All 2,686 cities by PM2.5, last 24 hours

Every city with enough measurements in this window, worst first.

CPCB in India: no readings since 7 Oct (488 monitors). EEA in Spain: no readings since 10 Oct (310 monitors). Catalonia Medi Ambient I Sostenibilitat in Spain: no readings since 9 Oct (26 monitors). Their cities are missing from this board, not clean.

=2387CharlotteNorth Carolina, United States 14 US AQI0.2 times the WHO guideline▼159
=2387BrocktonMassachusetts, United States 14 US AQI0.2 times the WHO guideline▼1249
=2387North AdamsMassachusetts, United States 14 US AQI0.2 times the WHO guideline▼528
=2387SpringfieldMassachusetts, United States 14 US AQI0.2 times the WHO guideline▼1005
=2387MendhamNew Jersey, United States 14 US AQI0.2 times the WHO guideline▼790
=2387Cereslow-cost sensorsCalifornia, United States 14 US AQI0.2 times the WHO guideline▲110
=2387Goletalow-cost sensorsCalifornia, United States 14 US AQI0.2 times the WHO guideline▲45
=2387Torrancelow-cost sensorsCalifornia, United States 14 US AQI0.2 times the WHO guideline▼839
=2387DenverColorado, United States 14 US AQI0.2 times the WHO guideline▼479
=2387PuebloColorado, United States 14 US AQI0.2 times the WHO guideline▼521
=2387HurricaneUtah, United States 14 US AQI0.2 times the WHO guideline▲88
=2387BoiseIdaho, United States 14 US AQI0.2 times the WHO guideline▼272
=2387Coeur d'AleneIdaho, United States 14 US AQI0.2 times the WHO guideline▼179
=2387ButteMontana, United States 14 US AQI0.2 times the WHO guideline▼14
=2387DallasOregon, United States 14 US AQI0.2 times the WHO guideline▼66
=2387TalentOregon, United States 14 US AQI0.2 times the WHO guideline▼85
=2387BellevueWashington, United States 14 US AQI0.2 times the WHO guideline▲2
=2387EllensburgWashington, United States 14 US AQI0.2 times the WHO guideline▼11
=2387Fort McMurrayAlberta, Canada 14 US AQI0.2 times the WHO guideline▼127
=2387MonctonNew Brunswick, Canada 14 US AQI0.2 times the WHO guideline▼99
=2421NewportWales, United Kingdom 13 US AQI0.2 times the WHO guideline▼361
=2421Milton KeynesEngland, United Kingdom 13 US AQI0.2 times the WHO guideline▼504
=2421HooEngland, United Kingdom 13 US AQI0.2 times the WHO guideline▼962
=2421GraysEngland, United Kingdom 13 US AQI0.2 times the WHO guideline▼584
=2421LubnjowBrandenburg, Germany 13 US AQI0.2 times the WHO guideline▼263
=2421Landau in der Pfalzlow-cost sensorsRheinland-Pfalz, Germany 13 US AQI0.2 times the WHO guideline
=2421LimerickMunster, Ireland 13 US AQI0.2 times the WHO guideline▼129
=2421KillarneyMunster, Ireland 13 US AQI0.2 times the WHO guideline▲81
=2421LourdesOccitanie, France 13 US AQI0.2 times the WHO guideline▼21
=2421LorientBrittany, France 13 US AQI0.2 times the WHO guideline▼153
=2421La Ferté-MacéNormandy, France 13 US AQI0.2 times the WHO guideline▼177
=2421EdgewoodMaryland, United States 13 US AQI0.2 times the WHO guideline
=2421Kennett SquarePennsylvania, United States 13 US AQI0.2 times the WHO guideline▼38
=2421BrandermillVirginia, United States 13 US AQI0.2 times the WHO guideline▼279
=2421BostonMassachusetts, United States 13 US AQI0.2 times the WHO guideline▼602
=2421BangorMaine, United States 13 US AQI0.2 times the WHO guideline▼453
=2421PalmyraNew Jersey, United States 13 US AQI0.2 times the WHO guideline▼145
=2421AllentownPennsylvania, United States 13 US AQI0.2 times the WHO guideline▼334
=2421BensalemPennsylvania, United States 13 US AQI0.2 times the WHO guideline▼216
=2421SuperiorWisconsin, United States 13 US AQI0.2 times the WHO guideline▼2160
=2421DeltaColorado, United States 13 US AQI0.2 times the WHO guideline▼167
=2421BoulderColorado, United States 13 US AQI0.2 times the WHO guideline▼86
=2421Salt Lake CityUtah, United States 13 US AQI0.2 times the WHO guideline▼33
=2421WenatcheeWashington, United States 13 US AQI0.2 times the WHO guideline▼99
=2421SaguenayQuebec, Canada 13 US AQI0.2 times the WHO guideline▼443
=2421Helena Valley West CentralMontana, United States 13 US AQI0.2 times the WHO guideline▼207
=2447Kyustendillow-cost sensorsKyustendil, Bulgaria 13 US AQI0.2 times the WHO guideline
=2447FunchalMadeira, Portugal 13 US AQI0.2 times the WHO guideline▼532
=2447IrlamEngland, United Kingdom 13 US AQI0.2 times the WHO guideline▼657
=2447BurwellEngland, United Kingdom 13 US AQI0.2 times the WHO guideline▼464
=2447FürthHesse, Germany 13 US AQI0.2 times the WHO guideline▼259
=2447SwordsLeinster, Ireland 13 US AQI0.2 times the WHO guideline▼317
=2447RennesBrittany, France 13 US AQI0.2 times the WHO guideline▼410
=2447DongesPays de la Loire, France 13 US AQI0.2 times the WHO guideline▼312
=2447GlasgowDelaware, United States 13 US AQI0.2 times the WHO guideline▼134
=2447SeafordDelaware, United States 13 US AQI0.2 times the WHO guideline▼550
=2447LexingtonNorth Carolina, United States 13 US AQI0.2 times the WHO guideline▼440
=2447PhiladelphiaPennsylvania, United States 13 US AQI0.2 times the WHO guideline▼338
=2447DanburyConnecticut, United States 13 US AQI0.2 times the WHO guideline▼703
=2447WaterburyConnecticut, United States 13 US AQI0.2 times the WHO guideline▼702
=2447LowellMassachusetts, United States 13 US AQI0.2 times the WHO guideline▼1132
=2447LondonderryNew Hampshire, United States 13 US AQI0.2 times the WHO guideline▼1192
=2447WatertownSouth Dakota, United States 13 US AQI0.2 times the WHO guideline▼1413
=2447MesquiteNevada, United States 13 US AQI0.2 times the WHO guideline▼39
=2447Red BluffCalifornia, United States 13 US AQI0.2 times the WHO guideline▼113
=2447ReddingCalifornia, United States 13 US AQI0.2 times the WHO guideline▼128
=2447West Valley CityUtah, United States 13 US AQI0.2 times the WHO guideline▼109
=2447Fort St. JohnBritish Columbia, Canada 13 US AQI0.2 times the WHO guideline▼161
=2469PoriSatakunta, Finland 12 US AQI0.1 times the WHO guideline▼8
=2469WorcesterEngland, United Kingdom 12 US AQI0.1 times the WHO guideline▼447
=2469PortsmouthEngland, United Kingdom 12 US AQI0.1 times the WHO guideline▼317
=2469BorehamwoodEngland, United Kingdom 12 US AQI0.1 times the WHO guideline▼549
=2469Riemstlow-cost sensorsFlanders, Belgium 12 US AQI0.1 times the WHO guideline
=2469NamurWallonia, Belgium 12 US AQI0.1 times the WHO guideline▼369
=2469Weinheimlow-cost sensorsBaden-Wurttemberg, Germany 12 US AQI0.1 times the WHO guideline
=2469Schwedt (Oder)Brandenburg, Germany 12 US AQI0.1 times the WHO guideline▼440
=2469Rottenburglow-cost sensorsBaden-Wurttemberg, Germany 12 US AQI0.1 times the WHO guideline
=2469Bendorflow-cost sensorsRheinland-Pfalz, Germany 12 US AQI0.1 times the WHO guideline
=2469VannesBrittany, France 12 US AQI0.1 times the WHO guideline▼277
=2469La Roche-sur-YonPays de la Loire, France 12 US AQI0.1 times the WHO guideline▼621
=2469Nakło nad NoteciąKujawsko-Pomorskie, Poland 12 US AQI0.1 times the WHO guideline▼1298
=2469AthloneLeinster, Ireland 12 US AQI0.1 times the WHO guideline▼468
=2469São SebastiãoSão Paulo, Brazil 12 US AQI0.1 times the WHO guideline▼973
=2469BearDelaware, United States 12 US AQI0.1 times the WHO guideline▼197
=2469WilmingtonDelaware, United States 12 US AQI0.1 times the WHO guideline▼196
=2469QuincyMassachusetts, United States 12 US AQI0.1 times the WHO guideline▼609
=2469CloquetMinnesota, United States 12 US AQI0.1 times the WHO guideline▼1949
=2469ElizabethNew Jersey, United States 12 US AQI0.1 times the WHO guideline▼924
=2469PatersonNew Jersey, United States 12 US AQI0.1 times the WHO guideline▼895
=2469HerrimanUtah, United States 12 US AQI0.1 times the WHO guideline▼19
=2469Spanish ForkUtah, United States 12 US AQI0.1 times the WHO guideline▼28
=2469CasperWyoming, United States 12 US AQI0.1 times the WHO guideline▼376
=2469RanchettesWyoming, United States 12 US AQI0.1 times the WHO guideline▼91
=2494KuopioNorth Savo, Finland 12 US AQI0.1 times the WHO guideline▼41
=2494BallaratVictoria, Australia 12 US AQI0.1 times the WHO guideline▼100
=2494CorroiosSetúbal, Portugal 12 US AQI0.1 times the WHO guideline
=2494Royal Leamington SpaEngland, United Kingdom 12 US AQI0.1 times the WHO guideline▼470
=2494HayesEngland, United Kingdom 12 US AQI0.1 times the WHO guideline▼512
=2494BarnstapleEngland, United Kingdom 12 US AQI0.1 times the WHO guideline▼78
=2494AylesburyEngland, United Kingdom 12 US AQI0.1 times the WHO guideline▼700

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 and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. 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 24 hours to 13 Oct 2026, 05:00 UTC: each city's mean of its hourly values, cities measured in 18 or more of the 24 hours. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings. Ranked on low-cost sensors, with no reference monitor in the city: #1 Queenstown Estate, #3 Lyubertsy, #4 Gaur, Madhesh, #5 Dubai, #7 Dhaka, #8 Multan, #9 Faisalabad and #10 Gujranwala. Some values from Sensor.Community, ODbL. Some readings from Uzhydromet (Uzbekistan's Hydrometeorological Service); Vietnam's government monitors; Department of Environment, Nepal; 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 2026-10-13 05:07 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: Uzhydromet (Uzbekistan's Hydrometeorological Service); Vietnam's government monitors; Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).