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.

=460HitaOita, Japan 58 US AQI0.9 times the WHO guideline▼174
=460HekinanAichi, Japan 58 US AQI0.9 times the WHO guideline▼244
=460Ponggae-dongJeju-do, South Korea 58 US AQI0.9 times the WHO guideline▲492
=460NorwoodOhio, United States 58 US AQI0.9 times the WHO guideline▲105
not rankedGenevaGeneva, Switzerland 58 US AQI0.9 times the WHO guideline
not rankedEsposendeBraga, Portugal 58 US AQI0.9 times the WHO guideline
not rankedThawi WatthanaBangkok, Thailand 58 US AQI0.9 times the WHO guideline
=471KrielMpumalanga, South Africa 58 US AQI0.9 times the WHO guideline▼52
=471Jeju CityJeju-do, South Korea 58 US AQI0.9 times the WHO guideline▲209
=471JangheungJeollanam-do, South Korea 58 US AQI0.9 times the WHO guideline▲790
=471MenumaSaitama, Japan 58 US AQI0.9 times the WHO guideline
=471HikoneShiga, Japan 58 US AQI0.9 times the WHO guideline▲634
=471OregonOhio, United States 58 US AQI0.9 times the WHO guideline▲291
=471VinovoPiedmont, Italy 58 US AQI0.9 times the WHO guideline▲23
=471SeogwipoJeju-do, South Korea 58 US AQI0.9 times the WHO guideline▲610
=471OwariasahiAichi, Japan 58 US AQI0.9 times the WHO guideline▼109
not rankedBielanyMazovia, Poland 58 US AQI0.9 times the WHO guideline
not rankedParmaOhio, United States 58 US AQI0.9 times the WHO guideline
not rankedBurlingtonOntario, Canada 58 US AQI0.9 times the WHO guideline
=480TratTrat, Thailand 58 US AQI0.8 times the WHO guideline▲198
=480KitahamaShiga, Japan 58 US AQI0.8 times the WHO guideline▲1149
=480ŽilinaŽilina Region, Slovakia 58 US AQI0.8 times the WHO guideline▲170
=480KrakówLesser Poland, Poland 58 US AQI0.8 times the WHO guideline▲547
=480Sannazzaro de' BurgondiLombardy, Italy 58 US AQI0.8 times the WHO guideline
=480Novi SadVojvodina, Serbia 58 US AQI0.8 times the WHO guideline▲172
=480MeccaCalifornia, United States 58 US AQI0.8 times the WHO guideline▼66
=480Higashi-MatsuyamaSaitama, Japan 58 US AQI0.8 times the WHO guideline▼80
not rankedSylvaniaOhio, United States 58 US AQI0.8 times the WHO guideline
=488JumunjinGangwon-do, South Korea 58 US AQI0.8 times the WHO guideline▲614
=488RockhamptonQueensland, Australia 58 US AQI0.8 times the WHO guideline▲46
=488GadsdenAlabama, United States 58 US AQI0.8 times the WHO guideline▲644
=488Franklin ParkIllinois, United States 58 US AQI0.8 times the WHO guideline▲132
not rankedBan Lam Luk KaPathum Thani, Thailand 58 US AQI0.8 times the WHO guideline
=492PruszkówMazovia, Poland 57 US AQI0.8 times the WHO guideline▲629
=492ŌtsuShiga, Japan 57 US AQI0.8 times the WHO guideline▲753
=492ImabariEhime, Japan 57 US AQI0.8 times the WHO guideline▲403
=492MackayQueensland, Australia 57 US AQI0.8 times the WHO guideline▲157
=492SinanJeollanam-do, South Korea 57 US AQI0.8 times the WHO guideline▲77
=492KuwanaMie, Japan 57 US AQI0.8 times the WHO guideline▲107
not rankedVelenjeUrban Municipality of Velenje, Slovenia 57 US AQI0.8 times the WHO guideline
=498NiskoSubcarpathia, Poland 57 US AQI0.8 times the WHO guideline▲407
=498ŌmutaFukuoka, Japan 57 US AQI0.8 times the WHO guideline▼183
=498IzumoShimane, Japan 57 US AQI0.8 times the WHO guideline
=498ChigasakiKanagawa, Japan 57 US AQI0.8 times the WHO guideline▲94
=498AccraGreater Accra, Ghana 57 US AQI0.8 times the WHO guideline▼61
=498TepliceÚstí nad Labem Region, Czechia 57 US AQI0.8 times the WHO guideline▲385
=498KnjazevacCentral Serbia, Serbia 57 US AQI0.8 times the WHO guideline▲467
not rankedOstrołękaMazovia, Poland 57 US AQI0.8 times the WHO guideline
not rankedCapalabaQueensland, Australia 57 US AQI0.8 times the WHO guideline
not rankedParkvilleMaryland, United States 57 US AQI0.8 times the WHO guideline
not rankedPaşcaniIași County, Romania 57 US AQI0.8 times the WHO guideline
=505RevúcaBanská Bystrica Region, Slovakia 57 US AQI0.8 times the WHO guideline▲399
=505KusatsuShiga, Japan 57 US AQI0.8 times the WHO guideline▲620
=505Calumet CityIllinois, United States 57 US AQI0.8 times the WHO guideline▲197
=505Oak LawnIllinois, United States 57 US AQI0.8 times the WHO guideline▲437
=505AyaseKanagawa, Japan 57 US AQI0.8 times the WHO guideline▲285
not rankedBełchatówŁódź Voivodeship, Poland 57 US AQI0.8 times the WHO guideline
not rankedWest ChicagoIllinois, United States 57 US AQI0.8 times the WHO guideline
=510ToyotaAichi, Japan 57 US AQI0.8 times the WHO guideline
=510HonjōSaitama, Japan 57 US AQI0.8 times the WHO guideline▼114
=510OstravaMoravian-Silesian Region, Czechia 57 US AQI0.8 times the WHO guideline▲337
=510TulancingoHidalgo, Mexico 57 US AQI0.8 times the WHO guideline▲54
=510SaltilloCoahuila, Mexico 57 US AQI0.8 times the WHO guideline
=510NewmarketOntario, Canada 57 US AQI0.8 times the WHO guideline▲377
not rankedPristinaPristina, Kosovo 57 US AQI0.8 times the WHO guideline
not rankedSchweinfurtBavaria, Germany 57 US AQI0.8 times the WHO guideline
not rankedFort ThomasKentucky, United States 57 US AQI0.8 times the WHO guideline
not rankedWest ChesterPennsylvania, United States 57 US AQI0.8 times the WHO guideline
not rankedBowling GreenOhio, United States 57 US AQI0.8 times the WHO guideline
not rankedKenoshaWisconsin, United States 57 US AQI0.8 times the WHO guideline
=516QuettaBalochistan, Pakistan 57 US AQI0.8 times the WHO guideline▼338
=516HraniceOlomouc Region, Czechia 57 US AQI0.8 times the WHO guideline▲390
=516GdyniaPomerania, Poland 57 US AQI0.8 times the WHO guideline▲1594
=516CotaCundinamarca, Colombia 57 US AQI0.8 times the WHO guideline
=516KnoxvilleTennessee, United States 57 US AQI0.8 times the WHO guideline▲697
=516BrookfieldIllinois, United States 57 US AQI0.8 times the WHO guideline▲69
not rankedKotsyubynskeKyiv Oblast, Ukraine 57 US AQI0.8 times the WHO guideline
not rankedSonnebergThuringia, Germany 57 US AQI0.8 times the WHO guideline
not rankedTriesteFriuli Venezia Giulia, Italy 57 US AQI0.8 times the WHO guideline
=522ChanthaburiChanthaburi, Thailand 56 US AQI0.8 times the WHO guideline▲521
=522SōjaOkayama, Japan 56 US AQI0.8 times the WHO guideline▲288
=522KōnosuSaitama, Japan 56 US AQI0.8 times the WHO guideline▼42
=522JihlavaVysocina, Czechia 56 US AQI0.8 times the WHO guideline▲504
=522São José do Rio PretoSão Paulo, Brazil 56 US AQI0.8 times the WHO guideline▲108
=522PennsaukenNew Jersey, United States 56 US AQI0.8 times the WHO guideline▲1726
=522DaytonOhio, United States 56 US AQI0.8 times the WHO guideline▲150
=522LincolnwoodIllinois, United States 56 US AQI0.8 times the WHO guideline▲237
not rankedNorth BergenNew Jersey, United States 56 US AQI0.8 times the WHO guideline
=530LegionowoMazovia, Poland 56 US AQI0.8 times the WHO guideline▲729
=530SanzhiTaipei, Taiwan 56 US AQI0.8 times the WHO guideline▼207
=530TsurugaFukui, Japan 56 US AQI0.8 times the WHO guideline▲804
=530NaganoNagano, Japan 56 US AQI0.8 times the WHO guideline▲75
=530KoshigayaSaitama, Japan 56 US AQI0.8 times the WHO guideline▲211
=530Gold CoastQueensland, Australia 56 US AQI0.8 times the WHO guideline▼214
=530TemaGreater Accra, Ghana 56 US AQI0.8 times the WHO guideline▲26
=530BerounCentral Bohemia, Czechia 56 US AQI0.8 times the WHO guideline▲899
=530NapervilleIllinois, United States 56 US AQI0.8 times the WHO guideline▲319
=530Fort WayneIndiana, United States 56 US AQI0.8 times the WHO guideline▼225
=530WestervilleOhio, United States 56 US AQI0.8 times the WHO guideline▲304
=530FresnoCalifornia, United States 56 US AQI0.8 times the WHO guideline▲234

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.

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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 2026-10-14 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).