All 3,198 cities by PM2.5, this year

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.

=401KavadarciKavadarci, North Macedonia 69 US AQI3.7 times the WHO guideline▼31
=401PyeongtaekGyeonggi-do, South Korea 69 US AQI3.7 times the WHO guideline▼2
=401IksanJeollabuk-do, South Korea 69 US AQI3.7 times the WHO guideline▼1
=401SejongSejong-si, South Korea 69 US AQI3.7 times the WHO guideline▲1
=405Strumicalast full day 10 OctStrumica, North Macedonia 69 US AQI3.7 times the WHO guideline▼1
=405AranyaprathetSa Kaeo, Thailand 69 US AQI3.7 times the WHO guideline
=405SeoulSeoul, South Korea 69 US AQI3.7 times the WHO guideline▲1
=405MariglianoCampania, Italy 69 US AQI3.7 times the WHO guideline
=409Miskolclast full day 21 SeptBorsod-Abaúj-Zemplén, Hungary 68 US AQI3.7 times the WHO guideline▼2
=409VelesVeles, North Macedonia 68 US AQI3.7 times the WHO guideline
=409NaduvattamTamil Nadu, India 68 US AQI3.7 times the WHO guideline▼19
=409Si Sa KetSi Sa Ket, Thailand 68 US AQI3.7 times the WHO guideline▼1
=409Sakon NakhonSakon Nakhon, Thailand 68 US AQI3.7 times the WHO guideline▲1
=409CheorwonGangwon-do, South Korea 68 US AQI3.7 times the WHO guideline
=415YeongjuGyeongsangbuk-do, South Korea 68 US AQI3.6 times the WHO guideline▼3
=415SangjuGyeongsangbuk-do, South Korea 68 US AQI3.6 times the WHO guideline▼4
=415WrocławLower Silesia, Poland 68 US AQI3.6 times the WHO guideline▼18
=418Guri-siGyeonggi-do, South Korea 68 US AQI3.6 times the WHO guideline▼4
=418Ganghwa-gunIncheon, South Korea 68 US AQI3.6 times the WHO guideline▼3
=418Milanlast full day 11 OctLombardy, Italy 68 US AQI3.6 times the WHO guideline
=418Yongsan-dongSeoul, South Korea 68 US AQI3.6 times the WHO guideline▼2
=422RzeszówSubcarpathia, Poland 68 US AQI3.6 times the WHO guideline▼53
=422TetovoTetovo, North Macedonia 68 US AQI3.6 times the WHO guideline▼5
=422Gevgelijalast full day 10 OctGevgelija, North Macedonia 68 US AQI3.6 times the WHO guideline▼4
=422KoesanNorth Chungcheong, South Korea 68 US AQI3.6 times the WHO guideline▼3
=422Ansan-siGyeonggi-do, South Korea 68 US AQI3.6 times the WHO guideline▼2
=422NilópolisRio de Janeiro, Brazil 68 US AQI3.6 times the WHO guideline▲1
=422Mixquiahuala de JuárezHidalgo, Mexico 68 US AQI3.6 times the WHO guideline▼1
=429KrompachyKošice Region, Slovakia 67 US AQI3.6 times the WHO guideline
=429ZamośćLublin, Poland 67 US AQI3.6 times the WHO guideline▼26
=429OkcheonNorth Chungcheong, South Korea 67 US AQI3.6 times the WHO guideline▼7
=429Frýdek-MístekMoravian-Silesian Region, Czechia 67 US AQI3.6 times the WHO guideline
=429HuascoAtacama, Chile 67 US AQI3.6 times the WHO guideline▲10
=434Bucheon-siGyeonggi-do, South Korea 67 US AQI3.6 times the WHO guideline▼4
=434OsanGyeonggi-do, South Korea 67 US AQI3.6 times the WHO guideline▼3
=434Sannazzaro de' BurgondiLombardy, Italy 67 US AQI3.6 times the WHO guideline
=434AcerraCampania, Italy 67 US AQI3.6 times the WHO guideline
=438PrešovPrešov Region, Slovakia 67 US AQI3.5 times the WHO guideline
=438StarachowiceŚwiętokrzyskie, Poland 67 US AQI3.5 times the WHO guideline▼54
=438Buri RamBuriram, Thailand 67 US AQI3.5 times the WHO guideline▼10
=438FanlingNorth District, Hong Kong 67 US AQI3.5 times the WHO guideline▼4
=438WŏnjuGangwon-do, South Korea 67 US AQI3.5 times the WHO guideline▼9
=438Icheon-siGyeonggi-do, South Korea 67 US AQI3.5 times the WHO guideline▼6
=438KrakówLesser Poland, Poland 67 US AQI3.5 times the WHO guideline▼75
=438Gorzów WielkopolskiLubusz, Poland 67 US AQI3.5 times the WHO guideline▼137
=438Zacatepec de HidalgoMorelos, Mexico 67 US AQI3.5 times the WHO guideline▼5
=438San MarcosHidalgo, Mexico no daily values yet67 US AQI3.5 times the WHO guideline
=448KinzanChungcheongnam-do, South Korea 67 US AQI3.5 times the WHO guideline▼13
=448CheonanChungcheongnam-do, South Korea 67 US AQI3.5 times the WHO guideline▼12
=448Santa AnitaJalisco, Mexico 67 US AQI3.5 times the WHO guideline▼8
=448MexicaliBaja California, Mexico 67 US AQI3.5 times the WHO guideline▼129
=452SkopjeGrad Skopje, North Macedonia 67 US AQI3.5 times the WHO guideline▼25
=452KohimaNagaland, India 67 US AQI3.5 times the WHO guideline▼11
=452FengshanTakao, Taiwan 67 US AQI3.5 times the WHO guideline▼10
=452Hwaseong-siGyeonggi-do, South Korea 67 US AQI3.5 times the WHO guideline▼9
=456Samut PrakanSamut Prakan, Thailand 66 US AQI3.5 times the WHO guideline▼12
=456NamsaJeollabuk-do, South Korea 66 US AQI3.5 times the WHO guideline▼11
=456Goyang-siGyeonggi-do, South Korea 66 US AQI3.5 times the WHO guideline▼10
=456Chinch'ŏnNorth Chungcheong, South Korea 66 US AQI3.5 times the WHO guideline▼9
=456YŏnmuChungcheongnam-do, South Korea 66 US AQI3.5 times the WHO guideline▼8
=456AlessandriaPiedmont, Italy 66 US AQI3.5 times the WHO guideline
=456Celayalast full day 11 OctGuanajuato, Mexico 66 US AQI3.5 times the WHO guideline▼7
=456VinovoPiedmont, Italy 66 US AQI3.5 times the WHO guideline
=464Baia MareMaramureş, Romania 66 US AQI3.5 times the WHO guideline▼14
=464DębicaSubcarpathia, Poland 66 US AQI3.5 times the WHO guideline▼79
=464SuwonGyeonggi-do, South Korea 66 US AQI3.5 times the WHO guideline▼13
=464ChungjuNorth Chungcheong, South Korea 66 US AQI3.5 times the WHO guideline▼12
=464WabuGyeonggi-do, South Korea 66 US AQI3.5 times the WHO guideline▼11
=464KarvináMoravian-Silesian Region, Czechia 66 US AQI3.5 times the WHO guideline
=470WaegwanGyeongsangbuk-do, South Korea 66 US AQI3.4 times the WHO guideline▼15
=470Anyang-siGyeonggi-do, South Korea 66 US AQI3.4 times the WHO guideline▼14
=470AnseongGyeonggi-do, South Korea 66 US AQI3.4 times the WHO guideline▼13
=470OstravaMoravian-Silesian Region, Czechia 66 US AQI3.4 times the WHO guideline
=474BelgradeCentral Serbia, Serbia 66 US AQI3.4 times the WHO guideline▲114
=474Santa CatarinaNuevo León, Mexico 66 US AQI3.4 times the WHO guideline▼14
=474Ciudad General EscobedoNuevo León, Mexico 66 US AQI3.4 times the WHO guideline▼13
=477Bang PakongChachoengsao, Thailand 66 US AQI3.4 times the WHO guideline▼13
=477Cheongju-siNorth Chungcheong, South Korea 66 US AQI3.4 times the WHO guideline▼10
=477ToruńKujawsko-Pomorskie, Poland 66 US AQI3.4 times the WHO guideline▼76
=480RadomMazovia, Poland 66 US AQI3.4 times the WHO guideline▼54
=480NiskoSubcarpathia, Poland 66 US AQI3.4 times the WHO guideline▼67
=480Tin Shui WaiYuen Long, Hong Kong 66 US AQI3.4 times the WHO guideline▼11
=480BoryeongChungcheongnam-do, South Korea 66 US AQI3.4 times the WHO guideline▼15
=480MasanGwangju, South Korea 66 US AQI3.4 times the WHO guideline▼14
=480NovaraPiedmont, Italy 66 US AQI3.4 times the WHO guideline
=480CrescentinoPiedmont, Italy 66 US AQI3.4 times the WHO guideline
=487KikindaVojvodina, Serbia 65 US AQI3.4 times the WHO guideline▲118
=487MadikeriKarnataka, India 65 US AQI3.4 times the WHO guideline▼15
=487DouliuTaiwan, Taiwan 65 US AQI3.4 times the WHO guideline▼14
=487GumiGyeongsangbuk-do, South Korea 65 US AQI3.4 times the WHO guideline▼17
=487HanamGyeonggi-do, South Korea 65 US AQI3.4 times the WHO guideline▼12
=487Valašské MeziříčíZlín, Czechia 65 US AQI3.4 times the WHO guideline
=487ŁódźŁódź Voivodeship, Poland 65 US AQI3.4 times the WHO guideline▼50
=494Sham Shui PoSham Shui Po District, Hong Kong 65 US AQI3.3 times the WHO guideline▼18
=494MunsanGyeonggi-do, South Korea 65 US AQI3.3 times the WHO guideline▼16
=494TurinPiedmont, Italy 65 US AQI3.3 times the WHO guideline
=497PruszkówMazovia, Poland 65 US AQI3.3 times the WHO guideline▼35
=497JinchengFukien, Taiwan 65 US AQI3.3 times the WHO guideline▼18
=497Uijeongbu-siGyeonggi-do, South Korea 65 US AQI3.3 times the WHO guideline▼17
=497SinhyeonGyeongsangnam-do, South Korea 65 US AQI3.3 times the WHO guideline▼23

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), this year to 14 Oct 2026, 06:00 UTC: each city's mean of its daily means, cities measured on 70% or more of the days since 1 January (at least 14). Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=year. Ranked on low-cost sensors, with no reference monitor in the city: #2 Faisalabad, #3 Gujranwala and #6 Lahore. Some values from Sensor.Community, ODbL. Some readings from Department of Environment, Nepal; Vietnam's government monitors; 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 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: Department of Environment, Nepal; Vietnam's government monitors; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).