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.

=1404SzegedCsongrád, Hungary 36 US AQI0.4 times the WHO guideline▼173
=1404TōganeChiba, Japan 36 US AQI0.4 times the WHO guideline▼157
=1404SwindonEngland, United Kingdom 36 US AQI0.4 times the WHO guideline▲1234
=1404Velsen-ZuidNorth Holland, The Netherlands 36 US AQI0.4 times the WHO guideline▼93
=1404The HagueSouth Holland, The Netherlands 36 US AQI0.4 times the WHO guideline▲283
=1404RidderkerkSouth Holland, The Netherlands 36 US AQI0.4 times the WHO guideline▲255
=1404BarneveldGelderland, The Netherlands 36 US AQI0.4 times the WHO guideline▼215
=1404ApeldoornGelderland, The Netherlands 36 US AQI0.4 times the WHO guideline▼350
=1404BacknangBaden-Wurttemberg, Germany 36 US AQI0.4 times the WHO guideline▲783
=1404SligoConnacht, Ireland 36 US AQI0.4 times the WHO guideline▲992
=1404TrnavaTrnava Region, Slovakia 36 US AQI0.4 times the WHO guideline▲267
=1404Zielona GóraLubusz, Poland 36 US AQI0.4 times the WHO guideline▲680
=1404CremaLombardy, Italy 36 US AQI0.4 times the WHO guideline▲366
=1404New AlbanyIndiana, United States 36 US AQI0.4 times the WHO guideline▼43
=1404Fall RiverMassachusetts, United States 36 US AQI0.4 times the WHO guideline▲1109
=1404QuincyMassachusetts, United States 36 US AQI0.4 times the WHO guideline▲1082
=1404BrookfieldWisconsin, United States 36 US AQI0.4 times the WHO guideline▼5
=1404BerkeleyCalifornia, United States 36 US AQI0.4 times the WHO guideline
=1404CarsonCalifornia, United States 36 US AQI0.4 times the WHO guideline▲302
=1404VictorvilleCalifornia, United States 36 US AQI0.4 times the WHO guideline▲618
=1404GreshamOregon, United States 36 US AQI0.4 times the WHO guideline▲49
=1404MilwaukieOregon, United States 36 US AQI0.4 times the WHO guideline▼390
=1404White CenterWashington, United States 36 US AQI0.4 times the WHO guideline▼56
not rankedSilistraSilistra, Bulgaria 36 US AQI0.4 times the WHO guideline
not rankedEkibastuzPavlodar Region, Kazakhstan 36 US AQI0.4 times the WHO guideline
not rankedÍlhavoAveiro, Portugal 36 US AQI0.4 times the WHO guideline
not rankedMaldegemFlanders, Belgium 36 US AQI0.4 times the WHO guideline
not rankedSchwetzingenBaden-Wurttemberg, Germany 36 US AQI0.4 times the WHO guideline
not rankedKulmbachBavaria, Germany 36 US AQI0.4 times the WHO guideline
not rankedKempenNorth Rhine-Westphalia, Germany 36 US AQI0.4 times the WHO guideline
not rankedDeggendorfBavaria, Germany 36 US AQI0.4 times the WHO guideline
not rankedCoppellTexas, United States 36 US AQI0.4 times the WHO guideline
not rankedWarrenMichigan, United States 36 US AQI0.4 times the WHO guideline
not rankedArcataCalifornia, United States 36 US AQI0.4 times the WHO guideline
=1429ChaniáCrete, Greece 35 US AQI0.4 times the WHO guideline▲72
=1429HakodateHokkaido, Japan 35 US AQI0.4 times the WHO guideline▼630
=1429LisbonLisbon, Portugal 35 US AQI0.4 times the WHO guideline▲781
=1429SouthamptonEngland, United Kingdom 35 US AQI0.4 times the WHO guideline▲1104
=1429LeedsEngland, United Kingdom 35 US AQI0.4 times the WHO guideline▼279
=1429ZürichZurich, Switzerland 35 US AQI0.4 times the WHO guideline▲478
=1429KreuzlingenThurgau, Switzerland 35 US AQI0.4 times the WHO guideline▲548
=1429's-GravenzandeSouth Holland, The Netherlands 35 US AQI0.4 times the WHO guideline▲317
=1429SchiedamSouth Holland, The Netherlands 35 US AQI0.4 times the WHO guideline▲288
=1429RotterdamSouth Holland, The Netherlands 35 US AQI0.4 times the WHO guideline▲259
=1429PuttenGelderland, The Netherlands 35 US AQI0.4 times the WHO guideline▲76
=1429NoordwijkerhoutSouth Holland, The Netherlands 35 US AQI0.4 times the WHO guideline▲355
=1429DordrechtSouth Holland, The Netherlands 35 US AQI0.4 times the WHO guideline
=1429ArnhemGelderland, The Netherlands 35 US AQI0.4 times the WHO guideline▼147
=1429VoitsbergStyria, Austria 35 US AQI0.4 times the WHO guideline▲518
=1429FreistadtUpper Austria, Austria 35 US AQI0.4 times the WHO guideline▲327
=1429GentFlanders, Belgium 35 US AQI0.4 times the WHO guideline▲329
=1429TübingenBaden-Wurttemberg, Germany 35 US AQI0.4 times the WHO guideline▲360
=1429StuttgartBaden-Wurttemberg, Germany 35 US AQI0.4 times the WHO guideline▲237
=1429BlieskastelSaarland, Germany 35 US AQI0.4 times the WHO guideline▲789
=1429DroghedaLeinster, Ireland 35 US AQI0.4 times the WHO guideline▲705
=1429MulhouseGrand Est, France 35 US AQI0.4 times the WHO guideline▼277
=1429LorientBrittany, France 35 US AQI0.4 times the WHO guideline▲1001
=1429BordeauxNew Aquitaine, France 35 US AQI0.4 times the WHO guideline▼275
=1429KourouGuyane, French Guiana 35 US AQI0.4 times the WHO guideline▲529
=1429BrunswickGeorgia, United States 35 US AQI0.4 times the WHO guideline▼758
=1429HaysvilleKansas, United States 35 US AQI0.4 times the WHO guideline▼67
=1429MarvinNorth Carolina, United States 35 US AQI0.4 times the WHO guideline
=1429CatoosaOklahoma, United States 35 US AQI0.4 times the WHO guideline▲139
=1429North CharlestonSouth Carolina, United States 35 US AQI0.4 times the WHO guideline▲192
=1429Corpus ChristiTexas, United States 35 US AQI0.4 times the WHO guideline▲274
=1429HoustonTexas, United States 35 US AQI0.4 times the WHO guideline▲40
=1429Rose HillVirginia, United States 35 US AQI0.4 times the WHO guideline▲1139
=1429UxbridgeMassachusetts, United States 35 US AQI0.4 times the WHO guideline▲1115
=1429GridleyCalifornia, United States 35 US AQI0.4 times the WHO guideline▼255
=1429OrcuttCalifornia, United States 35 US AQI0.4 times the WHO guideline▼203
=1429Columbia FallsMontana, United States 35 US AQI0.4 times the WHO guideline
=1429NasushiobaraTochigi, Japan 35 US AQI0.4 times the WHO guideline
not rankedTegelenLimburg, The Netherlands 35 US AQI0.4 times the WHO guideline
not rankedEerselNorth Brabant, The Netherlands 35 US AQI0.4 times the WHO guideline
not rankedSchmelzSaarland, Germany 35 US AQI0.4 times the WHO guideline
not rankedRheinbergNorth Rhine-Westphalia, Germany 35 US AQI0.4 times the WHO guideline
=1467HaarlemNorth Holland, The Netherlands 34 US AQI0.4 times the WHO guideline
=1467Hanau am MainHesse, Germany 34 US AQI0.4 times the WHO guideline▲200
=1467RennesBrittany, France 34 US AQI0.4 times the WHO guideline▲986
=1467PassyAuvergne-Rhône-Alpes, France 34 US AQI0.4 times the WHO guideline▲94
=1467ArlesProvence-Alpes-Côte d'Azur, France 34 US AQI0.4 times the WHO guideline▲578
=1467PilsenPlzeň Region, Czechia 34 US AQI0.4 times the WHO guideline▲326
=1467KladnoCentral Bohemia, Czechia 34 US AQI0.4 times the WHO guideline▼21
=1467WschowaLubusz, Poland 34 US AQI0.4 times the WHO guideline▼665
=1467SpringfieldIllinois, United States 34 US AQI0.4 times the WHO guideline▼331
=1467South VinelandNew Jersey, United States 34 US AQI0.4 times the WHO guideline▲1043
=1467BrandermillVirginia, United States 34 US AQI0.4 times the WHO guideline▲967
=1467HartfordConnecticut, United States 34 US AQI0.4 times the WHO guideline▲1103
=1467SavoyIllinois, United States 34 US AQI0.4 times the WHO guideline▼197
=1467PatersonNew Jersey, United States 34 US AQI0.4 times the WHO guideline▲1022
=1467NorristownPennsylvania, United States 34 US AQI0.4 times the WHO guideline▲1079
=1467BarabooWisconsin, United States 34 US AQI0.4 times the WHO guideline▼350
=1467Santa ClaritaCalifornia, United States 34 US AQI0.4 times the WHO guideline▲107
=1467TigardOregon, United States 34 US AQI0.4 times the WHO guideline▼30
=1467VernonBritish Columbia, Canada 34 US AQI0.4 times the WHO guideline▲33
not rankedSundernNorth Rhine-Westphalia, Germany 34 US AQI0.4 times the WHO guideline
not rankedHattersheimHesse, Germany 34 US AQI0.4 times the WHO guideline
not rankedOsijekCounty of Osijek-Baranja, Croatia 34 US AQI0.4 times the WHO guideline
not rankedFindlayOhio, United States 34 US AQI0.4 times the WHO guideline
1486FujinomiyaShizuoka, Japan 34 US AQI0.4 times the WHO guideline▼1057

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).