All 3,291 cities by PM2.5, last 30 days

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 show older figures or are missing from this board, not clean.

=2264ClintonIowa, United States 32 US AQI▼120
=2264RockfordIllinois, United States 32 US AQI▼119
=2264LindenNew Jersey, United States 32 US AQI▼167
=2264SteubenvilleOhio, United States 32 US AQI▼166
=2264PittsburghPennsylvania, United States 32 US AQI▼208
=2264FlagstaffArizona, United States 32 US AQI▼165
=2264San RafaelCalifornia, United States 32 US AQI▼206
=2264Cedar Hillslast full day 11 OctUtah, United States 32 US AQI▼205
=2264Salt Lake CityUtah, United States 32 US AQI▼248
=2264Airway HeightsWashington, United States 32 US AQI▼247
=2264ToppenishWashington, United States 32 US AQI▼246
=2264DuncanBritish Columbia, Canada 32 US AQI▼201
=2264KitimatBritish Columbia, Canada 32 US AQI▼110
=2264SquamishBritish Columbia, Canada 32 US AQI▼200
=2264Strawberry HillBritish Columbia, Canada 32 US AQI▼245
=2264Val-de-ReuilNormandy, France 32 US AQI▼154
=2264MorouraSaga, Japan 32 US AQI▼197
=2264NarashinoChiba, Japan 32 US AQI▼152
=2264ShirakawaFukushima, Japan 32 US AQI▼151
=2320Yasugichōlast full day 11 OctShimane, Japan 32 US AQI▼297
=2320MatsudoChiba, Japan 32 US AQI▼203
=2320Gōtsuchōlast full day 11 OctShimane, Japan 32 US AQI▼292
=2320FujinomiyaShizuoka, Japan 32 US AQI▼112
=2320MiuraKanagawa, Japan 32 US AQI▼200
=2320YotsukaidōChiba, Japan 32 US AQI▼199
=2320Thornaby-on-TeesEngland, United Kingdom 32 US AQI
=2320NottinghamEngland, United Kingdom 32 US AQI
=2320BrightlingseaEngland, United Kingdom 32 US AQI
=2320BaselBasel-City, Switzerland 32 US AQI▼245
=2320Thalelast full day 10 OctSaxony-Anhalt, Germany 32 US AQI▼373
=2320Nordhausenlast full day 10 OctThuringia, Germany 32 US AQI
=2320Lüdenscheidlast full day 10 OctNorth Rhine-Westphalia, Germany 32 US AQI
=2320Kelsterbachlast full day 10 OctHesse, Germany 32 US AQI▼189
=2320FuldaHesse, Germany 32 US AQI▼188
=2320Villefranche-sur-SaôneAuvergne-Rhône-Alpes, France 32 US AQI▼186
=2320ValenceAuvergne-Rhône-Alpes, France 32 US AQI▼237
=2320OrléansCentre-Val de Loire, France 32 US AQI▼236
=2320Mont-de-MarsanNew Aquitaine, France 32 US AQI▼235
=2320MontbéliardBourgogne-Franche-Comté, France 32 US AQI▼143
=2320DoleBourgogne-Franche-Comté, France 32 US AQI▼182
=2320Bourg-en-BresseAuvergne-Rhône-Alpes, France 32 US AQI▼181
=2320GyöngyösHeves County, Hungary 32 US AQI▼231
=2320CookevilleTennessee, United States 32 US AQI▼177
=2320DavenportIowa, United States 32 US AQI▼133
=2320Iowa CityIowa, United States 32 US AQI▼95
=2320MuscatineIowa, United States 32 US AQI▼132
=2320East ChicagoIndiana, United States 32 US AQI▼131
=2320RochesterMinnesota, United States 32 US AQI▼224
=2320ChicoCalifornia, United States 32 US AQI▼305
=2320Bozemanlast full day 10 OctMontana, United States 32 US AQI▼217
=2320Stansbury parkUtah, United States 32 US AQI▼347
=2320BadgerAlaska, United States 32 US AQI▼168
=2320AirdrieAlberta, Canada 32 US AQI▼259
=2320LangleyBritish Columbia, Canada 32 US AQI▼213
=2320Kennedy TownshipPennsylvania, United States 32 US AQI▼163
=2356SvishtovVeliko Tarnovo, Bulgaria 31 US AQI▼287
=2356NanaoIshikawa, Japan 31 US AQI▼241
=2356KanazawaIshikawa, Japan 31 US AQI▼238
=2356GotembaShizuoka, Japan 31 US AQI▼56
=2356FujiedaShizuoka, Japan 31 US AQI▼147
=2356OmigawaChiba, Japan 31 US AQI▼192
=2356ŌamiChiba, Japan 31 US AQI▼234
=2356NarrabriNew South Wales, Australia 31 US AQI▼233
=2356GunnedahNew South Wales, Australia 31 US AQI▼232
=2356EmeraldQueensland, Australia 31 US AQI▼189
=2356CacémLisbon, Portugal 31 US AQI
=2356WakefieldEngland, United Kingdom 31 US AQI
=2356Storringtonlast full day 11 OctEngland, United Kingdom 31 US AQI▼187
=2356ReutteTyrol, Austria 31 US AQI▼227
=2356NamurWallonia, Belgium 31 US AQI▼280
=2356Habay-la-VieilleWallonia, Belgium 31 US AQI▼143
=2356Oberviechtachlast full day 10 OctBavaria, Germany 31 US AQI▼321
=2356MichelstadtHesse, Germany 31 US AQI▼226
=2356HeidelbergBaden-Wurttemberg, Germany 31 US AQI▼277
=2356Hanau am MainHesse, Germany 31 US AQI▼276
=2356DarmstadtHesse, Germany 31 US AQI▼183
=2356GalwayConnacht, Ireland 31 US AQI▼223
=2356Saint-ÉtienneAuvergne-Rhône-Alpes, France 31 US AQI▼181
=2356PerpignanOccitanie, France 31 US AQI▼220
=2356CherbourgNormandy, France 31 US AQI▼178
=2356ChartresCentre-Val de Loire, France 31 US AQI▼352
=2356AlbiOccitanie, France 31 US AQI▼216
=2356Banská BystricaBanská Bystrica Region, Slovakia 31 US AQI▼266
=2356CarralGalicia, Spain 31 US AQI▼447
=2356RijekaPrimorje-Gorski Kotar, Croatia 31 US AQI
=2356RiedstadtHesse, Germany 31 US AQI▼136
=2356JacksonvilleFlorida, United States 31 US AQI▼175
=2356Highland HeightsKentucky, United States 31 US AQI▼174
=2356DentOhio, United States 31 US AQI▼135
=2356SharonvilleOhio, United States 31 US AQI▼172
=2356JolietIllinois, United States 31 US AQI▼130
=2356Grand RapidsMichigan, United States 31 US AQI▼166
=2356LansingMichigan, United States 31 US AQI▼165
=2356Lincoln ParkMichigan, United States 31 US AQI▼164
=2356MinneapolisMinnesota, United States 31 US AQI▼261
=2356LincolnNebraska, United States 31 US AQI▼162
=2356ElizabethNew Jersey, United States 31 US AQI▼161
=2356Jefferson HillsPennsylvania, United States 31 US AQI▼160
=2356New HollandPennsylvania, United States 31 US AQI▼123
=2356SolvangCalifornia, United States 31 US AQI▼256

What stands behind each figure: Checked at 2+ sites One reference monitor Low-cost sensors 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 30 days to 14 Oct 2026, 06:00 UTC: each city's mean of its daily means, cities measured on 21 or more of the 30 days. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=30d. Ranked on low-cost sensors, with no reference monitor in the city: #1 Kasur, #2 Gujranwala, #3 Kuala Lumpur, #5 Lahore, #6 Faisalabad, #9 Peshawar and #10 Dhaka. Some values from Sensor.Community, ODbL. Some readings from Vietnam's government monitors; Aurassure; Department of Environment, Nepal; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver); 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 06:07 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; Aurassure; Department of Environment, Nepal; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).