All 2,645 cities by PM2.5, last 24 hours

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 are missing from this board, not clean.

Hide the 1,153 cities with only 1–2 sensors

These cities have only one or two low-cost sensors, and one cheap unit can read well off, so they take no rank. They sit at their place by value, marked –, and every ranked city keeps its number.

not rankedKomáromKomárom-Esztergom, Hungary 72 US AQI1.4 times the WHO guideline
169ThabazimbiLimpopo, South Africa 72 US AQI1.3 times the WHO guideline▲124
not rankedStalowa WolaSubcarpathia, Poland 72 US AQI1.3 times the WHO guideline
not rankedHoniaraHoniara, Solomon Islands 72 US AQI1.3 times the WHO guideline
not rankedKrálovo PoleSouth Moravian, Czechia 72 US AQI1.3 times the WHO guideline
=170OtwockMazovia, Poland 71 US AQI1.3 times the WHO guideline▲475
=170UttaraditUttaradit, Thailand 71 US AQI1.3 times the WHO guideline▲137
=170CheorwonGangwon-do, South Korea 71 US AQI1.3 times the WHO guideline▼48
not rankedViadanaLombardy, Italy 71 US AQI1.3 times the WHO guideline
173AmandelbultLimpopo, South Africa 71 US AQI1.3 times the WHO guideline▲39
not rankedBoltonOntario, Canada 71 US AQI1.3 times the WHO guideline
=174TzaneenLimpopo, South Africa 71 US AQI1.3 times the WHO guideline▼43
=174SaraburiSaraburi, Thailand 71 US AQI1.3 times the WHO guideline▲17
not rankedTexcoco de MoraMéxico, Mexico 71 US AQI1.3 times the WHO guideline
=176Suphan BuriSuphan Buri, Thailand 71 US AQI1.3 times the WHO guideline▲20
=176ChangchunJilin, China 71 US AQI1.3 times the WHO guideline▼140
not rankedHrazdanKotayk, Armenia 71 US AQI1.3 times the WHO guideline
not rankedSpring HillTennessee, United States 71 US AQI1.3 times the WHO guideline
=178Ban Thai TanAng Thong, Thailand 71 US AQI1.3 times the WHO guideline▲11
=178Atotonilco de TulaHidalgo, Mexico 71 US AQI1.3 times the WHO guideline▼2
not rankedJūrmalaJūrmala, Latvia 71 US AQI1.3 times the WHO guideline
=180WanjuJeollabuk-do, South Korea 70 US AQI1.3 times the WHO guideline▼52
=180GimcheonGyeongsangbuk-do, South Korea 70 US AQI1.3 times the WHO guideline▲224
not rankedZąbkowice ŚląskieLower Silesia, Poland 70 US AQI1.3 times the WHO guideline
=182Gyeongsan-siGyeongsangbuk-do, South Korea 70 US AQI1.3 times the WHO guideline▲464
=182Hongch’ŏnGangwon-do, South Korea 70 US AQI1.3 times the WHO guideline▲369
=182Santiaguito TlalcilalcalliMéxico, Mexico 70 US AQI1.3 times the WHO guideline▼85
not rankedGliwiceSilesia, Poland no daily values yet70 US AQI1.3 times the WHO guideline
not rankedEl ShoroukCairo, Egypt 70 US AQI1.3 times the WHO guideline
=185BuanJeollabuk-do, South Korea 70 US AQI1.3 times the WHO guideline▲14
=185HwawŏnDaegu, South Korea 70 US AQI1.3 times the WHO guideline▲279
=185FunzaCundinamarca, Colombia 70 US AQI1.3 times the WHO guideline
=185Sai MaiBangkok, Thailand 70 US AQI1.3 times the WHO guideline▲107
not rankedPančevoVojvodina, Serbia 70 US AQI1.3 times the WHO guideline
not rankedPoděbradyCentral Bohemia, Czechia 70 US AQI1.3 times the WHO guideline
=189ChaozhouTaiwan, Taiwan 70 US AQI1.3 times the WHO guideline▲70
=189EisenGyeongsangbuk-do, South Korea 70 US AQI1.3 times the WHO guideline▲71
=189ChangsuJeollabuk-do, South Korea 70 US AQI1.3 times the WHO guideline▲605
=192Uthai ThaniUthai Thani, Thailand 69 US AQI1.3 times the WHO guideline▲65
=192Jastrzębie ZdrójSilesia, Poland 69 US AQI1.3 times the WHO guideline▲97
194NangenJeollabuk-do, South Korea 69 US AQI1.3 times the WHO guideline▲599
not rankedNördlingenBavaria, Germany 69 US AQI1.3 times the WHO guideline
=195YeojuGyeonggi-do, South Korea 69 US AQI1.3 times the WHO guideline▼110
=195YecheonGyeongsangbuk-do, South Korea 69 US AQI1.3 times the WHO guideline▲336
=195SangjuGyeongsangbuk-do, South Korea 69 US AQI1.3 times the WHO guideline▲229
=195PyeongtaekGyeonggi-do, South Korea 69 US AQI1.3 times the WHO guideline▼93
=195KinzanChungcheongnam-do, South Korea 69 US AQI1.3 times the WHO guideline▲155
=195AguascalientesAguascalientes, Mexico 69 US AQI1.3 times the WHO guideline▲27
=201WaegwanGyeongsangbuk-do, South Korea 69 US AQI1.2 times the WHO guideline▲143
=201DaejeonDaejeon, South Korea 69 US AQI1.2 times the WHO guideline▲219
=203PhayaoPhayao, Thailand 69 US AQI1.2 times the WHO guideline▲117
=203Quezon CityNational Capital Region, Philippines 69 US AQI1.2 times the WHO guideline▼111
=203DaeguDaegu, South Korea 69 US AQI1.2 times the WHO guideline▲421
not rankedSpišská Nová VesKošice Region, Slovakia 69 US AQI1.2 times the WHO guideline
not rankedInnisfilOntario, Canada 69 US AQI1.2 times the WHO guideline
=206DurbanKwaZulu-Natal, South Africa 69 US AQI1.2 times the WHO guideline▼165
=206YesanChungcheongnam-do, South Korea 69 US AQI1.2 times the WHO guideline▼82
=206SejongSejong-si, South Korea 69 US AQI1.2 times the WHO guideline▲108
not rankedOak RidgeTennessee, United States 69 US AQI1.2 times the WHO guideline
not rankedAlbertvilleAlabama, United States 69 US AQI1.2 times the WHO guideline
not rankedWaterlooOntario, Canada 69 US AQI1.2 times the WHO guideline
209PhraePhrae, Thailand 68 US AQI1.2 times the WHO guideline▲192
not rankedMadisonAlabama, United States 68 US AQI1.2 times the WHO guideline
=210YeongdongNorth Chungcheong, South Korea 68 US AQI1.2 times the WHO guideline▲329
=210Jinan-gunJeollabuk-do, South Korea 68 US AQI1.2 times the WHO guideline
=210YŏnmuChungcheongnam-do, South Korea 68 US AQI1.2 times the WHO guideline▲61
not rankedKangarPerlis, Malaysia 68 US AQI1.2 times the WHO guideline
=213RayongRayong, Thailand 68 US AQI1.2 times the WHO guideline▲61
=213ChaiyaphumChaiyaphum, Thailand 68 US AQI1.2 times the WHO guideline▼106
=213JungpyongNorth Chungcheong, South Korea 68 US AQI1.2 times the WHO guideline▲48
not rankedSaint CharlesMaryland, United States 68 US AQI1.2 times the WHO guideline
=216SecundaMpumalanga, South Africa 68 US AQI1.2 times the WHO guideline▼96
=216YeongjuGyeongsangbuk-do, South Korea 68 US AQI1.2 times the WHO guideline▲491
=216ChungjuNorth Chungcheong, South Korea 68 US AQI1.2 times the WHO guideline▲217
=216GwangmyeongGyeonggi-do, South Korea 68 US AQI1.2 times the WHO guideline▼136
=216Wodzisław ŚląskiSilesia, Poland 68 US AQI1.2 times the WHO guideline▲469
=216JaworznoSilesia, Poland 68 US AQI1.2 times the WHO guideline
=216BirminghamAlabama, United States 68 US AQI1.2 times the WHO guideline▲127
not rankedNetanyaCentral District, Israel 68 US AQI1.2 times the WHO guideline
=223Novi PazarCentral Serbia, Serbia 68 US AQI1.2 times the WHO guideline▲134
=223Bang NaBangkok, Thailand 68 US AQI1.2 times the WHO guideline▲118
=223BeolgyoJeollanam-do, South Korea 68 US AQI1.2 times the WHO guideline▲202
=223NonsanChungcheongnam-do, South Korea 68 US AQI1.2 times the WHO guideline▲180
=223MungyeongGyeongsangbuk-do, South Korea 68 US AQI1.2 times the WHO guideline▲403
=223JeonjuJeollabuk-do, South Korea 68 US AQI1.2 times the WHO guideline▲9
=229Sing BuriSing Buri, Thailand 67 US AQI1.2 times the WHO guideline▼26
=229ImsilJeollabuk-do, South Korea 67 US AQI1.2 times the WHO guideline
=229MaconGeorgia, United States 67 US AQI1.2 times the WHO guideline▲299
not rankedAjaxOntario, Canada 67 US AQI1.2 times the WHO guideline
not rankedCobourgOntario, Canada 67 US AQI1.2 times the WHO guideline
=232TuxtlaChiapas, Mexico 67 US AQI1.2 times the WHO guideline▼184
=232Hacienda Santa FeJalisco, Mexico 67 US AQI1.2 times the WHO guideline▼91
=234Târgu MureşMureș County, Romania 67 US AQI1.2 times the WHO guideline▲344
=234ObrenovacCentral Serbia, Serbia 67 US AQI1.2 times the WHO guideline▲61
=234Nong ChokBangkok, Thailand 67 US AQI1.2 times the WHO guideline▲94
not rankedArcoreLombardy, Italy 67 US AQI1.2 times the WHO guideline
=237LamphunLamphun, Thailand 67 US AQI1.2 times the WHO guideline▲141
=237KłodzkoLower Silesia, Poland 67 US AQI1.2 times the WHO guideline▼16
=237KaliszGreater Poland, Poland 67 US AQI1.2 times the WHO guideline▲494
=237BogotáBogota D.C., Colombia 67 US AQI1.2 times the WHO guideline▲1123

What stands behind each figure: Checked at 2+ sites One reference monitor Low-cost sensors 1–2 sensors, not ranked 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 24 hours to 14 Oct 2026, 05:00 UTC: each city's mean of its hourly values, cities measured in 18 or more of the 24 hours. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings. Ranked on low-cost sensors, with no reference monitor in the city: #1 Gaur, Madhesh, #2 Kuala Lumpur, #4 Multan, #5 Faisalabad, #6 Gujranwala, #7 Lilongwe, #8 Lahore, #9 Dhaka and #10 Bahawalpur. Some values from Sensor.Community, ODbL. Some readings from Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; 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 05:07 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; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).