All 3,291 cities by PM2.5, last 30 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.

=500MiaoliTaiwan, Taiwan 59 US AQI▼30
=500SuwonGyeonggi-do, South Korea 59 US AQI▼63
=500Anyang-siGyeonggi-do, South Korea 59 US AQI▼54
=500Santa Lucíalast full day 11 OctCanary Islands, Spain 59 US AQI
=500GyálPest County, Hungary 59 US AQI▼122
=500LitvínovÚstí nad Labem Region, Czechia 59 US AQI
=500FresnoCalifornia, United States 59 US AQI▼70
=500SinanJeollanam-do, South Korea 59 US AQI▼50
=509RadomMazovia, Poland 58 US AQI▼4
=509ShenzhenTaiwan, Taiwan 58 US AQI▼16
=511RzeszówSubcarpathia, Poland 58 US AQI▲34
=511KumanovoKumanovo, North Macedonia 58 US AQI▼80
=511PrayagrajUttar Pradesh, India 58 US AQI▼29
=511BuziTaiwan, Taiwan 58 US AQI▼35
=511Tsuen WanTsuen Wan, Hong Kong 58 US AQI▼27
=511AsanChungcheongnam-do, South Korea 58 US AQI▼72
=511HaenamJeollanam-do, South Korea 58 US AQI▼56
=511CheonanChungcheongnam-do, South Korea 58 US AQI▼82
=511Chinch'ŏnNorth Chungcheong, South Korea 58 US AQI▼50
=511Donghae CityGangwon-do, South Korea 58 US AQI▼39
=511HuelvaAndalusia, Spain 58 US AQI▼117
=511ŁódźŁódź Voivodeship, Poland 58 US AQI▲61
=511Mexico CityMexico City, Mexico 58 US AQI▼62
=511Atotonilco de TulaHidalgo, Mexico 58 US AQI▼48
=511TaoyuanTaiwan, Taiwan 58 US AQI▼8
=526MiddelburgMpumalanga, South Africa 58 US AQI▼61
=526Hartbeespoortlast full day 8 OctNorth West, South Africa 58 US AQI▼100
=526WaegwanGyeongsangbuk-do, South Korea 58 US AQI▼58
=526NonsanChungcheongnam-do, South Korea 58 US AQI▼81
=526MunsanGyeonggi-do, South Korea 58 US AQI▼66
=526Imperial BeachCalifornia, United States 58 US AQI▼85
=532Dejlast full day 10 OctCluj County, Romania 58 US AQI▼74
=532ČaňaKošice Region, Slovakia 58 US AQI▼80
=532Chiang MaiChiang Mai, Thailand 58 US AQI▼73
=532SaraburiSaraburi, Thailand 58 US AQI▼58
=532MiamiOklahoma, United States 58 US AQI▼59
=537SangjuGyeongsangbuk-do, South Korea 58 US AQI▼66
=537RiversideCalifornia, United States 58 US AQI▼81
=537Sai MaiBangkok, Thailand 58 US AQI▼48
=540Jilavalast full day 10 OctIlfov, Romania 58 US AQI▼1
=540Roi EtRoi Et, Thailand 58 US AQI▼65
=540Amnat CharoenAmnat Charoen, Thailand 58 US AQI▼57
=540TaipeiTaiwan, Taiwan 58 US AQI▼18
=540SuncheonJeollanam-do, South Korea 58 US AQI▼55
=540JeonjuJeollabuk-do, South Korea 58 US AQI▼52
=540AbidjanAbidjan Autonomous District, Ivory Coast 58 US AQI▼61
=540Czechowice-DziedziceSilesia, Poland 58 US AQI▲219
=540Ciudad ApodacaNuevo León, Mexico 58 US AQI▼31
=549Popeşti-Leordenilast full day 10 OctIlfov, Romania 57 US AQI▼11
=549KalasinKalasin, Thailand 57 US AQI▼57
=549Bucheon-siGyeonggi-do, South Korea 57 US AQI▼63
=549NangenJeollabuk-do, South Korea 57 US AQI▼71
=549Saronnolast full day 11 OctLombardy, Italy 57 US AQI
=554BitolaBitola, North Macedonia 57 US AQI▼53
=554MokopaneLimpopo, South Africa 57 US AQI▼73
=554CenturionGauteng, South Africa 57 US AQI▼164
=554TrangTrang, Thailand 57 US AQI▼58
=554Udon ThaniUdon Thani, Thailand 57 US AQI▼47
=554PhatthalungPhatthalung, Thailand 57 US AQI▼52
=554ShulinTaipei, Taiwan 57 US AQI▼24
=554Hwaseong-siGyeonggi-do, South Korea 57 US AQI▼67
=554Bielsko-BialaSilesia, Poland 57 US AQI▲134
=554BresciaLombardy, Italy 57 US AQI
=564LublinLublin, Poland 57 US AQI▲5
=564KielceŚwiętokrzyskie, Poland 57 US AQI▲66
=564JarosławSubcarpathia, Poland 57 US AQI▲67
=564Mueang NonthaburiNonthaburi, Thailand 57 US AQI▼54
=564VictoriaCentral and Western, Hong Kong 57 US AQI▼22
=564ZgierzŁódź Voivodeship, Poland 57 US AQI▲98
=564SejongSejong-si, South Korea 57 US AQI▼74
=571Calafatlast full day 10 OctDolj, Romania 57 US AQI▼72
=571ZhudongTaiwan, Taiwan 57 US AQI▼30
=571Koch'angJeollabuk-do, South Korea 57 US AQI▼59
=571BailénAndalusia, Spain 57 US AQI
=571OmegnaPiedmont, Italy 57 US AQI
=576BeirutBeirut, Lebanon 57 US AQI▼85
=576Buftealast full day 10 OctIlfov, Romania 57 US AQI▲2
=576TongyeongGyeongsangnam-do, South Korea 57 US AQI▼68
=576PřerovOlomouc Region, Czechia 57 US AQI
=576CieszynSilesia, Poland 57 US AQI
=576AcerraCampania, Italy 57 US AQI
=576SarajevoFederation of B&H, Bosnia and Herzegovina 57 US AQI▼78
=576New Taipei CityTaipei, Taiwan 57 US AQI▲1
=584Nong ChokBangkok, Thailand 56 US AQI▼56
=584Lop BuriLopburi, Thailand 56 US AQI▼63
=584HsinchuTaiwan, Taiwan 56 US AQI▼38
=584OlomoucOlomouc Region, Czechia 56 US AQI
=584São José do Rio PretoSão Paulo, Brazil 56 US AQI▼59
=589KrompachyKošice Region, Slovakia 56 US AQI▼89
=589PołaniecŚwiętokrzyskie, Poland 56 US AQI▲34
=589Kamphaeng PhetKamphaeng Phet, Thailand 56 US AQI▼69
=589Chai NatChai Nat, Thailand 56 US AQI▼49
=589Uijeongbu-siGyeonggi-do, South Korea 56 US AQI▼76
=589GwangjuGwangju, South Korea 56 US AQI▼75
=589ChungjuNorth Chungcheong, South Korea 56 US AQI▼74
=589DěčínÚstí nad Labem Region, Czechia 56 US AQI
=589PoznańGreater Poland, Poland 56 US AQI▲119
=598LamphunLamphun, Thailand 56 US AQI▼79
=598Uthai ThaniUthai Thani, Thailand 56 US AQI▼71
=598Maha SarakhamMaha Sarakham, Thailand 56 US AQI▼69

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 30 days to 14 Oct 2026, 06:00 UTC: each city's mean of its daily means, cities measured on 21 or more of the 30 days. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=30d. Ranked on low-cost sensors, with no reference monitor in the city: #1 Kasur, #2 Gujranwala, #3 Kuala Lumpur, #5 Lahore, #6 Faisalabad, #9 Peshawar and #10 Dhaka. Some values from Sensor.Community, ODbL. Some readings from Vietnam's government monitors; 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 low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Vietnam's government monitors; 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).