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 rankedSzigetszentmiklósPest County, Hungary 45 US AQI0.5 times the WHO guideline
not rankedAlexandriaVirginia, United States 45 US AQI0.5 times the WHO guideline
=1099ŁomiankiMazovia, Poland 44 US AQI0.5 times the WHO guideline
=1099UlmBaden-Wurttemberg, Germany 44 US AQI0.5 times the WHO guideline▲566
=1099GießenHesse, Germany 44 US AQI0.5 times the WHO guideline▲199
=1099EsztergomKomárom-Esztergom, Hungary 44 US AQI0.5 times the WHO guideline▼43
=1099SlatinaSouth Moravian, Czechia 44 US AQI0.5 times the WHO guideline▼298
=1099LjubljanaLjubljana, Slovenia 44 US AQI0.5 times the WHO guideline▲783
=1099HernandoMississippi, United States 44 US AQI0.5 times the WHO guideline▼143
=1099DentOhio, United States 44 US AQI0.5 times the WHO guideline▲154
=1099CookevilleTennessee, United States 44 US AQI0.5 times the WHO guideline▲279
=1099HendersonvilleTennessee, United States 44 US AQI0.5 times the WHO guideline▲192
=1099Fort LeeNew Jersey, United States 44 US AQI0.5 times the WHO guideline
=1099JohnstownPennsylvania, United States 44 US AQI0.5 times the WHO guideline▲894
=1099Alta SierraCalifornia, United States 44 US AQI0.5 times the WHO guideline▼313
=1099AnaheimCalifornia, United States 44 US AQI0.5 times the WHO guideline▲422
=1099Long BeachCalifornia, United States 44 US AQI0.5 times the WHO guideline▲474
=1099EurekaCalifornia, United States 44 US AQI0.5 times the WHO guideline▼502
=1099SodegauraChiba, Japan 44 US AQI0.5 times the WHO guideline▲230
not rankedUithoornNorth Holland, The Netherlands 44 US AQI0.5 times the WHO guideline
not rankedRibnitz-DamgartenMecklenburg-Vorpommern, Germany 44 US AQI0.5 times the WHO guideline
not rankedSarregueminesGrand Est, France 44 US AQI0.5 times the WHO guideline
not rankedOpavaMoravian-Silesian Region, Czechia 44 US AQI0.5 times the WHO guideline
not rankedRiehenBasel-City, Switzerland 44 US AQI0.5 times the WHO guideline
not rankedLandoverMaryland, United States 44 US AQI0.5 times the WHO guideline
not rankedMaldenMassachusetts, United States 44 US AQI0.5 times the WHO guideline
=1116ToyonakaOsaka, Japan 44 US AQI0.5 times the WHO guideline▲236
=1116ImaichiTochigi, Japan 44 US AQI0.5 times the WHO guideline▼66
=1116HeilbronnBaden-Wurttemberg, Germany 44 US AQI0.5 times the WHO guideline▲325
=1116AhausNorth Rhine-Westphalia, Germany 44 US AQI0.5 times the WHO guideline
=1116GalwayConnacht, Ireland 44 US AQI0.5 times the WHO guideline▲1072
=1116Fontaine-lès-DijonBourgogne-Franche-Comté, France 44 US AQI0.5 times the WHO guideline▲311
=1116CherbourgNormandy, France 44 US AQI0.5 times the WHO guideline▲1283
=1116NitraNitra Region, Slovakia 44 US AQI0.5 times the WHO guideline▲376
=1116PaulíniaSão Paulo, Brazil 44 US AQI0.5 times the WHO guideline▼209
=1116DecaturIllinois, United States 44 US AQI0.5 times the WHO guideline▼342
=1116East Saint LouisIllinois, United States 44 US AQI0.5 times the WHO guideline▼194
=1116MonroeLouisiana, United States 44 US AQI0.5 times the WHO guideline▼86
=1116DurhamNorth Carolina, United States 44 US AQI0.5 times the WHO guideline▲1258
=1116LebanonOhio, United States 44 US AQI0.5 times the WHO guideline▲96
=1116PhiladelphiaPennsylvania, United States 44 US AQI0.5 times the WHO guideline▲1342
=1116Saint AndrewsSouth Carolina, United States 44 US AQI0.5 times the WHO guideline▲872
=1116SalemVirginia, United States 44 US AQI0.5 times the WHO guideline▲1526
=1116Mission ViejoCalifornia, United States 44 US AQI0.5 times the WHO guideline▲478
=1116St. CatharinesOntario, Canada 44 US AQI0.5 times the WHO guideline▲341
not rankedCape CoastCentral, Ghana 44 US AQI0.5 times the WHO guideline
not rankedHavertownPennsylvania, United States 44 US AQI0.5 times the WHO guideline
=1135HumennéPrešov Region, Slovakia 43 US AQI0.5 times the WHO guideline▲368
=1135NorthamptonEngland, United Kingdom 43 US AQI0.5 times the WHO guideline
=1135Marburg an der LahnHesse, Germany 43 US AQI0.5 times the WHO guideline▲329
=1135Limburg an der LahnHesse, Germany 43 US AQI0.5 times the WHO guideline▲235
=1135Frankfurt am MainHesse, Germany 43 US AQI0.5 times the WHO guideline▲179
=1135MarseilleProvence-Alpes-Côte d'Azur, France 43 US AQI0.5 times the WHO guideline▲276
=1135Frýdek-MístekMoravian-Silesian Region, Czechia 43 US AQI0.5 times the WHO guideline▼588
=1135OmegnaPiedmont, Italy 43 US AQI0.5 times the WHO guideline▲84
=1135São PauloSão Paulo, Brazil 43 US AQI0.5 times the WHO guideline▲132
=1135Ciudad JuárezChihuahua, Mexico 43 US AQI0.5 times the WHO guideline▼41
=1135Bonita SpringsFlorida, United States 43 US AQI0.5 times the WHO guideline▲117
=1135LexingtonNorth Carolina, United States 43 US AQI0.5 times the WHO guideline▲1322
=1135HighlandsTexas, United States 43 US AQI0.5 times the WHO guideline▼212
=1135Wells BranchTexas, United States 43 US AQI0.5 times the WHO guideline▲187
=1135BrocktonMassachusetts, United States 43 US AQI0.5 times the WHO guideline▲1267
=1135BridgevillePennsylvania, United States 43 US AQI0.5 times the WHO guideline▲1028
=1135WyomissingPennsylvania, United States 43 US AQI0.5 times the WHO guideline▲1199
=1135Weirton HeightsWest Virginia, United States 43 US AQI0.5 times the WHO guideline▲980
=1135Redwood CityCalifornia, United States 43 US AQI0.5 times the WHO guideline▼154
=1135Minami-AlpsYamanashi, Japan 43 US AQI0.5 times the WHO guideline▼684
not rankedAbovyanKotayk, Armenia 43 US AQI0.5 times the WHO guideline
not rankedBad Neuenahr-AhrweilerRheinland-Pfalz, Germany 43 US AQI0.5 times the WHO guideline
not rankedCastelfranco EmiliaEmilia-Romagna, Italy 43 US AQI0.5 times the WHO guideline
not rankedTegucigalpaFrancisco Morazán Department, Honduras 43 US AQI0.5 times the WHO guideline
not rankedNew LenoxIllinois, United States 43 US AQI0.5 times the WHO guideline
not rankedGardenaCalifornia, United States 43 US AQI0.5 times the WHO guideline
=1155BlackpoolEngland, United Kingdom 43 US AQI0.5 times the WHO guideline▲996
=1155DoetinchemGelderland, The Netherlands 43 US AQI0.5 times the WHO guideline▲201
=1155SchwazTyrol, Austria 43 US AQI0.5 times the WHO guideline▲600
=1155LongfordLeinster, Ireland 43 US AQI0.5 times the WHO guideline▲1195
=1155LyonAuvergne-Rhône-Alpes, France 43 US AQI0.5 times the WHO guideline▲433
=1155GdańskPomerania, Poland 43 US AQI0.5 times the WHO guideline▲982
=1155Kendale LakesFlorida, United States 43 US AQI0.5 times the WHO guideline▼21
=1155BaltimoreMaryland, United States 43 US AQI0.5 times the WHO guideline▲1171
=1155MurraysvilleNorth Carolina, United States 43 US AQI0.5 times the WHO guideline▼124
=1155RoanokeVirginia, United States 43 US AQI0.5 times the WHO guideline▲1479
=1155WaterlooIowa, United States 43 US AQI0.5 times the WHO guideline▼121
=1155EwingNew Jersey, United States 43 US AQI0.5 times the WHO guideline
=1155State CollegePennsylvania, United States 43 US AQI0.5 times the WHO guideline▲1098
=1155San LeandroCalifornia, United States 43 US AQI0.5 times the WHO guideline▼421
=1155PortlandOregon, United States 43 US AQI0.5 times the WHO guideline▲84
=1155RentonWashington, United States 43 US AQI0.5 times the WHO guideline▲102
not rankedPlevenPleven, Bulgaria 43 US AQI0.5 times the WHO guideline
not rankedNova PazovaVojvodina, Serbia 43 US AQI0.5 times the WHO guideline
not rankedBoomFlanders, Belgium 43 US AQI0.5 times the WHO guideline
not rankedBerkel en RodenrijsSouth Holland, The Netherlands 43 US AQI0.5 times the WHO guideline
=1171KochaniKochani, North Macedonia 42 US AQI0.5 times the WHO guideline▲1004
=1171YonezawaYamagata, Japan 42 US AQI0.5 times the WHO guideline▼414
=1171SendaiMiyagi, Japan 42 US AQI0.5 times the WHO guideline▼202
=1171PlymouthEngland, United Kingdom 42 US AQI0.5 times the WHO guideline▲699
=1171PayerneVaud, Switzerland 42 US AQI0.5 times the WHO guideline▲215
=1171RothBavaria, Germany 42 US AQI0.5 times the WHO guideline
=1171NancyGrand Est, France 42 US AQI0.5 times the WHO guideline▲95

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).