All 2,645 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). EEA and Catalonia Medi Ambient I Sostenibilitat in Spain: no readings since 13 Oct (336 monitors). Their cities are missing from this board, not clean.

Hide the 1,153 cities with only 1–2 sensors

These cities have only one or two low-cost sensors, and one cheap unit can read well off, so they take no rank. They sit at their place by value, marked –, and every ranked city keeps its number.

not rankedRickmansworthEngland, United Kingdom 8 US AQI0.1 times the WHO guideline
not rankedDidcotEngland, United Kingdom 8 US AQI0.1 times the WHO guideline
not rankedSierreValais, Switzerland 8 US AQI0.1 times the WHO guideline
not rankedWittenheimGrand Est, France 8 US AQI0.1 times the WHO guideline
not rankedEastonMassachusetts, United States 8 US AQI0.1 times the WHO guideline
not rankedGilbertArizona, United States no daily values yet8 US AQI0.1 times the WHO guideline
=2619Stara ZagoraStara Zagora, Bulgaria 7 US AQI0.1 times the WHO guideline▼88
=2619KazanlakStara Zagora, Bulgaria 7 US AQI0.1 times the WHO guideline▼553
=2619DuluthMinnesota, United States 7 US AQI0.1 times the WHO guideline▼74
=2619AberdeenSouth Dakota, United States 7 US AQI0.1 times the WHO guideline
=2619DeltaColorado, United States 7 US AQI0.1 times the WHO guideline▼178
=2619Rouyn-NorandaQuebec, Canada 7 US AQI0.1 times the WHO guideline▲37
not rankedPeterleeEngland, United Kingdom 7 US AQI0.1 times the WHO guideline
not rankedEmmendingenBaden-Wurttemberg, Germany 7 US AQI0.1 times the WHO guideline
not rankedOakvilleMissouri, United States 7 US AQI0.1 times the WHO guideline
2625RooseveltUtah, United States 7 US AQI0.1 times the WHO guideline▲34
not rankedNéa ErythraíaAttica, Greece 7 US AQI0.1 times the WHO guideline
not rankedNoginskMoscow Oblast, Russia 7 US AQI0.1 times the WHO guideline
not rankedGioia TauroCalabria, Italy 7 US AQI0.1 times the WHO guideline
not rankedSaleEngland, United Kingdom 7 US AQI0.1 times the WHO guideline
not rankedMarket HarboroughEngland, United Kingdom 7 US AQI0.1 times the WHO guideline
not rankedAshfordEngland, United Kingdom 7 US AQI0.1 times the WHO guideline
not rankedSavigny-sur-OrgeÎle-de-France, France 7 US AQI0.1 times the WHO guideline
not rankedLillestrømAkershus, Norway 7 US AQI0.1 times the WHO guideline
not rankedCesenaEmilia-Romagna, Italy 7 US AQI0.1 times the WHO guideline
not rankedMarlboroughMassachusetts, United States 7 US AQI0.1 times the WHO guideline
not rankedWest AlbanyNew York, United States 7 US AQI0.1 times the WHO guideline
not rankedValenciaCalifornia, United States 7 US AQI0.1 times the WHO guideline
=2626Casas AdobesArizona, United States 6 US AQI0.1 times the WHO guideline▼248
=2626EnochUtah, United States 6 US AQI0.1 times the WHO guideline▲26
=2626OremUtah, United States 6 US AQI0.1 times the WHO guideline▲1
=2626Spanish ForkUtah, United States 6 US AQI0.1 times the WHO guideline▼135
=2626DrummondvilleQuebec, Canada 6 US AQI0.1 times the WHO guideline▼421
not rankedTomskTomsk Oblast, Russia 6 US AQI0.1 times the WHO guideline
not rankedRoystonEngland, United Kingdom 6 US AQI0.1 times the WHO guideline
not rankedOswestryEngland, United Kingdom 6 US AQI0.1 times the WHO guideline
not rankedPesaroThe Marches, Italy 6 US AQI0.1 times the WHO guideline
not rankedMerrimackNew Hampshire, United States 6 US AQI0.1 times the WHO guideline
not rankedGatineauQuebec, Canada 6 US AQI0.1 times the WHO guideline
=2631DronfieldEngland, United Kingdom 6 US AQI0.1 times the WHO guideline▼504
=2631GersfeldHesse, Germany 6 US AQI0.1 times the WHO guideline▼317
=2631PriceUtah, United States 6 US AQI0.1 times the WHO guideline▲40
=2631CheneyWashington, United States 6 US AQI0.1 times the WHO guideline▲53
=2631SherbrookeQuebec, Canada 6 US AQI0.1 times the WHO guideline▼509
not rankedJakobsbergStockholm, Sweden 6 US AQI0.1 times the WHO guideline
not rankedStarnbergBavaria, Germany 6 US AQI0.1 times the WHO guideline
not rankedMontreuilÎle-de-France, France 6 US AQI0.1 times the WHO guideline
not rankedBeloeilQuebec, Canada 6 US AQI0.1 times the WHO guideline
=2636CloquetMinnesota, United States 5 US AQI0.1 times the WHO guideline▼149
=2636AspenColorado, United States 5 US AQI0.1 times the WHO guideline▼61
=2636North BayOntario, Canada 5 US AQI0.1 times the WHO guideline▼252
not rankedAbakanKhakasiya Republic, Russia 5 US AQI0.1 times the WHO guideline
not rankedAvonÎle-de-France, France 5 US AQI0.1 times the WHO guideline
not rankedCatacamasOlancho Department, Honduras no daily values yet5 US AQI0.1 times the WHO guideline
not rankedLa PazLa Paz Department, Bolivia 5 US AQI0.1 times the WHO guideline
not rankedSudburyMassachusetts, United States 5 US AQI0.1 times the WHO guideline
2639Heber CityUtah, United States 4 US AQI0.1 times the WHO guideline▲38
not rankedFalconara MarittimaThe Marches, Italy 4 US AQI0.1 times the WHO guideline
not rankedEaganMinnesota, United States 4 US AQI0.1 times the WHO guideline
not rankedPomonaCalifornia, United States 4 US AQI0.1 times the WHO guideline
=2640LaconiaNew Hampshire, United States 4 US AQI0.0 times the WHO guideline▼68
=2640YellowknifeNorthwest Territories, Canada 4 US AQI0.0 times the WHO guideline▼3
not rankedNorthallertonEngland, United Kingdom 4 US AQI0.0 times the WHO guideline
not rankedMontereau-Fault-YonneÎle-de-France, France 4 US AQI0.0 times the WHO guideline
not rankedSpringTexas, United States 4 US AQI0.0 times the WHO guideline
not rankedRosemountMinnesota, United States 4 US AQI0.0 times the WHO guideline
not rankedSanta FeNew Mexico, United States 4 US AQI0.0 times the WHO guideline
not rankedJuneauAlaska, United States 4 US AQI0.0 times the WHO guideline
=2642West FargoNorth Dakota, United States 3 US AQI0.0 times the WHO guideline▼33
=2642Sweet HomeOregon, United States 3 US AQI0.0 times the WHO guideline▲30
not rankedLanakenFlanders, Belgium 3 US AQI0.0 times the WHO guideline
not rankedNorth StamfordConnecticut, United States 3 US AQI0.0 times the WHO guideline
not rankedRed WingMinnesota, United States 3 US AQI0.0 times the WHO guideline
not rankedWinnipegManitoba, Canada 3 US AQI0.0 times the WHO guideline
not rankedLos Llanos de AridaneCanary Islands, Spain 3 US AQI0.0 times the WHO guideline
not rankedWoodburyMinnesota, United States 3 US AQI0.0 times the WHO guideline
not rankedEau ClaireWisconsin, United States 3 US AQI0.0 times the WHO guideline
not rankedFlorenceArizona, United States 3 US AQI0.0 times the WHO guideline
not rankedMontclairCalifornia, United States 3 US AQI0.0 times the WHO guideline
not rankedConcordNew Hampshire, United States 2 US AQI0.0 times the WHO guideline
not rankedDoverNew Hampshire, United States 2 US AQI0.0 times the WHO guideline
not rankedKanataOntario, Canada 2 US AQI0.0 times the WHO guideline
not rankedWest KelownaBritish Columbia, Canada 2 US AQI0.0 times the WHO guideline
not rankedSuttonEngland, United Kingdom 1 US AQI0.0 times the WHO guideline
not rankedBrushy CreekTexas, United States 1 US AQI0.0 times the WHO guideline
not rankedSun ValleyNevada, United States 1 US AQI0.0 times the WHO guideline
not rankedSaint-EustacheQuebec, Canada 1 US AQI0.0 times the WHO guideline
not rankedLes UlisÎle-de-France, France 1 US AQI0.0 times the WHO guideline
2644Swan HillVictoria, Australia 1 US AQI0.0 times the WHO guideline▲41
not rankedStowmarketEngland, United Kingdom 1 US AQI0.0 times the WHO guideline
not rankedRipleyEngland, United Kingdom 1 US AQI0.0 times the WHO guideline
not rankedConcepciónConcepción, Paraguay 1 US AQI0.0 times the WHO guideline
not rankedSaint-LazareQuebec, Canada 1 US AQI0.0 times the WHO guideline
2645LongyearbyenSvalbard, Svalbard and Jan Mayen 0 US AQI0.0 times the WHO guideline
not rankedKarlskogaÖrebro, Sweden 0 US AQI0.0 times the WHO guideline
not rankedBrooklyn CenterMinnesota, United States 0 US AQI0.0 times the WHO guideline
not rankedRosevilleMinnesota, United States 0 US AQI0.0 times the WHO guideline
not rankedVenturaCalifornia, United States 0 US AQI0.0 times the WHO guideline

What stands behind each figure: Checked at 2+ sites One reference monitor Low-cost sensors 1–2 sensors, not ranked 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, 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 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 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: 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).