Italy 49 US AQI0.6 times the WHO guideline▼273
=941GreenvilleSouth Carolina, United States 49 US AQI0.6 times the WHO guideline▲990
=941AkronOhio, United States 49 US AQI0.6 times the WHO guideline▲859
=941DublinOhio, United States 49 US AQI0.6 times the WHO guideline▲404
=941SteubenvilleOhio, United States 49 US AQI0.6 times the WHO guideline▲1051
=941BadgerAlaska, United States 49 US AQI0.6 times the WHO guideline▲928
=941AllistonOntario, Canada 49 US AQI0.6 times the WHO guideline▲408
=941EdmontonAlberta, Canada 49 US AQI0.6 times the WHO guideline▲1265
not rankedOdorheiu SecuiescHarghita County, Romania 49 US AQI0.6 times the WHO guideline
not rankedBeijingBeijing, China 49 US AQI0.6 times the WHO guideline
not rankedBaunatalHesse, Germany 49 US AQI0.6 times the WHO guideline
not rankedPetržalkaBratislava Region, Slovakia 49 US AQI0.6 times the WHO guideline
=958DebrecenHajdú-Bihar, Hungary 49 US AQI0.6 times the WHO guideline▲28
=958SofiaSofia-Capital, Bulgaria 49 US AQI0.6 times the WHO guideline▲223
=958BiałystokPodlasie, Poland 49 US AQI0.6 times the WHO guideline▼397
=958KavadarciKavadarci, North Macedonia 49 US AQI0.6 times the WHO guideline▲286
=958TanabeWakayama, Japan 49 US AQI0.6 times the WHO guideline▼438
=958NagasakiNagasaki, Japan 49 US AQI0.6 times the WHO guideline▼178
=958KogaIbaraki, Japan 49 US AQI0.6 times the WHO guideline▲190
=958LinzUpper Austria, Austria 49 US AQI0.6 times the WHO guideline▲650
=958SulzbachHesse, Germany 49 US AQI0.6 times the WHO guideline▲307
=958HandlováTrenčín Region, Slovakia 49 US AQI0.6 times the WHO guideline▲292
=958MiamiOklahoma, United States 49 US AQI0.6 times the WHO guideline▼59
=958TrentonNew Jersey, United States 49 US AQI0.6 times the WHO guideline▲1033
=958CanonsburgPennsylvania, United States 49 US AQI0.6 times the WHO guideline▲1062
=958SchlusserPennsylvania, United States 49 US AQI0.6 times the WHO guideline▲1375
=958TacomaWashington, United States 49 US AQI0.6 times the WHO guideline▼123
=958InzaiChiba, Japan 49 US AQI0.6 times the WHO guideline▲45
=958Kennedy TownshipPennsylvania, United States 49 US AQI0.6 times the WHO guideline▲943
=958AridaWakayama, Japan 49 US AQI0.6 times the WHO guideline▼152
=958Dodong-riGyeongsangbuk-do, South Korea 49 US AQI0.6 times the WHO guideline▼10
not rankedMoskovskiyMoscow, Russia 49 US AQI0.6 times the WHO guideline
not rankedAnsfeldenUpper Austria, Austria 49 US AQI0.6 times the WHO guideline
not rankedHerzogenaurachBavaria, Germany 49 US AQI0.6 times the WHO guideline
not rankedKaposvárSomogy County, Hungary 49 US AQI0.6 times the WHO guideline
not rankedFishersIndiana, United States 49 US AQI0.6 times the WHO guideline
not rankedMorgantownWest Virginia, United States 49 US AQI0.6 times the WHO guideline
=977PrešovPrešov Region, Slovakia 48 US AQI0.6 times the WHO guideline▲299
=977YasothonYasothon, Thailand 48 US AQI0.6 times the WHO guideline▼764
=977NishinomiyaHyōgo, Japan 48 US AQI0.6 times the WHO guideline
=977IwakuniYamaguchi, Japan 48 US AQI0.6 times the WHO guideline▼180
=977IsahayaNagasaki, Japan 48 US AQI0.6 times the WHO guideline▼549
=977Tagajō-shiMiyagi, Japan 48 US AQI0.6 times the WHO guideline▼206
=977SagaeYamagata, Japan 48 US AQI0.6 times the WHO guideline▼588
=977ObihiroHokkaido, Japan 48 US AQI0.6 times the WHO guideline▼338
=977ToowoombaQueensland, Australia 48 US AQI0.6 times the WHO guideline▼477
=977WinterthurZurich, Switzerland 48 US AQI0.6 times the WHO guideline▲863
=977Sankt ValentinLower Austria, Austria 48 US AQI0.6 times the WHO guideline▲531
=977GänserndorfLower Austria, Austria 48 US AQI0.6 times the WHO guideline▲934
=977WiesbadenHesse, Germany 48 US AQI0.6 times the WHO guideline▲580
=977Bad Homburg vor der HöheHesse, Germany 48 US AQI0.6 times the WHO guideline
=977MexicaliBaja California, Mexico 48 US AQI0.6 times the WHO guideline▼441
=977SpringdaleArkansas, United States 48 US AQI0.6 times the WHO guideline▲340
=977Ponte Vedra BeachFlorida, United States 48 US AQI0.6 times the WHO guideline▲81
=977Wood RiverIllinois, United States 48 US AQI0.6 times the WHO guideline▼259
=977JacksonMississippi, United States 48 US AQI0.6 times the WHO guideline▼485
=977MorrisvilleNorth Carolina, United States 48 US AQI0.6 times the WHO guideline▲1352
=977Winston-SalemNorth Carolina, United States 48 US AQI0.6 times the WHO guideline▲1302
=977HudsonvilleMichigan, United States 48 US AQI0.6 times the WHO guideline▲195
=977Lincoln ParkMichigan, United States 48 US AQI0.6 times the WHO guideline▼52
=977LebanonPennsylvania, United States 48 US AQI0.6 times the WHO guideline▲1381
=977BramptonOntario, Canada 48 US AQI0.6 times the WHO guideline▲24
=977YachiyoChiba, Japan 48 US AQI0.6 times the WHO guideline▲64
=977KirishimaKagoshima, Japan 48 US AQI0.6 times the WHO guideline▼172
not rankedLas Rozas de MadridMadrid, Spain 48 US AQI0.6 times the WHO guideline
not rankedBrandonFlorida, United States 48 US AQI0.6 times the WHO guideline
=1004SandachōHyōgo, Japan 48 US AQI0.6 times the WHO guideline▲120
=1004KanazawaIshikawa, Japan 48 US AQI0.6 times the WHO guideline▲161
=1004HirosakiAomori, Japan 48 US AQI0.6 times the WHO guideline▼556
=1004BristolEngland, United Kingdom 48 US AQI0.6 times the WHO guideline▲1532
=1004RegensburgBavaria, Germany 48 US AQI0.6 times the WHO guideline▼923
=1004ClemmonsNorth Carolina, United States 48 US AQI0.6 times the WHO guideline▲1243
=1004YpsilantiMichigan, United States 48 US AQI0.6 times the WHO guideline▲136
=1004Natrona HeightsPennsylvania, United States 48 US AQI0.6 times the WHO guideline▲1082
=1004OconomowocWisconsin, United States 48 US AQI0.6 times the WHO guideline▼446
=1004GuadalupeCalifornia, United States 48 US AQI0.6 times the WHO guideline▲94
=1004MaderaCalifornia, United States 48 US AQI0.6 times the WHO guideline▼330
=1004LondonOntario, Canada 48 US AQI0.6 times the WHO guideline▲59
=1004Arden-ArcadeCalifornia, United States 48 US AQI0.6 times the WHO guideline▼313
not rankedSmolenskSmolensk Oblast, Russia 48 US AQI0.6 times the WHO guideline
not rankedSulejówekMazovia, Poland 48 US AQI0.6 times the WHO guideline
not rankedAllschwilBasel-Landschaft, Switzerland 48 US AQI0.6 times the WHO guideline
not rankedBreznoBanská Bystrica Region, Slovakia 48 US AQI0.6 times the WHO guideline
not rankedWinter GardenFlorida, United States 48 US AQI0.6 times the WHO guideline
not rankedWaynesboroVirginia, United States 48 US AQI0.6 times the WHO guideline
not rankedFerndaleMichigan, United States 48 US AQI0.6 times the WHO guideline
not rankedPraga PołudnieMazovia, Poland 48 US AQI0.6 times the WHO guideline
=1017ChumphonChumphon, Thailand 47 US AQI0.6 times the WHO guideline▲105
=1017GrangemouthScotland, United Kingdom 47 US AQI0.6 times the WHO guideline▲639
=1017AmstettenLower Austria, Austria 47 US AQI0.6 times the WHO guideline▲706
=1017AnnemasseAuvergne-Rhône-Alpes, France 47 US AQI0.6 times the WHO guideline▲398

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).