All 2,653 cities by PM2.5, last 24 hours

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

CPCB in India: no readings since 12 Oct (488 monitors). Their cities are missing from this board, not clean.

=2599HartfordVermont, United States 9 US AQI0.1 times the WHO guideline▼531
=2599AlamosaColorado, United States 9 US AQI0.1 times the WHO guideline▼238
=2599South ValleyNew Mexico, United States 9 US AQI0.1 times the WHO guideline▼424
=2599North OgdenUtah, United States 9 US AQI0.1 times the WHO guideline▼161
=2599GranbyQuebec, Canada 9 US AQI0.1 times the WHO guideline▼870
=2599Labrador CityNewfoundland and Labrador, Canada 9 US AQI0.1 times the WHO guideline▼100
=2599NepeanOntario, Canada 9 US AQI0.1 times the WHO guideline▼1174
=2599Trois-RivièresQuebec, Canada 9 US AQI0.1 times the WHO guideline▼805
=2609BendigoVictoria, Australia 8 US AQI0.1 times the WHO guideline▼145
=2609KarlstadVärmland, Sweden 8 US AQI0.1 times the WHO guideline▼142
=2609NagoldBaden-Wurttemberg, Germany 8 US AQI0.1 times the WHO guideline
=2609GlashüttenHesse, Germany 8 US AQI0.1 times the WHO guideline▼635
=2609AugustaMaine, United States 8 US AQI0.1 times the WHO guideline▼569
=2609BrainerdMinnesota, United States 8 US AQI0.1 times the WHO guideline▼999
=2609MissoulaMontana, United States 8 US AQI0.1 times the WHO guideline
=2609Brigham CityUtah, United States 8 US AQI0.1 times the WHO guideline▼247
=2609MagnaUtah, United States 8 US AQI0.1 times the WHO guideline▼246
=2618CanberraAustralian Capital Territory, Australia 8 US AQI0.1 times the WHO guideline▼1904
=2618JumetWallonia, Belgium 8 US AQI0.1 times the WHO guideline▼250
=2618Detroit LakesMinnesota, United States 8 US AQI0.1 times the WHO guideline▼1173
=2618SuperiorWisconsin, United States 8 US AQI0.1 times the WHO guideline▼634
=2618Steamboat SpringsColorado, United States 8 US AQI0.1 times the WHO guideline▼201
=2618VernalUtah, United States 8 US AQI0.1 times the WHO guideline▼135
=2624BurgasBurgas, Bulgaria 7 US AQI0.1 times the WHO guideline▼522
=2624ChampionWallonia, Belgium 7 US AQI0.1 times the WHO guideline▼144
=2624MarquetteMichigan, United States 7 US AQI0.1 times the WHO guideline▼802
=2624DeltaColorado, United States 7 US AQI0.1 times the WHO guideline▼389
=2624Rouyn-NorandaQuebec, Canada 7 US AQI0.1 times the WHO guideline▼175
=2629DronfieldEngland, United Kingdom 7 US AQI0.1 times the WHO guideline▼662
=2629HamoisWallonia, Belgium 7 US AQI0.1 times the WHO guideline▼141
=2629DuluthMinnesota, United States 7 US AQI0.1 times the WHO guideline▼429
=2629Casas AdobesArizona, United States 7 US AQI0.1 times the WHO guideline▼456
=2629RooseveltUtah, United States 7 US AQI0.1 times the WHO guideline▼147
=2629Spanish ForkUtah, United States 7 US AQI0.1 times the WHO guideline▼321
=2629DrummondvilleQuebec, Canada 7 US AQI0.1 times the WHO guideline▼608
=2636Stara ZagoraStara Zagora, Bulgaria 6 US AQI0.1 times the WHO guideline▼304
=2636KazanlakStara Zagora, Bulgaria 6 US AQI0.1 times the WHO guideline▼1020
=2636SherbrookeQuebec, Canada 6 US AQI0.1 times the WHO guideline▼723
=2639GersfeldHesse, Germany 6 US AQI0.1 times the WHO guideline▼530
=2639EnochUtah, United States 6 US AQI0.1 times the WHO guideline▼167
=2639OremUtah, United States 6 US AQI0.1 times the WHO guideline▼200
=2642CloquetMinnesota, United States 5 US AQI0.1 times the WHO guideline▼498
=2642AspenColorado, United States 5 US AQI0.1 times the WHO guideline▼266
=2642PriceUtah, United States 5 US AQI0.1 times the WHO guideline▼150
=2642CheneyWashington, United States 5 US AQI0.1 times the WHO guideline▼140
=2642North BayOntario, Canada 5 US AQI0.1 times the WHO guideline▼486
=2642YellowknifeNorthwest Territories, Canada 5 US AQI0.1 times the WHO guideline▼191
2648LaconiaNew Hampshire, United States 4 US AQI0.1 times the WHO guideline▼274
=2649West FargoNorth Dakota, United States 3 US AQI0.0 times the WHO guideline▼276
=2649Sweet HomeOregon, United States 3 US AQI0.0 times the WHO guideline▼156
=2649Heber CityUtah, United States 3 US AQI0.0 times the WHO guideline▼160
2652Swan HillVictoria, Australia 1 US AQI0.0 times the WHO guideline▼149
2653LongyearbyenSvalbard, Svalbard and Jan Mayen 0 US AQI0.0 times the WHO guideline

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 24 hours to 14 Oct 2026, 03:00 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 Gaur, Madhesh, #2 Kuala Lumpur, #4 Multan, #5 Faisalabad, #6 Gujranwala, #7 Lilongwe, #8 Lahore, #9 Dhaka and #10 Bahawalpur. Some values from Sensor.Community, ODbL. Some readings from Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published.

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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 03:07 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; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).