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 rankedKessel-LoFlanders, Belgium 14 US AQI0.2 times the WHO guideline
not rankedSalzkottenNorth Rhine-Westphalia, Germany 14 US AQI0.2 times the WHO guideline
not rankedRheinbachNorth Rhine-Westphalia, Germany 14 US AQI0.2 times the WHO guideline
not rankedQuedlinburgSaxony-Anhalt, Germany 14 US AQI0.2 times the WHO guideline
not rankedPlauenSaxony, Germany 14 US AQI0.2 times the WHO guideline
not rankedNeusäßBavaria, Germany 14 US AQI0.2 times the WHO guideline
not rankedMeschedeNorth Rhine-Westphalia, Germany 14 US AQI0.2 times the WHO guideline
not rankedItzehoeSchleswig-Holstein, Germany 14 US AQI0.2 times the WHO guideline
not rankedHohenstein-ErnstthalSaxony, Germany 14 US AQI0.2 times the WHO guideline
not rankedDrensteinfurtNorth Rhine-Westphalia, Germany 14 US AQI0.2 times the WHO guideline
not rankedBad MergentheimBaden-Wurttemberg, Germany 14 US AQI0.2 times the WHO guideline
not rankedBlanquefortNew Aquitaine, France 14 US AQI0.2 times the WHO guideline
not rankedSanta RosaLa Pampa, Argentina 14 US AQI0.2 times the WHO guideline
not rankedCórdobaCordoba, Argentina 14 US AQI0.2 times the WHO guideline
not rankedFriscoTexas, United States 14 US AQI0.2 times the WHO guideline
not rankedWillimanticConnecticut, United States 14 US AQI0.2 times the WHO guideline
not rankedMonroeWashington, United States 14 US AQI0.2 times the WHO guideline
=2465TolyattiSamara Oblast, Russia 14 US AQI0.2 times the WHO guideline▼437
=2465AsenovgradPlovdiv, Bulgaria 14 US AQI0.2 times the WHO guideline▼434
=2465KemerovoKuzbass, Russia 14 US AQI0.2 times the WHO guideline▼1114
=2465TuggeranongAustralian Capital Territory, Australia 14 US AQI0.2 times the WHO guideline▼1184
=2465BilzenFlanders, Belgium 14 US AQI0.2 times the WHO guideline
=2465SindelfingenBaden-Wurttemberg, Germany 14 US AQI0.2 times the WHO guideline▼1665
=2465HerrenbergBaden-Wurttemberg, Germany 14 US AQI0.2 times the WHO guideline▼195
=2465DürenNorth Rhine-Westphalia, Germany 14 US AQI0.2 times the WHO guideline
=2465ChartresCentre-Val de Loire, France 14 US AQI0.2 times the WHO guideline▼481
=2465BourgesCentre-Val de Loire, France 14 US AQI0.2 times the WHO guideline▼165
=2465PollaCampania, Italy 14 US AQI0.2 times the WHO guideline▼450
=2465KeeneNew Hampshire, United States 14 US AQI0.2 times the WHO guideline▼109
=2465TaosNew Mexico, United States 14 US AQI0.2 times the WHO guideline▼240
=2465Boulder CityNevada, United States 14 US AQI0.2 times the WHO guideline▼130
=2465Carson CityNevada, United States 14 US AQI0.2 times the WHO guideline▼660
=2465PierreSouth Dakota, United States 14 US AQI0.2 times the WHO guideline▼161
=2465Walla WallaWashington, United States 14 US AQI0.2 times the WHO guideline▼102
=2465Sorel-TracyQuebec, Canada 14 US AQI0.2 times the WHO guideline▼566
=2465Swift CurrentSaskatchewan, Canada 14 US AQI0.2 times the WHO guideline▲209
not rankedGatchinaLeningradskaya Oblast', Russia 14 US AQI0.2 times the WHO guideline
not rankedKargilLadakh, India 14 US AQI0.2 times the WHO guideline
not rankedDevizesEngland, United Kingdom 14 US AQI0.2 times the WHO guideline
not rankedChislehurstEngland, United Kingdom 14 US AQI0.2 times the WHO guideline
not rankedBedfordEngland, United Kingdom 14 US AQI0.2 times the WHO guideline
not rankedRottenburgBaden-Wurttemberg, Germany 14 US AQI0.2 times the WHO guideline
not rankedKelheimBavaria, Germany 14 US AQI0.2 times the WHO guideline
not rankedFrechenNorth Rhine-Westphalia, Germany 14 US AQI0.2 times the WHO guideline
not rankedVitréBrittany, France 14 US AQI0.2 times the WHO guideline
not rankedScandicciTuscany, Italy 14 US AQI0.2 times the WHO guideline
not rankedLos AltosCalifornia, United States 14 US AQI0.2 times the WHO guideline
=2484LahtiPaijat-Hame, Finland 13 US AQI0.2 times the WHO guideline▲109
=2484HaskovoHaskovo, Bulgaria 13 US AQI0.2 times the WHO guideline▼675
=2484GoulburnNew South Wales, Australia 13 US AQI0.2 times the WHO guideline▼337
=2484RixensartWallonia, Belgium 13 US AQI0.2 times the WHO guideline▲17
=2484TrochtelfingenBaden-Wurttemberg, Germany 13 US AQI0.2 times the WHO guideline▲54
=2484JülichNorth Rhine-Westphalia, Germany 13 US AQI0.2 times the WHO guideline▼90
=2484BöblingenBaden-Wurttemberg, Germany 13 US AQI0.2 times the WHO guideline
=2484OlivetCentre-Val de Loire, France 13 US AQI0.2 times the WHO guideline▼265
=2484MontluçonAuvergne-Rhône-Alpes, France 13 US AQI0.2 times the WHO guideline▼132
=2484ÉtampesÎle-de-France, France 13 US AQI0.2 times the WHO guideline▼295
=2484CorteCorsica, France 13 US AQI0.2 times the WHO guideline
=2484BolognaEmilia-Romagna, Italy 13 US AQI0.2 times the WHO guideline▼373
=2484ReykjavíkCapital Region, Iceland 13 US AQI0.2 times the WHO guideline▼809
=2484Saint MichaelMinnesota, United States 13 US AQI0.2 times the WHO guideline▼1707
=2484ChicoCalifornia, United States 13 US AQI0.2 times the WHO guideline▼730
=2484CorvallisOregon, United States 13 US AQI0.2 times the WHO guideline▲32
=2484HerrimanUtah, United States 13 US AQI0.2 times the WHO guideline▲6
=2484RawlinsWyoming, United States 13 US AQI0.2 times the WHO guideline▲44
=2484BécancourQuebec, Canada 13 US AQI0.2 times the WHO guideline▼366
=2484LethbridgeAlberta, Canada 13 US AQI0.2 times the WHO guideline▲170
=2484SaguenayQuebec, Canada 13 US AQI0.2 times the WHO guideline▼39
=2484ShawiniganQuebec, Canada 13 US AQI0.2 times the WHO guideline▼886
not rankedViljandiViljandimaa, Estonia 13 US AQI0.2 times the WHO guideline
not rankedTienenFlanders, Belgium 13 US AQI0.2 times the WHO guideline
not rankedWolfratshausenBavaria, Germany 13 US AQI0.2 times the WHO guideline
not rankedMühlackerBaden-Wurttemberg, Germany 13 US AQI0.2 times the WHO guideline
not rankedMechernichNorth Rhine-Westphalia, Germany 13 US AQI0.2 times the WHO guideline
not rankedLehrteLower Saxony, Germany 13 US AQI0.2 times the WHO guideline
not rankedLangenLower Saxony, Germany 13 US AQI0.2 times the WHO guideline
not rankedEttlingenBaden-Wurttemberg, Germany 13 US AQI0.2 times the WHO guideline
not rankedClausthal-ZellerfeldLower Saxony, Germany 13 US AQI0.2 times the WHO guideline
not rankedBad LippspringeNorth Rhine-Westphalia, Germany 13 US AQI0.2 times the WHO guideline
not rankedPort Saint LucieFlorida, United States 13 US AQI0.2 times the WHO guideline
not rankedNapaCalifornia, United States 13 US AQI0.2 times the WHO guideline
=2506TartuTartu, Estonia 13 US AQI0.2 times the WHO guideline▼477
=2506HämeenkyläUusimaa, Finland 13 US AQI0.2 times the WHO guideline▲124
=2506KastoriaWest Macedonia, Greece 13 US AQI0.2 times the WHO guideline▼534
=2506RiemstFlanders, Belgium 13 US AQI0.2 times the WHO guideline▼33
=2506SarstedtLower Saxony, Germany 13 US AQI0.2 times the WHO guideline
=2506ChâteaurouxCentre-Val de Loire, France 13 US AQI0.2 times the WHO guideline▼370
=2506RijekaPrimorje-Gorski Kotar, Croatia 13 US AQI0.2 times the WHO guideline▲144
=2506Biograd na MoruZadar, Croatia 13 US AQI0.2 times the WHO guideline
=2506KralendijkBonaire, Bonaire, Saint Eustatius and Saba 13 US AQI0.2 times the WHO guideline▼261
=2506PortlandMaine, United States 13 US AQI0.2 times the WHO guideline▼311
=2506OjaiCalifornia, United States 13 US AQI0.2 times the WHO guideline▼127
=2506Idaho FallsIdaho, United States 13 US AQI0.2 times the WHO guideline
=2506BountifulUtah, United States 13 US AQI0.2 times the WHO guideline▼217
=2506Union GapWashington, United States 13 US AQI0.2 times the WHO guideline▲147
=2506FrederictonNew Brunswick, Canada 13 US AQI0.2 times the WHO guideline▲23
=2506Greater SudburyOntario, Canada 13 US AQI0.2 times the WHO guideline▼201
=2506MontréalQuebec, Canada 13 US AQI0.2 times the WHO guideline▼535
=2506Summerlin SouthNevada, United States 13 US AQI0.2 times the WHO guideline▼198
=2506KostelMunicipality of Kostel, Slovenia 13 US AQI0.2 times the WHO guideline▲84

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.

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 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).