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.

=301RaipurChhattisgarh, India 77 US AQI4.6 times the WHO guideline▲3
=301Ban Thai TanAng Thong, Thailand 77 US AQI4.6 times the WHO guideline▼2
=301SeonghwanChungcheongnam-do, South Korea 77 US AQI4.6 times the WHO guideline▼1
=304Dejlast full day 10 OctCluj County, Romania 77 US AQI4.6 times the WHO guideline▼2
=304Nong KhaemBangkok, Thailand 77 US AQI4.6 times the WHO guideline▲1
=304KaliszGreater Poland, Poland 77 US AQI4.6 times the WHO guideline▼31
=307KolhāpurMaharashtra, India 76 US AQI4.5 times the WHO guideline▼1
=307BārmerRajasthan, India 76 US AQI4.5 times the WHO guideline▼4
=307RadomskoŁódź Voivodeship, Poland 76 US AQI4.5 times the WHO guideline▼9
=310BharatpurRajasthan, India 76 US AQI4.5 times the WHO guideline▲2
=310PhichitPhichit, Thailand 76 US AQI4.5 times the WHO guideline▼3
=310MukdahanMukdahan, Thailand 76 US AQI4.5 times the WHO guideline▼2
=313ShivamoggaKarnataka, India 76 US AQI4.5 times the WHO guideline▼20
=313AricaArica y Parinacota Region, Chile 76 US AQI4.5 times the WHO guideline▼3
=313Saphan SungBangkok, Thailand 76 US AQI4.5 times the WHO guideline▼2
=316BhilaiChhattisgarh, India 76 US AQI4.5 times the WHO guideline▼2
=316Maha SarakhamMaha Sarakham, Thailand 76 US AQI4.5 times the WHO guideline▼1
=316Viña del MarValparaiso, Chile 76 US AQI4.5 times the WHO guideline
319Naucalpan de JuárezMéxico, Mexico 75 US AQI4.4 times the WHO guideline▼1
320Bielsko-BialaSilesia, Poland 75 US AQI4.4 times the WHO guideline
=321Phra PradaengSamut Prakan, Thailand 75 US AQI4.4 times the WHO guideline▼1
=321Lop BuriLopburi, Thailand 75 US AQI4.4 times the WHO guideline
=321Ban Talat BuengChon Buri, Thailand 75 US AQI4.4 times the WHO guideline▼8
=321Lak SiBangkok, Thailand 75 US AQI4.4 times the WHO guideline▲1
=325SukhothaiSukhothai, Thailand 75 US AQI4.4 times the WHO guideline▼2
=325ZagrebZagreb, Croatia 75 US AQI4.4 times the WHO guideline▲22
=327BareillyUttar Pradesh, India 75 US AQI4.4 times the WHO guideline▼3
=327LotaBiobio, Chile 75 US AQI4.4 times the WHO guideline▲4
=329Roi EtRoi Et, Thailand 74 US AQI4.3 times the WHO guideline▼4
=329Ban Samae DamBangkok, Thailand 74 US AQI4.3 times the WHO guideline▼3
=329Amnat CharoenAmnat Charoen, Thailand 74 US AQI4.3 times the WHO guideline▼2
=329Ciudad NezahualcoyotlMéxico, Mexico 74 US AQI4.3 times the WHO guideline
=329San Francisco De BorjaLima region, Peru 74 US AQI4.3 times the WHO guideline▲1
=334Bang Bo DistrictSamut Prakan, Thailand 74 US AQI4.3 times the WHO guideline▼2
=334PubalGyeonggi-do, South Korea 74 US AQI4.3 times the WHO guideline▼1
=336La SerenaCoquimbo Region, Chile 74 US AQI4.3 times the WHO guideline▼1
=336Bueng KumBangkok, Thailand 74 US AQI4.3 times the WHO guideline
=338Sighetu Marmaţieilast full day 10 OctMaramureş, Romania 74 US AQI4.3 times the WHO guideline▼21
=338DebrecenHajdú-Bihar, Hungary 74 US AQI4.3 times the WHO guideline▲30
=338Gostivarlast full day 10 OctGostivar, North Macedonia 74 US AQI4.3 times the WHO guideline▼1
=338Udon ThaniUdon Thani, Thailand 74 US AQI4.3 times the WHO guideline
342Ban ChangRayong, Thailand 74 US AQI4.2 times the WHO guideline▼3
=343PhetchabunPhetchabun, Thailand 73 US AQI4.2 times the WHO guideline▼2
=343KimjeJeollabuk-do, South Korea 73 US AQI4.2 times the WHO guideline▼1
=343CallaoCallao, Peru 73 US AQI4.2 times the WHO guideline
=346KłodzkoLower Silesia, Poland 73 US AQI4.2 times the WHO guideline▼37
=346AntofagastaAntofagasta, Chile 73 US AQI4.2 times the WHO guideline▼1
348Mueang NonthaburiNonthaburi, Thailand 73 US AQI4.2 times the WHO guideline▼2
349PueblaPuebla, Mexico 73 US AQI4.2 times the WHO guideline▼1
350Nakhon PathomNakhon Pathom, Thailand 72 US AQI4.1 times the WHO guideline
=351BitolaBitola, North Macedonia 72 US AQI4.1 times the WHO guideline▼11
=351SaraburiSaraburi, Thailand 72 US AQI4.1 times the WHO guideline
=353Târgu Jiulast full day 10 OctGorj County, Romania 72 US AQI4.1 times the WHO guideline▼9
=353ChaiyaphumChaiyaphum, Thailand 72 US AQI4.1 times the WHO guideline▼1
=353Bang KapiBangkok, Thailand 72 US AQI4.1 times the WHO guideline
=356BangkokBangkok, Thailand 72 US AQI4.1 times the WHO guideline▼1
=356AccraGreater Accra, Ghana 72 US AQI4.1 times the WHO guideline
=358MzuzuNorthern Region, Malawi 72 US AQI4.0 times the WHO guideline▼1
=358PuducherryPuducherry, India 72 US AQI4.0 times the WHO guideline
=358SingaporeSingapore 72 US AQI4.0 times the WHO guideline▲7
=358TijuanaBaja California, Mexico 72 US AQI4.0 times the WHO guideline▼24
=362ČaňaKošice Region, Slovakia 71 US AQI4.0 times the WHO guideline
=362Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand 71 US AQI4.0 times the WHO guideline▼3
=362GuadalajaraJalisco, Mexico 71 US AQI4.0 times the WHO guideline▼2
=362Sai MaiBangkok, Thailand 71 US AQI4.0 times the WHO guideline▼1
366SibsāgarAssam, India 71 US AQI4.0 times the WHO guideline▼4
=367BuanJeollabuk-do, South Korea 71 US AQI4.0 times the WHO guideline▼1
=367Jastrzębie ZdrójSilesia, Poland 71 US AQI4.0 times the WHO guideline▼18
=369YeojuGyeonggi-do, South Korea 71 US AQI3.9 times the WHO guideline▲3
=369TangjinChungcheongnam-do, South Korea 71 US AQI3.9 times the WHO guideline▼2
=369Gimpo-siGyeonggi-do, South Korea 71 US AQI3.9 times the WHO guideline▲4
372Nong Bua LamphuNong Bua Lamphu, Thailand 71 US AQI3.9 times the WHO guideline▼1
=373KumanovoKumanovo, North Macedonia 70 US AQI3.9 times the WHO guideline▼9
=373YesanChungcheongnam-do, South Korea 70 US AQI3.9 times the WHO guideline▲1
=373WłocławekKujawsko-Pomorskie, Poland 70 US AQI3.9 times the WHO guideline▼45
376Mexico CityMexico City, Mexico 70 US AQI3.9 times the WHO guideline▼1
=377Kalaburagilast full day 11 OctKarnataka, India 70 US AQI3.9 times the WHO guideline▼1
=377Nong ChokBangkok, Thailand 70 US AQI3.9 times the WHO guideline
=377AsanChungcheongnam-do, South Korea 70 US AQI3.9 times the WHO guideline▲1
=380TratTrat, Thailand 70 US AQI3.8 times the WHO guideline▲1
=380WanjuJeollabuk-do, South Korea 70 US AQI3.8 times the WHO guideline▲2
=380KoprivnicaKoprivnica-Križevci, Croatia 70 US AQI3.8 times the WHO guideline
=380JeongeupJeollabuk-do, South Korea 70 US AQI3.8 times the WHO guideline▼1
=384Suceavalast full day 10 OctSuceava, Romania 70 US AQI3.8 times the WHO guideline▼4
=384GwangmyeongGyeonggi-do, South Korea 70 US AQI3.8 times the WHO guideline▼1
=386IncheonIncheon, South Korea 69 US AQI3.8 times the WHO guideline▲3
=386Atotonilco de TulaHidalgo, Mexico 69 US AQI3.8 times the WHO guideline
=388YasothonYasothon, Thailand 69 US AQI3.8 times the WHO guideline▼1
=388RayongRayong, Thailand 69 US AQI3.8 times the WHO guideline▲3
=388Ban Khlong PrawetBangkok, Thailand 69 US AQI3.8 times the WHO guideline
=388HavířovMoravian-Silesian Region, Czechia 69 US AQI3.8 times the WHO guideline
=388ZgierzŁódź Voivodeship, Poland 69 US AQI3.8 times the WHO guideline▼32
=388Czechowice-DziedziceSilesia, Poland 69 US AQI3.8 times the WHO guideline▼34
394CoquimboCoquimbo Region, Chile 69 US AQI3.8 times the WHO guideline▼2
=395SurinSurin, Thailand 69 US AQI3.7 times the WHO guideline▼2
=395GunsanJeollabuk-do, South Korea 69 US AQI3.7 times the WHO guideline▼1
=395HongseongChungcheongnam-do, South Korea 69 US AQI3.7 times the WHO guideline
=395HwadoGyeonggi-do, South Korea 69 US AQI3.7 times the WHO guideline▲1
=395Wodzisław ŚląskiSilesia, Poland 69 US AQI3.7 times the WHO guideline
=395CieszynSilesia, Poland 69 US AQI3.7 times the WHO guideline

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).