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 rankedŁowiczŁódź Voivodeship, Poland 56 US AQI0.8 times the WHO guideline
not rankedBlacksburgVirginia, United States 56 US AQI0.8 times the WHO guideline
=542WawerMazovia, Poland 56 US AQI0.8 times the WHO guideline▲838
=542KrosnoSubcarpathia, Poland 56 US AQI0.8 times the WHO guideline▲70
=542JasłoSubcarpathia, Poland 56 US AQI0.8 times the WHO guideline▼47
=542BelgradeCentral Serbia, Serbia 56 US AQI0.8 times the WHO guideline▲58
=542PattaniPattani, Thailand 56 US AQI0.8 times the WHO guideline▼26
=542UbeYamaguchi, Japan 56 US AQI0.8 times the WHO guideline▼32
=542KōtariKyoto, Japan 56 US AQI0.8 times the WHO guideline▲811
=542IchinomiyaAichi, Japan 56 US AQI0.8 times the WHO guideline▲301
=542StudénkaMoravian-Silesian Region, Czechia 56 US AQI0.8 times the WHO guideline▲567
=542ŻaryLubusz, Poland 56 US AQI0.8 times the WHO guideline▲1101
=542Ciudad Benito JuárezNuevo León, Mexico 56 US AQI0.8 times the WHO guideline
=542New OrleansLouisiana, United States 56 US AQI0.8 times the WHO guideline▲324
=542ToledoOhio, United States 56 US AQI0.8 times the WHO guideline▲79
=542Misato, SaitamaSaitama, Japan 56 US AQI0.8 times the WHO guideline▲68
not rankedWoosterOhio, United States 56 US AQI0.8 times the WHO guideline
=556UjiKyoto, Japan 56 US AQI0.8 times the WHO guideline▲777
=556TakamatsuKagawa, Japan 56 US AQI0.8 times the WHO guideline▲140
=556IshinomakiMiyagi, Japan 56 US AQI0.8 times the WHO guideline▼57
=556WrocławLower Silesia, Poland 56 US AQI0.8 times the WHO guideline▲110
=556HattiesburgMississippi, United States 56 US AQI0.8 times the WHO guideline▲28
=556ScrantonPennsylvania, United States 56 US AQI0.8 times the WHO guideline▲1408
=556GotōNagasaki, Japan 56 US AQI0.8 times the WHO guideline▲252
not rankedDunaharasztiPest County, Hungary 56 US AQI0.8 times the WHO guideline
not rankedArlington HeightsIllinois, United States 56 US AQI0.8 times the WHO guideline
not rankedEtobicokeOntario, Canada 56 US AQI0.8 times the WHO guideline
=563NiihamaEhime, Japan 56 US AQI0.8 times the WHO guideline▲134
=563FukuroiShizuoka, Japan 56 US AQI0.8 times the WHO guideline▼202
=563TownsvilleQueensland, Australia 56 US AQI0.8 times the WHO guideline▲604
=563AnnecyAuvergne-Rhône-Alpes, France 56 US AQI0.8 times the WHO guideline▲778
=563Tula de AllendeHidalgo, Mexico 56 US AQI0.8 times the WHO guideline▲106
=563MiddlesboroKentucky, United States 56 US AQI0.8 times the WHO guideline▲726
=563Baton RougeLouisiana, United States 56 US AQI0.8 times the WHO guideline▲302
=563ColumbusOhio, United States 56 US AQI0.8 times the WHO guideline▲394
=563TsuchiuraIbaraki, Japan 56 US AQI0.8 times the WHO guideline▲158
=563JōetsuNiigata, Japan 56 US AQI0.8 times the WHO guideline▲94
not rankedRyazan’Ryazan Oblast, Russia 56 US AQI0.8 times the WHO guideline
not rankedMezőtúrJász-Nagykun-Szolnok, Hungary 56 US AQI0.8 times the WHO guideline
not rankedZweibrückenRheinland-Pfalz, Germany 56 US AQI0.8 times the WHO guideline
not rankedSaluzzoPiedmont, Italy 56 US AQI0.8 times the WHO guideline
=573OkayamaOkayama, Japan 55 US AQI0.8 times the WHO guideline
=573HavířovMoravian-Silesian Region, Czechia 55 US AQI0.8 times the WHO guideline▼89
=573LawrencevilleGeorgia, United States 55 US AQI0.8 times the WHO guideline▲746
=573WheatonIllinois, United States 55 US AQI0.8 times the WHO guideline▼7
=573HollandMichigan, United States 55 US AQI0.8 times the WHO guideline▲113
=573Barra da TijucaRio de Janeiro, Brazil 55 US AQI0.8 times the WHO guideline▲730
=573Tannum SandsQueensland, Australia 55 US AQI0.8 times the WHO guideline▼123
=573HigashikurumeTokyo, Japan 55 US AQI0.8 times the WHO guideline▲85
not rankedPushkinSt.-Petersburg, Russia 55 US AQI0.8 times the WHO guideline
not rankedKokhmaIvanovo Oblast, Russia 55 US AQI0.8 times the WHO guideline
not rankedTakoradiWestern, Ghana 55 US AQI0.8 times the WHO guideline
not rankedYverdon-les-BainsVaud, Switzerland 55 US AQI0.8 times the WHO guideline
=581BitolaBitola, North Macedonia 55 US AQI0.8 times the WHO guideline▲368
=581SeosanChungcheongnam-do, South Korea 55 US AQI0.8 times the WHO guideline▼376
=581Narutochō-mitsuishiTokushima, Japan 55 US AQI0.8 times the WHO guideline▲188
=581KawagoeSaitama, Japan 55 US AQI0.8 times the WHO guideline▲81
=581ŌmihachimanShiga, Japan 55 US AQI0.8 times the WHO guideline▲665
=581AmbergBavaria, Germany 55 US AQI0.8 times the WHO guideline▲845
=581LouisvilleKentucky, United States 55 US AQI0.8 times the WHO guideline▲2
=581WyomingMichigan, United States 55 US AQI0.8 times the WHO guideline▼14
=581LancasterPennsylvania, United States 55 US AQI0.8 times the WHO guideline▲1353
not rankedTernopilTernopil, Ukraine 55 US AQI0.8 times the WHO guideline
=590GaigeturiJeju-do, South Korea 55 US AQI0.8 times the WHO guideline▲429
=590ChiryūAichi, Japan 55 US AQI0.8 times the WHO guideline▼337
=590GladstoneQueensland, Australia 55 US AQI0.8 times the WHO guideline▼100
=590Ústí nad LabemÚstí nad Labem Region, Czechia 55 US AQI0.8 times the WHO guideline▲802
=590FairhopeAlabama, United States 55 US AQI0.8 times the WHO guideline▲467
=590AugustaGeorgia, United States 55 US AQI0.8 times the WHO guideline▲807
=590MolineIllinois, United States 55 US AQI0.8 times the WHO guideline▲485
not rankedJablonec nad NisouLiberec Region, Czechia 55 US AQI0.8 times the WHO guideline
not rankedConcordNorth Carolina, United States 55 US AQI0.8 times the WHO guideline
=597CiechanówMazovia, Poland 55 US AQI0.7 times the WHO guideline▲753
=597CenturionGauteng, South Africa 55 US AQI0.7 times the WHO guideline▼131
=597AranyaprathetSa Kaeo, Thailand 55 US AQI0.7 times the WHO guideline▲109
=597JangseongJeollanam-do, South Korea 55 US AQI0.7 times the WHO guideline▲603
=597KurayoshiTottori, Japan 55 US AQI0.7 times the WHO guideline▲529
=597Seongnam-siGyeonggi-do, South Korea 55 US AQI0.7 times the WHO guideline▼309
=597EdenderryLeinster, Ireland 55 US AQI0.7 times the WHO guideline▲941
=597DouglasGeorgia, United States 55 US AQI0.7 times the WHO guideline▲721
=597BristolVirginia, United States 55 US AQI0.7 times the WHO guideline▲1393
=597ChicagoIllinois, United States 55 US AQI0.7 times the WHO guideline▲380
=597NorthbrookIllinois, United States 55 US AQI0.7 times the WHO guideline▲163
=597HigashigōSaga, Japan 55 US AQI0.7 times the WHO guideline▼328
not rankedMasonOhio, United States 55 US AQI0.7 times the WHO guideline
=609YangjuGyeonggi-do, South Korea 55 US AQI0.7 times the WHO guideline▼313
=609NagoyaAichi, Japan 55 US AQI0.7 times the WHO guideline▼130
=609KumagawaFukui, Japan 55 US AQI0.7 times the WHO guideline▲400
=609Fukui-shiFukui, Japan 55 US AQI0.7 times the WHO guideline▲459
=609ZnojmoSouth Moravian, Czechia 55 US AQI0.7 times the WHO guideline▲255
=609RacibórzSilesia, Poland 55 US AQI0.7 times the WHO guideline▲609
=609AcariRio de Janeiro, Brazil 55 US AQI0.7 times the WHO guideline▲464
=609Little RockArkansas, United States 55 US AQI0.7 times the WHO guideline▼1
=609ColumbusGeorgia, United States 55 US AQI0.7 times the WHO guideline▲299
=609CincinnatiOhio, United States 55 US AQI0.7 times the WHO guideline▲175
=609SharonvilleOhio, United States 55 US AQI0.7 times the WHO guideline▲331
=609KotōKumamoto, Japan 55 US AQI0.7 times the WHO guideline▼297
not rankedDillingen an der DonauBavaria, Germany 55 US AQI0.7 times the WHO guideline
not rankedSiemianowice ŚląskieSilesia, Poland 55 US AQI0.7 times the WHO guideline
not rankedGnieznoGreater Poland, Poland 55 US AQI0.7 times the WHO guideline

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).