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.

=598Sha TinSha Tin, Hong Kong 56 US AQI▼18
=598Laem ChabangChon Buri, Thailand 56 US AQI▼65
=598PraguePrague, Czechia 56 US AQI
=598BerounCentral Bohemia, Czechia 56 US AQI
=598ToruńKujawsko-Pomorskie, Poland 56 US AQI▼3
=598BydgoszczKujawsko-Pomorskie, Poland 56 US AQI▲8
=598SolofraCampania, Italy 56 US AQI▼74
=598AostaAosta Valley, Italy 56 US AQI▼136
=598Parque Industrial Ciudad Mitraslast full day 8 OctNuevo León, Mexico 56 US AQI▼81
=610LegionowoMazovia, Poland 56 US AQI▲46
=610WŏnjuGangwon-do, South Korea 56 US AQI▼63
=610SeosanChungcheongnam-do, South Korea 56 US AQI▼99
=610MiryangGyeongsangnam-do, South Korea 56 US AQI▼61
=610SinhyeonGyeongsangnam-do, South Korea 56 US AQI▼79
=610HanamGyeonggi-do, South Korea 56 US AQI▼78
=610OstravaMoravian-Silesian Region, Czechia 56 US AQI
=610Mladá BoleslavCentral Bohemia, Czechia 56 US AQI
=610KrakówLesser Poland, Poland 56 US AQI▲117
=610BrzegOpole Voivodeship, Poland 56 US AQI▲214
=610ShreveportLouisiana, United States 56 US AQI▼73
=621Iaşilast full day 10 OctIași County, Romania 56 US AQI▼10
=621MielecSubcarpathia, Poland 56 US AQI▲143
=621KavadarciKavadarci, North Macedonia 56 US AQI▼103
=621ThiruvananthapuramKerala, India 56 US AQI▼200
=621UttaraditUttaradit, Thailand 56 US AQI▼95
=621Mahlowlast full day 10 OctBrandenburg, Germany 56 US AQI
=621Sainte-Geneviève-des-BoisÎle-de-France, France 56 US AQI
=621BorgomaneroPiedmont, Italy 56 US AQI▼86
=629Bragadirulast full day 10 OctIlfov, Romania 55 US AQI▼17
=629PhayaoPhayao, Thailand 55 US AQI▼76
=629MagongTaiwan, Taiwan 55 US AQI▼50
=629DaejeonDaejeon, South Korea 55 US AQI▼81
=629Wodzisław ŚląskiSilesia, Poland 55 US AQI
=629VigoGalicia, Spain 55 US AQI▼44
=629Irapuatolast full day 11 OctGuanajuato, Mexico 55 US AQI▼71
=629Celayalast full day 11 OctGuanajuato, Mexico 55 US AQI▼93
=629BoseongJeollanam-do, South Korea 55 US AQI▼78
=638PrešovPrešov Region, Slovakia 55 US AQI▼94
=638HonmachiKumamoto, Japan 55 US AQI▼75
=638GyőrGyőr-Moson-Sopron, Hungary 55 US AQI▼67
=638São PauloSão Paulo, Brazil 55 US AQI▼72
=638Little RockArkansas, United States 55 US AQI▼79
=638MurraysvilleNorth Carolina, United States 55 US AQI▼88
=644WawerMazovia, Poland 55 US AQI▲74
=644Taesal-liChungcheongnam-do, South Korea 55 US AQI▼90
=644HwawŏnDaegu, South Korea 55 US AQI▼80
=644MariglianoCampania, Italy 55 US AQI▼79
=644YeongamJeollanam-do, South Korea 55 US AQI▼84
=649Nong Bua LamphuNong Bua Lamphu, Thailand 55 US AQI▼48
=649SintansinDaejeon, South Korea 55 US AQI▼88
=649KwangyangJeollanam-do, South Korea 55 US AQI▼79
=649PłockMazovia, Poland 55 US AQI▲31
=649ItaquaquecetubaSão Paulo, Brazil 55 US AQI▼74
=649León de los AldamaGuanajuato, Mexico 55 US AQI▼92
=649FontanaCalifornia, United States 55 US AQI▼106
=656Voluntarilast full day 10 OctIlfov, Romania 55 US AQI▲38
=656Konstancin-JeziornaMazovia, Poland 55 US AQI▲58
=656BuyeoChungcheongnam-do, South Korea 55 US AQI▼94
=656Ōyanomachi-noboritateKumamoto, Japan 55 US AQI▼74
=656WabuGyeonggi-do, South Korea 55 US AQI▼52
=656HavířovMoravian-Silesian Region, Czechia 55 US AQI
=656Salamancalast full day 11 OctGuanajuato, Mexico 55 US AQI▼80
=656MaderaCalifornia, United States 55 US AQI▼69
=656ChangnyeongGyeongsangnam-do, South Korea 55 US AQI▼88
=665Holbocalast full day 10 OctIași County, Romania 55 US AQI▼76
=665Baia MareMaramureş, Romania 55 US AQI▼66
=665Buri RamBuriram, Thailand 55 US AQI▼52
=665DaeguDaegu, South Korea 55 US AQI▼75
=665SokchoGangwon-do, South Korea 55 US AQI▼74
=665PohangGyeongsangbuk-do, South Korea 55 US AQI▼63
=665Gyeongsan-siGyeongsangbuk-do, South Korea 55 US AQI▼73
=665GwangjuGyeonggi-do, South Korea 55 US AQI▼84
=665HwadoGyeonggi-do, South Korea 55 US AQI▼46
=665DakarDakar, Senegal 55 US AQI▼71
=665ComoLombardy, Italy 55 US AQI
=665ZapopanJalisco, Mexico 55 US AQI▼56
=665WhittierCalifornia, United States 55 US AQI▼98
=665Somerset Westlast full day 8 OctWestern Cape, South Africa 55 US AQI▼77
=679ChaniáCrete, Greece 54 US AQI
=679AcharnésAttica, Greece 54 US AQI▼81
=679RuseRuse, Bulgaria 54 US AQI▼127
=679BiałystokPodlasie, Poland 54 US AQI▲52
=679PhraePhrae, Thailand 54 US AQI▼79
=679GimcheonGyeongsangbuk-do, South Korea 54 US AQI▼86
=679ŌzuKumamoto, Japan 54 US AQI▼61
=679HitaOita, Japan 54 US AQI▼96
=679NamyangjuGyeonggi-do, South Korea 54 US AQI▼59
=679GrazStyria, Austria 54 US AQI▼58
=679TepliceÚstí nad Labem Region, Czechia 54 US AQI
=679KladnoCentral Bohemia, Czechia 54 US AQI
=679Leccolast full day 11 OctLombardy, Italy 54 US AQI
=679OwariasahiAichi, Japan 54 US AQI▼25
=693WarsawMazovia, Poland 54 US AQI▲4
=693KrosnoSubcarpathia, Poland 54 US AQI▲53
=693JasłoSubcarpathia, Poland 54 US AQI▲123
=693Chiang RaiChiang Rai, Thailand 54 US AQI▼61
=693DaxiTaiwan, Taiwan 54 US AQI▼10
=693YilanTaiwan, Taiwan 54 US AQI▲6
=693KeelungTaiwan, Taiwan 54 US AQI▲7
=693GongjuChungcheongnam-do, South Korea 54 US AQI▼58

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).