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.

=3095KeeneNew Hampshire, United States 21 US AQI▼338
=3095Holbrooklast full day 11 OctNew York, United States 21 US AQI▼337
=3095NorristownPennsylvania, United States 21 US AQI▼318
=3095PuebloColorado, United States 21 US AQI▼373
=3095Carson CityNevada, United States 21 US AQI▼316
=3095BellevilleOntario, Canada 21 US AQI▼333
=3095Fort St. JohnBritish Columbia, Canada 21 US AQI▼348
=3095Grande PrairieAlberta, Canada 21 US AQI▼330
=3095Port AlberniBritish Columbia, Canada 21 US AQI▼329
=3095Williams LakeBritish Columbia, Canada 21 US AQI▼328
=3095EdertalHesse, Germany 21 US AQI▼387
=3112PoriSatakunta, Finland 21 US AQI▼362
=3112KamaishiIwate, Japan 21 US AQI▼330
=3112BrayLeinster, Ireland 21 US AQI▼359
=3112Palm BayFlorida, United States 21 US AQI▼341
=3112LynnMassachusetts, United States 21 US AQI▼340
=3112North AdamsMassachusetts, United States 21 US AQI▼326
=3112PortlandMaine, United States 21 US AQI▼357
=3112CloquetMinnesota, United States 21 US AQI▼338
=3112DuluthMinnesota, United States 21 US AQI▼356
=3112Albanylast full day 11 OctNew York, United States 21 US AQI▼336
=3112ProvidenceRhode Island, United States 21 US AQI▼324
=3112LompocCalifornia, United States 21 US AQI▼334
=3112ArvadaColorado, United States 21 US AQI▼323
=3112EnterpriseNevada, United States 21 US AQI▼332
=3112EphrataWashington, United States 21 US AQI▼353
=3112Mount VernonWashington, United States 21 US AQI▼352
=3112AllistonOntario, Canada 21 US AQI▼302
=3112CrestonBritish Columbia, Canada 21 US AQI▼349
=3112DrummondvilleQuebec, Canada 21 US AQI▼348
=3112Miltonlast full day 9 OctOntario, Canada 21 US AQI▼364
=3112High PeakEngland, United Kingdom 21 US AQI
=3112KallahtiUusimaa, Finland 21 US AQI▼344
=3134Saint-PaulReunion, Reunion 20 US AQI
=3134KujiIwate, Japan 20 US AQI▼334
=3134WrexhamWales, United Kingdom 20 US AQI
=3134PickeringEngland, United Kingdom 20 US AQI
=3134OxfordEngland, United Kingdom 20 US AQI
=3134AurillacAuvergne-Rhône-Alpes, France 20 US AQI▼351
=3134FrostburgMaryland, United States 20 US AQI▼332
=3134PaulsboroNew Jersey, United States 20 US AQI▼350
=3134GreenfieldMassachusetts, United States 20 US AQI▼349
=3134UxbridgeMassachusetts, United States 20 US AQI▼330
=3134AugustaMaine, United States 20 US AQI▼380
=3134MarquetteMichigan, United States 20 US AQI▼361
=3134BlairNebraska, United States 20 US AQI▼347
=3134PortsmouthNew Hampshire, United States 20 US AQI▼359
=3134HendersonNevada, United States 20 US AQI▼343
=3134Spring ValleyNevada, United States 20 US AQI▼342
=3134Hood RiverOregon, United States 20 US AQI▼341
=3134Oregon CityOregon, United States 20 US AQI▼340
=3134VernalUtah, United States 20 US AQI▼339
=3134Hilolast full day 11 OctHawaii, United States 20 US AQI▼325
=3134AnchorageAlaska, United States 20 US AQI▼373
=3134KingstonOntario, Canada 20 US AQI▼338
=3134NepeanOntario, Canada 20 US AQI▼385
=3134WhistlerBritish Columbia, Canada 20 US AQI▼320
=3158HedemoraDalarna, Sweden 19 US AQI▼357
=3158KillarneyMunster, Ireland 19 US AQI▼388
=3158CorteCorsica, France 19 US AQI
=3158New LondonConnecticut, United States 19 US AQI▼339
=3158PittsfieldMassachusetts, United States 19 US AQI▼355
=3158WorcesterMassachusetts, United States 19 US AQI▼337
=3158ManisteeMichigan, United States 19 US AQI▼336
=3158Uticalast full day 11 OctNew York, United States 19 US AQI▼352
=3158VermillionSouth Dakota, United States 19 US AQI▼335
=3158BrookfieldWisconsin, United States 19 US AQI▼273
=3158DeltaColorado, United States 19 US AQI▼368
=3158LittletonColorado, United States 19 US AQI▼319
=3158McMinnvilleOregon, United States 19 US AQI▼350
=3158OttawaOntario, Canada 19 US AQI▼361
=3158Sept-ÎlesQuebec, Canada 19 US AQI▼359
=3173OuluNorth Ostrobothnia, Finland 19 US AQI▼358
=3173FraminghamMassachusetts, United States 19 US AQI▼337
=3173LondonderryNew Hampshire, United States 19 US AQI▼368
=3173BurlingtonVermont, United States 19 US AQI▼349
=3173MaranaArizona, United States 19 US AQI▼348
=3173PriceUtah, United States 19 US AQI▼366
=3173MissoulaMontana, United States 19 US AQI▼344
=3173PierreSouth Dakota, United States 19 US AQI▼343
=3173North BayOntario, Canada 19 US AQI▼362
=3173SaguenayQuebec, Canada 19 US AQI▼361
=3173Saint John EastNew Brunswick, Canada 19 US AQI▼375
=3173SherbrookeQuebec, Canada 19 US AQI▼360
=3173Summerlin SouthNevada, United States 19 US AQI▼341
=3186LahtiPaijat-Hame, Finland 18 US AQI▼353
=3186HämeenkyläUusimaa, Finland 18 US AQI▼370
=3186AdelaideSouth Australia, Australia 18 US AQI▼339
=3186ChepstowWales, United Kingdom 18 US AQI
=3186Vila RealVila Real, Portugal 18 US AQI▼338
=3186OlpeNorth Rhine-Westphalia, Germany 18 US AQI
=3186GersfeldHesse, Germany 18 US AQI▼368
=3186Haverhilllast full day 9 OctMassachusetts, United States 18 US AQI▼366
=3186WareMassachusetts, United States 18 US AQI▼336
=3186HartfordVermont, United States 18 US AQI▼349
=3186Ken CarylColorado, United States 18 US AQI▼348
=3186South ValleyNew Mexico, United States 18 US AQI▼358
=3186BoulderColorado, United States 18 US AQI▼346
=3186CasperWyoming, United States 18 US AQI▼345
=3186GilletteWyoming, United States 18 US AQI▼344

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).