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.

=801KaragandyKaraganda, Kazakhstan 53 US AQI▲149
=801KuryeJeollanam-do, South Korea 53 US AQI▼117
=801TřinecMoravian-Silesian Region, Czechia 53 US AQI
=801OceansideCalifornia, United States 53 US AQI▼120
=805Vranov nad TopľouPrešov Region, Slovakia 53 US AQI▼110
=805KošiceKošice Region, Slovakia 53 US AQI▼109
=805Prileplast full day 10 OctPrilep, North Macedonia 53 US AQI▼90
=805ChaiyaphumChaiyaphum, Thailand 53 US AQI▼54
=805ŌmutaFukuoka, Japan 53 US AQI▼83
=805OkazakiAichi, Japan 53 US AQI▼38
=805KumamotoKumamoto, Japan 53 US AQI▼89
=805MartinŽilina Region, Slovakia 53 US AQI▼65
=805Castano PrimoLombardy, Italy 53 US AQI
=805WorcesterWestern Cape, South Africa 53 US AQI▼94
=805Wake ForestNorth Carolina, United States 53 US AQI▼10
=805MiddletownOhio, United States 53 US AQI▼62
=817CiechanówMazovia, Poland 52 US AQI▲33
=817Sakon NakhonSakon Nakhon, Thailand 52 US AQI▼67
=817ChanthaburiChanthaburi, Thailand 52 US AQI▼85
=817ToufenTaiwan, Taiwan 52 US AQI▼17
=817YeonilGyeongsangbuk-do, South Korea 52 US AQI▼98
=817UlsanUlsan, South Korea 52 US AQI▼83
=817BusanBusan, South Korea 52 US AQI▼82
=817UtoKumamoto, Japan 52 US AQI▼97
=817TamanaKumamoto, Japan 52 US AQI▼96
=817IzumiKagoshima, Japan 52 US AQI▼94
=817BeppuOita, Japan 52 US AQI▼49
=817WolfsbergCarinthia, Austria 52 US AQI▼93
=817Ústí nad LabemÚstí nad Labem Region, Czechia 52 US AQI
=817GdańskPomerania, Poland 52 US AQI▼108
=817CasertaCampania, Italy 52 US AQI▼107
=817BirminghamAlabama, United States 52 US AQI▼32
=817Chula VistaCalifornia, United States 52 US AQI▼104
=834Hua HinPrachuap Khiri Khan, Thailand 52 US AQI▼86
=834ChumphonChumphon, Thailand 52 US AQI▼85
=834KinzanChungcheongnam-do, South Korea 52 US AQI▼82
=834SendaiKagoshima, Japan 52 US AQI▼81
=834NobeokaMiyazaki, Japan 52 US AQI▼80
=834KikuchiKumamoto, Japan 52 US AQI▼98
=834KanoyaKagoshima, Japan 52 US AQI▼97
=834Kędzierzyn-KoźleOpole Voivodeship, Poland 52 US AQI▲452
=834WyomingMichigan, United States 52 US AQI▼73
=843Strumicalast full day 10 OctStrumica, North Macedonia 52 US AQI▼96
=843Nichinanlast full day 10 OctMiyazaki, Japan 52 US AQI▼66
=843KariyaAichi, Japan 52 US AQI▼40
=843KagoshimaKagoshima, Japan 52 US AQI▼65
=843SaijōEhime, Japan 52 US AQI▼105
=843Murcialast full day 11 OctMurcia, Spain 52 US AQI
=843RoubaixHauts-de-France, France 52 US AQI▼87
=843TrenčínTrenčín Region, Slovakia 52 US AQI▼117
=843HraniceOlomouc Region, Czechia 52 US AQI
=843Jelenia GóraLower Silesia, Poland 52 US AQI▲325
=843ZarautzBasque Country, Spain 52 US AQI▼83
=843BilbaoBasque Country, Spain 52 US AQI▼102
=843SaldanhaWestern Cape, South Africa 52 US AQI▼115
=843Cape Townlast full day 8 OctWestern Cape, South Africa 52 US AQI▼101
=843Mixquiahuala de JuárezHidalgo, Mexico 52 US AQI▼49
=843CarsonCalifornia, United States 52 US AQI▼114
=843PortervilleCalifornia, United States 52 US AQI▼80
=843TurlockCalifornia, United States 52 US AQI▼99
=843KaniGifu, Japan 52 US AQI▼30
=862Cluj-Napocalast full day 10 OctCluj County, Romania 52 US AQI▼87
=862YasothonYasothon, Thailand 52 US AQI▼97
=862YeongdongNorth Chungcheong, South Korea 52 US AQI▼96
=862TokonameAichi, Japan 52 US AQI▼43
=862El Planlast full day 11 OctMurcia, Spain 52 US AQI
=862Flémalle-HauteWallonia, Belgium 52 US AQI▼93
=862DunaújvárosFejér, Hungary 52 US AQI▼105
=862SereďTrnava Region, Slovakia 52 US AQI▼92
=862SenecBratislava Region, Slovakia 52 US AQI▼123
=862NitraNitra Region, Slovakia 52 US AQI▼104
=862WschowaLubusz, Poland 52 US AQI▲387
=862Szczytnalast full day 11 OctLower Silesia, Poland 52 US AQI▲119
=862DurangoBasque Country, Spain 52 US AQI
=862Cava Dè TirreniCampania, Italy 52 US AQI▼55
=862TulsaOklahoma, United States 52 US AQI▼75
=862KirishimaKagoshima, Japan 52 US AQI▼63
=862GeojeGyeongsangnam-do, South Korea 52 US AQI▼88
=862TōkaiAichi, Japan 52 US AQI▼32
=880EłkWarmia-Masuria, Poland 52 US AQI▲45
=880JangseongJeollanam-do, South Korea 52 US AQI▼104
=880IwashitaKumamoto, Japan 52 US AQI▼76
=880FukuyamaHiroshima, Japan 52 US AQI▼101
=880Alcantarillalast full day 11 OctMurcia, Spain 52 US AQI
=880Gelsenkirchenlast full day 10 OctNorth Rhine-Westphalia, Germany 52 US AQI
=880Augsburglast full day 10 OctBavaria, Germany 52 US AQI▼125
=880SlatinaSouth Moravian, Czechia 52 US AQI
=880RacibórzSilesia, Poland 52 US AQI▲405
=880LjubljanaLjubljana, Slovenia 52 US AQI▼72
=880PaulíniaSão Paulo, Brazil 52 US AQI▼87
=880BauruSão Paulo, Brazil 52 US AQI▼96
=880TulancingoHidalgo, Mexico 52 US AQI▼108
=880Yuba CityCalifornia, United States 52 US AQI▼82
=880MatsusakaMie, Japan 52 US AQI▼51
=895NishioAichi, Japan 52 US AQI▼42
=895San RoqueAndalusia, Spain 52 US AQI▼114
=895Valašské MeziříčíZlín, Czechia 52 US AQI
=895NaplesCampania, Italy 52 US AQI▼112
=895Oklahoma CityOklahoma, United States 52 US AQI▼109
=895InglewoodCalifornia, United States 52 US AQI▼133

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).