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.

=2457TruckeeCalifornia, United States 30 US AQI▼173
=2457Sunland ParkNew Mexico, United States 30 US AQI▼171
=2457AmarilloTexas, United States 30 US AQI▼257
=2457GreeleyColorado, United States 30 US AQI▼256
=2457LewistownMontana, United States 30 US AQI▼169
=2457LockwoodMontana, United States 30 US AQI▼255
=2457MagnaUtah, United States 30 US AQI▼309
=2457Columbia CityWashington, United States 30 US AQI
=2457Aizu-WakamatsuFukushima, Japan 30 US AQI▼162
=2457KisoNagano, Japan 30 US AQI▼89
=2457SodegauraChiba, Japan 30 US AQI▼214
=2512Naujoji AkmeneSiauliai, Lithuania 29 US AQI
=2512Veliko TŭrnovoVeliko Tarnovo, Bulgaria 29 US AQI▼268
=2512ŌmeTokyo, Japan 29 US AQI▼266
=2512NiigataNiigata, Japan 29 US AQI▼265
=2512SendaiMiyagi, Japan 29 US AQI▼263
=2512Ōuchilast full day 8 OctMiyagi, Japan 29 US AQI▼262
=2512HokotaIbaraki, Japan 29 US AQI▼211
=2512SouthamptonEngland, United Kingdom 29 US AQI
=2512PortsmouthEngland, United Kingdom 29 US AQI
=2512EastbourneEngland, United Kingdom 29 US AQI
=2512BelfastNorthern Ireland, United Kingdom 29 US AQI
=2512Malmölast full day 11 OctSkåne, Sweden 29 US AQI
=2512VielsalmWallonia, Belgium 29 US AQI▼257
=2512Rüsselsheim am MainHesse, Germany 29 US AQI▼209
=2512Meiningenlast full day 10 OctThuringia, Germany 29 US AQI▼340
=2512BensheimHesse, Germany 29 US AQI▼252
=2512BebraHesse, Germany 29 US AQI▼251
=2512GrevenmacherGrevenmacher, Luxembourg 29 US AQI▼173
=2512BirrLeinster, Ireland 29 US AQI▼296
=2512VillefontaineAuvergne-Rhône-Alpes, France 29 US AQI
=2512LorientBrittany, France 29 US AQI▼203
=2512GapProvence-Alpes-Côte d'Azur, France 29 US AQI
=2512ÉpernayGrand Est, France 29 US AQI
=2512DongesPays de la Loire, France 29 US AQI
=2512Chalon-sur-SaôneBourgogne-Franche-Comté, France 29 US AQI
=2512AuriolProvence-Alpes-Côte d'Azur, France 29 US AQI▼201
=2512AlençonNormandy, France 29 US AQI▼167
=2512BermeoBasque Country, Spain 29 US AQI▼248
=2512AthloneLeinster, Ireland 29 US AQI▼247
=2512PikevilleKentucky, United States 29 US AQI▼198
=2512Hunt ValleyMaryland, United States 29 US AQI▼124
=2512Toms RiverNew Jersey, United States 29 US AQI▼244
=2512PhiladelphiaPennsylvania, United States 29 US AQI▼197
=2512MolineIllinois, United States 29 US AQI▼162
=2512Bay CityMichigan, United States 29 US AQI▼196
=2512TecumsehMichigan, United States 29 US AQI▼195
=2512AkronOhio, United States 29 US AQI▼237
=2512AbingtonPennsylvania, United States 29 US AQI▼235
=2512HarrisburgPennsylvania, United States 29 US AQI▼234
=2512New BrightonPennsylvania, United States 29 US AQI▼191
=2512GreendaleWisconsin, United States 29 US AQI▼190
=2512CrestlineCalifornia, United States 29 US AQI▼314
=2512El CentroCalifornia, United States 29 US AQI▼276
=2512FolsomCalifornia, United States 29 US AQI▼229
=2512Spanish SpringsNevada, United States 29 US AQI▼225
=2512Pocatellolast full day 8 OctIdaho, United States 29 US AQI▼273
=2512Spanish ForkUtah, United States 29 US AQI▼308
=2512GrandviewWashington, United States 29 US AQI▼362
=2512ProsserWashington, United States 29 US AQI▼307
=2512SheridanWyoming, United States 29 US AQI▼220
=2512DeltaBritish Columbia, Canada 29 US AQI▼272
=2512ReginaSaskatchewan, Canada 29 US AQI▼219
=2512SaskatoonSaskatchewan, Canada 29 US AQI▼218
=2512ChikumaNagano, Japan 29 US AQI▼95
=2512NasukarasuyamaTochigi, Japan 29 US AQI▼180
=2512IkiNagasaki, Japan 29 US AQI▼179
=2568KastoriaWest Macedonia, Greece 29 US AQI▼323
=2568KitaibarakiIbaraki, Japan 29 US AQI▼195
=2568KatsuuraChiba, Japan 29 US AQI▼316
=2568Tōmalast full day 4 OctHokkaido, Japan 29 US AQI▼315
=2568ObihiroHokkaido, Japan 29 US AQI▼232
=2568MelbourneVictoria, Australia 29 US AQI▼266
=2568AlburyNew South Wales, Australia 29 US AQI▼314
=2568SheffieldEngland, United Kingdom 29 US AQI
=2568MiddlewichEngland, United Kingdom 29 US AQI
=2568LeicesterEngland, United Kingdom 29 US AQI
=2568GloucesterEngland, United Kingdom 29 US AQI
=2568CwmafanWales, United Kingdom 29 US AQI
=2568BristolEngland, United Kingdom 29 US AQI
=2568BorehamwoodEngland, United Kingdom 29 US AQI
=2568Sondershausenlast full day 10 OctThuringia, Germany 29 US AQI▼310
=2568Rintelnlast full day 10 OctLower Saxony, Germany 29 US AQI▼264
=2568Baden-BadenBaden-Wurttemberg, Germany 29 US AQI▼353
=2568TraleeMunster, Ireland 29 US AQI▼394
=2568SligoConnacht, Ireland 29 US AQI▼306
=2568SorbiersAuvergne-Rhône-Alpes, France 29 US AQI▼261
=2568Saint-ChamondAuvergne-Rhône-Alpes, France 29 US AQI
=2568RambouilletÎle-de-France, France 29 US AQI▼392
=2568PérigueuxNew Aquitaine, France 29 US AQI▼227
=2568PauNew Aquitaine, France 29 US AQI▼260
=2568ÉtampesÎle-de-France, France 29 US AQI▼258
=2568ChambéryAuvergne-Rhône-Alpes, France 29 US AQI▼226
=2568Villarejo de SalvanésMadrid, Spain 29 US AQI▼526
=2568KoperUrban Municipality of Koper, Slovenia 29 US AQI▼256
=2568São SebastiãoSão Paulo, Brazil 29 US AQI
=2568Doverlast full day 4 OctDelaware, United States 29 US AQI▼255
=2568BaltimoreMaryland, United States 29 US AQI▼181
=2568ChambersburgPennsylvania, United States 29 US AQI▼178
=2568HudsonvilleMichigan, United States 29 US AQI▼217

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).