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.

=2980MesaArizona, United States 23 US AQI▼308
=2980LamarColorado, United States 23 US AQI▼334
=2980Gardnerville RanchosNevada, United States 23 US AQI▼306
=2980Idaho FallsIdaho, United States 23 US AQI▼332
=2980BeavertonOregon, United States 23 US AQI▼304
=2980Grants PassOregon, United States 23 US AQI▼303
=2980HillsboroOregon, United States 23 US AQI▼280
=2980MilwaukieOregon, United States 23 US AQI▼257
=2980PendletonOregon, United States 23 US AQI▼329
=2980SilvertonOregon, United States 23 US AQI▼302
=2980QuincyWashington, United States 23 US AQI▼354
=2980SpokaneWashington, United States 23 US AQI▼326
=2980WenatcheeWashington, United States 23 US AQI▼352
=2980KahuluiHawaii, United States 23 US AQI▼297
=2980SarniaOntario, Canada 23 US AQI▼274
=2980Trois-RivièresQuebec, Canada 23 US AQI▼324
=2980Saint-GeorgesQuebec, Canada 23 US AQI▼321
=3018Castelló de la PlanaValencia, Spain 23 US AQI▼417
=3018Market DeepingEngland, United Kingdom 23 US AQI
=3018HonitonEngland, United Kingdom 23 US AQI
=3018ChristchurchEngland, United Kingdom 23 US AQI
=3018BarnstapleEngland, United Kingdom 23 US AQI
=3018Waldfischbach-Burgalbenlast full day 10 OctRheinland-Pfalz, Germany 23 US AQI▼385
=3018ColmarGrand Est, France 23 US AQI
=3018SamaAsturias, Spain 23 US AQI▼476
=3018BenicàssimValencia, Spain 23 US AQI▼440
=3018BergenVestland, Norway 23 US AQI
=3018Rabo de PeixeAzores, Portugal 23 US AQI
=3018GlasgowDelaware, United States 23 US AQI▼305
=3018MarvinNorth Carolina, United States 23 US AQI▼304
=3018DanburyConnecticut, United States 23 US AQI▼325
=3018HartfordConnecticut, United States 23 US AQI▼324
=3018La VistaNebraska, United States 23 US AQI▼280
=3018BethlehemPennsylvania, United States 23 US AQI▼300
=3018EriePennsylvania, United States 23 US AQI▼299
=3018BarabooWisconsin, United States 23 US AQI▼297
=3018Colorado SpringsColorado, United States 23 US AQI▼345
=3018North ValleyNew Mexico, United States 23 US AQI▼320
=3018MoabUtah, United States 23 US AQI▼319
=3018PrestonIdaho, United States 23 US AQI▼343
=3018PrinevilleOregon, United States 23 US AQI▼317
=3018RoseburgOregon, United States 23 US AQI▼316
=3018AberdeenWashington, United States 23 US AQI▼339
=3018BellevueWashington, United States 23 US AQI▼338
=3018EllensburgWashington, United States 23 US AQI▼366
=3018FinleyWashington, United States 23 US AQI▼365
=3018Liberty LakeWashington, United States 23 US AQI▼336
=3018MississaugaOntario, Canada 23 US AQI▼290
=3018Münstertal/SchwarzwaldBaden-Wurttemberg, Germany 23 US AQI▼360
=3018MizunashiFukushima, Japan 23 US AQI▼288
=3051LappeenrantaSouth Karelia, Finland 22 US AQI▼366
=3051BurwellEngland, United Kingdom 22 US AQI
=3051ChampionWallonia, Belgium 22 US AQI▼388
=3051AnsWallonia, Belgium 22 US AQI▼342
=3051HalfwayMaryland, United States 22 US AQI▼360
=3051BostonMassachusetts, United States 22 US AQI▼317
=3051QuincyMassachusetts, United States 22 US AQI▼315
=3051New BrunswickNew Jersey, United States 22 US AQI▼334
=3051Rochesterlast full day 11 OctNew York, United States 22 US AQI▼356
=3051VacavilleCalifornia, United States 22 US AQI▼310
=3051FairwoodWashington, United States 22 US AQI▼370
=3051SheltonWashington, United States 22 US AQI▼327
=3051KīheiHawaii, United States 22 US AQI▼326
=3051BécancourQuebec, Canada 22 US AQI▼346
=3051Campbell RiverBritish Columbia, Canada 22 US AQI▼305
=3051Greater SudburyOntario, Canada 22 US AQI▼324
=3051Tri-CitiesWashington, United States 22 US AQI▼344
=3068LohjaUusimaa, Finland 22 US AQI▼337
=3068ShrewsburyEngland, United Kingdom 22 US AQI
=3068MiddlesbroughEngland, United Kingdom 22 US AQI
=3068EdinburghScotland, United Kingdom 22 US AQI
=3068AberdeenScotland, United Kingdom 22 US AQI
=3068ÖrebroÖrebro, Sweden 22 US AQI▼299
=3068GroßalmerodeHesse, Germany 22 US AQI▼381
=3068SwordsLeinster, Ireland 22 US AQI
=3068NaasLeinster, Ireland 22 US AQI▼358
=3068GreystonesLeinster, Ireland 22 US AQI▼357
=3068OviedoAsturias, Spain 22 US AQI▼1160
=3068ShannonMunster, Ireland 22 US AQI▼356
=3068TelfordEngland, United Kingdom 22 US AQI
=3068LowellMassachusetts, United States 22 US AQI▼333
=3068VirginiaMinnesota, United States 22 US AQI▼331
=3068West FargoNorth Dakota, United States 22 US AQI▼352
=3068Syracuselast full day 11 OctNew York, United States 22 US AQI▼329
=3068WatertownSouth Dakota, United States 22 US AQI▼348
=3068Casa GrandeArizona, United States 22 US AQI▼328
=3068Las CrucesNew Mexico, United States 22 US AQI▼326
=3068BendOregon, United States 22 US AQI▼325
=3068Coos BayOregon, United States 22 US AQI▼287
=3068North PortlandOregon, United States 22 US AQI▼324
=3068Heber CityUtah, United States 22 US AQI▼365
=3068MeadWashington, United States 22 US AQI▼364
=3068Port TownsendWashington, United States 22 US AQI▼323
=3068GranbyQuebec, Canada 22 US AQI▼342
=3095DunedinOtago, New Zealand 21 US AQI▼261
=3095KüssnachtSchwyz, Switzerland 21 US AQI▼363
=3095SundsvallVästernorrland, Sweden 21 US AQI▼344
=3095KarlstadVärmland, Sweden 21 US AQI▼362
=3095Netphenlast full day 10 OctNorth Rhine-Westphalia, Germany 21 US AQI
=3095GlashüttenHesse, Germany 21 US AQI▼343

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).