All 3,198 cities by PM2.5, this year

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.

=2786AlpineCalifornia, United States 34 US AQI1.2 times the WHO guideline▼356
=2786Redwood CityCalifornia, United States 34 US AQI1.2 times the WHO guideline▼335
=2786AlbuquerqueNew Mexico, United States 34 US AQI1.2 times the WHO guideline▼333
=2786Las VegasNevada, United States 34 US AQI1.2 times the WHO guideline▼332
=2786Pocatellolast full day 8 OctIdaho, United States 34 US AQI1.2 times the WHO guideline▼331
=2786TigardOregon, United States 34 US AQI1.2 times the WHO guideline▼330
=2786RooseveltUtah, United States 34 US AQI1.2 times the WHO guideline▼352
=2786SeattleWashington, United States 34 US AQI1.2 times the WHO guideline▼328
=2786BécancourQuebec, Canada 34 US AQI1.2 times the WHO guideline▼327
=2810GeroGifu, Japan 34 US AQI1.2 times the WHO guideline▼349
=2810KatsuuraChiba, Japan 34 US AQI1.2 times the WHO guideline▼348
=2810TomakomaiHokkaido, Japan 34 US AQI1.2 times the WHO guideline▼347
=2810TownsvilleQueensland, Australia 34 US AQI1.2 times the WHO guideline▼328
=2810SeafordEngland, United Kingdom 34 US AQI1.2 times the WHO guideline
=2810CarlisleEngland, United Kingdom 34 US AQI1.2 times the WHO guideline
=2810BarnstapleEngland, United Kingdom 34 US AQI1.2 times the WHO guideline
=2810Waldfischbach-Burgalbenlast full day 10 OctRheinland-Pfalz, Germany 34 US AQI1.2 times the WHO guideline▼366
=2810MallowMunster, Ireland 34 US AQI1.2 times the WHO guideline
=2810Mo i Ranalast full day 7 OctNordland, Norway 34 US AQI1.2 times the WHO guideline
=2810São SebastiãoSão Paulo, Brazil 34 US AQI1.2 times the WHO guideline
=2810Belle GladeFlorida, United States 34 US AQI1.2 times the WHO guideline▼343
=2810Sarasota SpringsFlorida, United States 34 US AQI1.2 times the WHO guideline▼342
=2810LafayetteLouisiana, United States 34 US AQI1.2 times the WHO guideline▼341
=2810KeeneNew Hampshire, United States 34 US AQI1.2 times the WHO guideline▼340
=2810Syracuselast full day 11 OctNew York, United States 34 US AQI1.2 times the WHO guideline▼339
=2810El RioCalifornia, United States 34 US AQI1.2 times the WHO guideline▼338
=2810Palo AltoCalifornia, United States 34 US AQI1.2 times the WHO guideline▼116
=2810Rancho MurietaCalifornia, United States 34 US AQI1.2 times the WHO guideline▼337
=2810UkiahCalifornia, United States 34 US AQI1.2 times the WHO guideline▼358
=2810Fort CollinsColorado, United States 34 US AQI1.2 times the WHO guideline▼336
=2810MissoulaMontana, United States 34 US AQI1.2 times the WHO guideline▼335
=2810EugeneOregon, United States 34 US AQI1.2 times the WHO guideline▼334
=2810StaytonOregon, United States 34 US AQI1.2 times the WHO guideline▼333
=2810Brigham CityUtah, United States 34 US AQI1.2 times the WHO guideline▼353
=2810MagnaUtah, United States 34 US AQI1.2 times the WHO guideline▼332
=2810Stansbury parkUtah, United States 34 US AQI1.2 times the WHO guideline▼331
=2810KostelMunicipality of Kostel, Slovenia 34 US AQI1.2 times the WHO guideline▼274
=2838PoriSatakunta, Finland 33 US AQI1.2 times the WHO guideline▼378
=2838KamaishiIwate, Japan 33 US AQI1.2 times the WHO guideline▼357
=2838RockhamptonQueensland, Australia 33 US AQI1.2 times the WHO guideline▼355
=2838DunedinOtago, New Zealand 33 US AQI1.2 times the WHO guideline▼374
=2838SwindonEngland, United Kingdom 33 US AQI1.2 times the WHO guideline
=2838ShrewsburyEngland, United Kingdom 33 US AQI1.2 times the WHO guideline
=2838IrlamEngland, United Kingdom 33 US AQI1.2 times the WHO guideline
=2838AndoverEngland, United Kingdom 33 US AQI1.2 times the WHO guideline
=2838RixensartWallonia, Belgium 33 US AQI1.2 times the WHO guideline▼338
=2838Flémalle-HauteWallonia, Belgium 33 US AQI1.2 times the WHO guideline▼373
=2838LimerickMunster, Ireland 33 US AQI1.2 times the WHO guideline
=2838Cluain MealaMunster, Ireland 33 US AQI1.2 times the WHO guideline▼352
=2838BloisCentre-Val de Loire, France 33 US AQI1.2 times the WHO guideline▼556
=2838Villarejo de SalvanésMadrid, Spain 33 US AQI1.2 times the WHO guideline
=2838Lake MaryFlorida, United States 33 US AQI1.2 times the WHO guideline▼351
=2838WellingtonFlorida, United States 33 US AQI1.2 times the WHO guideline▼350
=2838FrostburgMaryland, United States 33 US AQI1.2 times the WHO guideline▼349
=2838RockvilleMaryland, United States 33 US AQI1.2 times the WHO guideline▼348
=2838Fall RiverMassachusetts, United States 33 US AQI1.2 times the WHO guideline▼347
=2838LynnMassachusetts, United States 33 US AQI1.2 times the WHO guideline▼346
=2838MesaArizona, United States 33 US AQI1.2 times the WHO guideline▼345
=2838YrekaCalifornia, United States 33 US AQI1.2 times the WHO guideline▼344
=2838PullmanWashington, United States 33 US AQI1.2 times the WHO guideline▼342
=2838FairbanksAlaska, United States 33 US AQI1.2 times the WHO guideline▼341
=2838OttawaOntario, Canada 33 US AQI1.2 times the WHO guideline▼340
=2863BathurstNew South Wales, Australia 33 US AQI1.2 times the WHO guideline▼364
=2863AlmeríaAndalusia, Spain 33 US AQI1.2 times the WHO guideline
=2863OxfordEngland, United Kingdom 33 US AQI1.2 times the WHO guideline
=2863NaasLeinster, Ireland 33 US AQI1.2 times the WHO guideline▼379
=2863GreystonesLeinster, Ireland 33 US AQI1.2 times the WHO guideline▼397
=2863FraminghamMassachusetts, United States 33 US AQI1.2 times the WHO guideline▼361
=2863Haverhilllast full day 9 OctMassachusetts, United States 33 US AQI1.2 times the WHO guideline▼360
=2863LowellMassachusetts, United States 33 US AQI1.2 times the WHO guideline▼359
=2863North AdamsMassachusetts, United States 33 US AQI1.2 times the WHO guideline▼358
=2863MarshallMinnesota, United States 33 US AQI1.2 times the WHO guideline▼357
=2863AtascaderoCalifornia, United States 33 US AQI1.2 times the WHO guideline▼356
=2863GilroyCalifornia, United States 33 US AQI1.2 times the WHO guideline▼354
=2863North AuburnCalifornia, United States 33 US AQI1.2 times the WHO guideline▼353
=2863GlendiveMontana, United States 33 US AQI1.2 times the WHO guideline▼351
=2863Grants PassOregon, United States 33 US AQI1.2 times the WHO guideline▼368
=2863HerrimanUtah, United States 33 US AQI1.2 times the WHO guideline▼350
=2863PeterboroughOntario, Canada 33 US AQI1.2 times the WHO guideline▼349
=2863Albion Park RailNew South Wales, Australia 33 US AQI1.2 times the WHO guideline▼348
=2863Grand CentreAlberta, Canada 33 US AQI1.2 times the WHO guideline▼347
=2882LohjaUusimaa, Finland 32 US AQI1.2 times the WHO guideline▼365
=2882Port MacquarieNew South Wales, Australia 32 US AQI1.2 times the WHO guideline▼364
=2882BrisbaneQueensland, Australia 32 US AQI1.2 times the WHO guideline▼310
=2882LavertonVictoria, Australia 32 US AQI1.2 times the WHO guideline▼362
=2882WrexhamWales, United Kingdom 32 US AQI1.2 times the WHO guideline
=2882StreetEngland, United Kingdom 32 US AQI1.2 times the WHO guideline
=2882RoscommonConnacht, Ireland 32 US AQI1.2 times the WHO guideline
=2882KillarneyMunster, Ireland 32 US AQI1.2 times the WHO guideline▼397
=2882BermeoBasque Country, Spain 32 US AQI1.2 times the WHO guideline
=2882OsloOslo, Norway 32 US AQI1.2 times the WHO guideline
=2882CambridgeMaryland, United States 32 US AQI1.2 times the WHO guideline▼358
=2882WorcesterMassachusetts, United States 32 US AQI1.2 times the WHO guideline▼357
=2882AugustaMaine, United States 32 US AQI1.2 times the WHO guideline▼356
=2882ArvadaColorado, United States 32 US AQI1.2 times the WHO guideline▼353
=2882ReddingCalifornia, United States 32 US AQI1.2 times the WHO guideline▼352
=2882HillsboroOregon, United States 32 US AQI1.2 times the WHO guideline▼351
=2882North OgdenUtah, United States 32 US AQI1.2 times the WHO guideline▼350
=2882Parry SoundOntario, Canada 32 US AQI1.2 times the WHO guideline▼348
=2882Münstertal/SchwarzwaldBaden-Wurttemberg, Germany 32 US AQI1.2 times the WHO guideline▼402

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), this year to 14 Oct 2026, 06:00 UTC: each city's mean of its daily means, cities measured on 70% or more of the days since 1 January (at least 14). Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=year. Ranked on low-cost sensors, with no reference monitor in the city: #2 Faisalabad, #3 Gujranwala and #6 Lahore. Some values from Sensor.Community, ODbL. Some readings from Department of Environment, Nepal; Vietnam's government monitors; 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 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: Department of Environment, Nepal; Vietnam's government monitors; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).