All 2,894 cities by PM2.5, last 7 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.

Hide the 297 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.

=2620ChesterfieldEngland, United Kingdom 19 US AQI▼64
=2620Burton upon TrentEngland, United Kingdom 19 US AQI▼34
=2620TallaghtLeinster, Ireland 19 US AQI▲63
=2620SwordsLeinster, Ireland 19 US AQI▲118
=2620NeversBourgogne-Franche-Comté, France 19 US AQI▼25
=2620La Ferté-MacéNormandy, France 19 US AQI▼57
=2620BourgesCentre-Val de Loire, France 19 US AQI▼123
=2620BastiaCorsica, France 19 US AQI▼54
=2620BarBar, Montenegro 19 US AQI▼121
=2620GreenfieldMassachusetts, United States 19 US AQI▲140
=2620LynnMassachusetts, United States 19 US AQI▲207
=2620North AdamsMassachusetts, United States 19 US AQI▲157
=2620QuincyMassachusetts, United States 19 US AQI▲208
=2620UxbridgeMassachusetts, United States 19 US AQI▲209
=2620WorcesterMassachusetts, United States 19 US AQI▲173
=2620LompocCalifornia, United States 19 US AQI▲143
=2620TaosNew Mexico, United States 19 US AQI▲53
=2620VernalUtah, United States 19 US AQI▲55
=2620FairwoodWashington, United States 19 US AQI▼108
=2620QuincyWashington, United States 19 US AQI▼44
=2620EdsonAlberta, Canada 19 US AQI▲71
=2620MontréalQuebec, Canada 19 US AQI▲73
=2620NanaimoBritish Columbia, Canada 19 US AQI▼71
=2620Saint John EastNew Brunswick, Canada 19 US AQI▲108
=2620Oxon Hill-GlassmanorMaryland, United States 19 US AQI▲74
not rankedFrederickMaryland, United States 19 US AQI
not rankedMentorOhio, United States 19 US AQI
not rankedSanta FeNew Mexico, United States 19 US AQI
=2657Saint-PaulReunion, Reunion 19 US AQI▼4
=2657CacémLisbon, Portugal 19 US AQI▲112
=2657Southend-on-SeaEngland, United Kingdom 19 US AQI▼3
=2657PeterboroughEngland, United Kingdom 19 US AQI▼2
=2657GreenockScotland, United Kingdom 19 US AQI▼47
=2657FarnboroughEngland, United Kingdom 19 US AQI▲77
=2657BirminghamEngland, United Kingdom 19 US AQI▼235
=2657AylesburyEngland, United Kingdom 19 US AQI▲44
=2657ZierenbergHesse, Germany 19 US AQI▼68
=2657GärtringenBaden-Wurttemberg, Germany 19 US AQI▼20
=2657FürthHesse, Germany 19 US AQI▲3
=2657Baden-BadenBaden-Wurttemberg, Germany 19 US AQI▼99
=2657BloisCentre-Val de Loire, France 19 US AQI▼196
=2657Cangas del Narcealast full day 11 OctAsturias, Spain 19 US AQI
=2657LowellMassachusetts, United States 19 US AQI▲119
=2657PortlandMaine, United States 19 US AQI▲54
=2657AlamosaColorado, United States 19 US AQI▼54
=2657Gardnerville RanchosNevada, United States 19 US AQI▲123
=2657BoulderColorado, United States 19 US AQI▲59
=2657AberdeenWashington, United States 19 US AQI▲63
=2657Mount VernonWashington, United States 19 US AQI▲64
=2657Port TownsendWashington, United States 19 US AQI▲109
=2657Rock SpringsWyoming, United States 19 US AQI▲66
=2657Greater SudburyOntario, Canada 19 US AQI▲35
=2657OttawaOntario, Canada 19 US AQI▲70
=2657PeterboroughOntario, Canada 19 US AQI▲189
=2657Summerlin SouthNevada, United States 19 US AQI▲38
=2657KostelMunicipality of Kostel, Slovenia 19 US AQI▼306
=2657AintreeVictoria, Australia 19 US AQI
not rankedStourbridgeEngland, United Kingdom 19 US AQI
not rankedRobertsonWestern Cape, South Africa 19 US AQI
=2686SantanaMadeira, Portugal 18 US AQI▼55
=2686Royal Leamington SpaEngland, United Kingdom 18 US AQI▲47
=2686RodezOccitanie, France 18 US AQI▼160
=2686FontainebleauÎle-de-France, France 18 US AQI▼69
=2686ÉtampesÎle-de-France, France 18 US AQI▼159
=2686CastresOccitanie, France 18 US AQI▼121
=2686MarigotSaint Martin 18 US AQI▲89
=2686CambridgeMaryland, United States 18 US AQI▲70
=2686AugustaMaine, United States 18 US AQI▲24
=2686Hood RiverOregon, United States 18 US AQI▼12
=2686McMinnvilleOregon, United States 18 US AQI▲32
=2686CasperWyoming, United States 18 US AQI▲4
=2686CodyWyoming, United States 18 US AQI▼10
=2686CornwallOntario, Canada 18 US AQI▲81
=2686Prince AlbertSaskatchewan, Canada 18 US AQI▲61
not rankedAltonEngland, United Kingdom 18 US AQI
not rankedCastaicCalifornia, United States 18 US AQI
=2701WorcesterEngland, United Kingdom 18 US AQI▲48
=2701StreetEngland, United Kingdom 18 US AQI▲102
=2701MiddlesbroughEngland, United Kingdom 18 US AQI▼3
=2701Cheadle HulmeEngland, United Kingdom 18 US AQI▲50
=2701GreystonesLeinster, Ireland 18 US AQI▲71
=2701TroyesGrand Est, France 18 US AQI▲38
=2701PauNew Aquitaine, France 18 US AQI▼38
=2701AuriolProvence-Alpes-Côte d'Azur, France 18 US AQI▼17
=2701FraminghamMassachusetts, United States 18 US AQI▲159
=2701OjaiCalifornia, United States 18 US AQI▲45
=2701PriceUtah, United States 18 US AQI▼49
=2701MeadWashington, United States 18 US AQI▼76
=2701WenatcheeWashington, United States 18 US AQI▲21
=2701WorlandWyoming, United States 18 US AQI▲23
=2701KingstonOntario, Canada 18 US AQI▲143
not rankedÅkersbergaStockholm, Sweden 18 US AQI
not rankedLa PazLa Paz Department, Bolivia 18 US AQI
=2716LappeenrantaSouth Karelia, Finland 17 US AQI▲106
=2716LourinhãLisbon, Portugal 17 US AQI▲69
=2716SwindonEngland, United Kingdom 17 US AQI▲121
=2716ReadingEngland, United Kingdom 17 US AQI▲70
=2716Milton KeynesEngland, United Kingdom 17 US AQI▲54
=2716IrlamEngland, United Kingdom 17 US AQI▲55
=2716CannockEngland, United Kingdom 17 US AQI▲36

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

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 7 days to 14 Oct 2026, 06:00 UTC: each city's mean of its daily means, cities measured on 5 or more of the 7 days. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=7d. Ranked on low-cost sensors, with no reference monitor in the city: #1 Kuala Lumpur, #3 Dhaka, #4 Faisalabad, #5 Kasur, #6 Gujranwala, #7 Lahore, #8 Peshawar, #9 Multan and #10 Jakarta. Some readings from Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); 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 readings: Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); 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).