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.

=3186HonoluluHawaii, United States 18 US AQI▼343
=3186PeterboroughOntario, Canada 18 US AQI▼329
=3203Saint-DenisReunion, Reunion 18 US AQI▼357
=3203EupenWallonia, Belgium 18 US AQI▼386
=3203North ChicopeeMassachusetts, United States 18 US AQI▼344
=3203Newburghlast full day 11 OctNew York, United States 18 US AQI▼352
=3203BenningtonVermont, United States 18 US AQI▼351
=3203AlamosaColorado, United States 18 US AQI▼377
=3203FairbanksAlaska, United States 18 US AQI▼338
=3203North CowichanBritish Columbia, Canada 18 US AQI▼359
=3211Narvalast full day 10 OctIda-Virumaa, Estonia 17 US AQI▼366
=3211SakaiminatoTottori, Japan 17 US AQI▼340
=3211Newton AbbotEngland, United Kingdom 17 US AQI
=3211ÖrnsköldsvikVästernorrland, Sweden 17 US AQI
=3211HamoisWallonia, Belgium 17 US AQI▼376
=3211RockvilleMaryland, United States 17 US AQI▼327
=3211LewistonMaine, United States 17 US AQI▼350
=3211Casas AdobesArizona, United States 17 US AQI▼358
=3211CheneyWashington, United States 17 US AQI▼380
=3211Fort McMurrayAlberta, Canada 17 US AQI▼357
=3211FrederictonNew Brunswick, Canada 17 US AQI▼356
=3211MonctonNew Brunswick, Canada 17 US AQI▼355
=3211Grand CentreAlberta, Canada 17 US AQI▼353
=3224JyväskyläCentral Finland, Finland 17 US AQI▼354
=3224AlicanteValencia, Spain 17 US AQI▼342
=3224InvernessScotland, United Kingdom 17 US AQI
=3224CambridgeMaryland, United States 17 US AQI▼341
=3224BangorMaine, United States 17 US AQI▼364
=3224AltoonaPennsylvania, United States 17 US AQI▼352
=3224Green ValleyArizona, United States 17 US AQI▼351
=3224Big Bear CityCalifornia, United States 17 US AQI▼350
=3224TaosNew Mexico, United States 17 US AQI▼362
=3224Boulder CityNevada, United States 17 US AQI▼348
=3224MesquiteNevada, United States 17 US AQI▼361
=3224Steamboat SpringsColorado, United States 17 US AQI▼360
=3224KentvilleNova Scotia, Canada 17 US AQI▼357
=3224Parry SoundOntario, Canada 17 US AQI▼345
=3224Port WallaceNova Scotia, Canada 17 US AQI▼356
=3224Oxon Hill-GlassmanorMaryland, United States 17 US AQI▼355
=3240Cañon CityColorado, United States 16 US AQI▼365
=3240CorvallisOregon, United States 16 US AQI▼354
=3240DallasOregon, United States 16 US AQI▼353
=3240RivertonWyoming, United States 16 US AQI▼363
=3240PalmerAlaska, United States 16 US AQI▼374
=3240CharlottetownPrince Edward Island, Canada 16 US AQI▼362
=3240Rouyn-NorandaQuebec, Canada 16 US AQI▼351
=3240Sydneylast full day 11 OctNova Scotia, Canada 16 US AQI▼350
=3248TamperePirkanmaa, Finland 16 US AQI▼367
=3248PenicuikScotland, United Kingdom 16 US AQI
=3248AberdeenSouth Dakota, United States 16 US AQI▼357
=3248AspenColorado, United States 16 US AQI▼356
=3248RedmondOregon, United States 16 US AQI▼355
=3248Hawaiian Paradise ParkHawaii, United States 16 US AQI▼354
=3248MiramichiNew Brunswick, Canada 16 US AQI▼360
=3248Sault Ste. MarieOntario, Canada 16 US AQI▼353
=3256Tallinnlast full day 10 OctHarjumaa, Estonia 15 US AQI▼376
=3256Kohtla-Järvelast full day 9 OctIda-Virumaa, Estonia 15 US AQI▼352
=3256KuopioNorth Savo, Finland 15 US AQI▼360
=3256Mount Ivylast full day 11 OctNew York, United States 15 US AQI▼358
=3256GreenOregon, United States 15 US AQI▼357
=3256NewportOregon, United States 15 US AQI▼356
=3256AnacortesWashington, United States 15 US AQI▼355
=3256CodyWyoming, United States 15 US AQI▼354
=3264SaltashEngland, United Kingdom 14 US AQI
=3264BertrixWallonia, Belgium 14 US AQI▼367
=3264ReykjavíkCapital Region, Iceland 14 US AQI▼357
=3264South LaurelMaryland, United States 14 US AQI▼359
=3264White Plainslast full day 11 OctNew York, United States 14 US AQI▼358
=3264RanchettesWyoming, United States 14 US AQI▼361
=3270MiddletonWisconsin, United States 14 US AQI
=3270HavreMontana, United States 14 US AQI▼362
=3270RawlinsWyoming, United States 14 US AQI▼361
=3273HortaAzores, Portugal 13 US AQI
=3273Rock SpringsWyoming, United States 13 US AQI▼363
=3275DerryNorthern Ireland, United Kingdom 13 US AQI
=3275Angra do HeroísmoAzores, Portugal 13 US AQI
=3275WorlandWyoming, United States 13 US AQI▼359
=3275West GreenwichRhode Island, United States 13 US AQI▼362
=3279ÖstersundJämtland, Sweden 12 US AQI
=3279CouvinWallonia, Belgium 12 US AQI▼365
=3279LaconiaNew Hampshire, United States 12 US AQI▼368
=3279LaramieWyoming, United States 12 US AQI▼364
3283LanderWyoming, United States 12 US AQI▼366
=3284GarðabærCapital Region, Iceland 11 US AQI▼364
=3284Brookingslast full day 8 OctOregon, United States 11 US AQI▼366
3286Petite-ÎleReunion, Reunion 11 US AQI
3287Labrador CityNewfoundland and Labrador, Canada 10 US AQI▼368
3288UmeåVästerbotten, Sweden 9 US AQI
=3289Sweet HomeOregon, United States 7 US AQI▼368
=3289Ponta DelgadaAzores, Portugal 7 US AQI
3291YellowknifeNorthwest Territories, Canada 5 US AQI▼369

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).