516 cities by checked peak, last 7 days

Every city with enough measurements in this window, worst first.

CPCB in India: no readings since 12 Oct (488 monitors). EEA in Spain: no readings since 13 Oct (310 monitors). Their cities show older figures or are missing from this board, not clean.

Ranked by checked peak: each city's worst 6 hours in a row, read by at least 2 monitoring places 3 km or more apart (the second-highest place's average over those hours), so one faulty monitor or smoke over one corner of a city can't set it. 516 of these 2,895 cities are ranked: those measured at 2 or more such places on enough of the days.

=201ChuncheonGangwon-do, South Korea 71
=201TemucoAraucania, Chile 71
=203TullnLower Austria, Austria 70
=203León de los AldamaGuanajuato, Mexico 70
205LinzUpper Austria, Austria 70
=206YeongjuGyeongsangbuk-do, South Korea 70
=206Jeju CityJeju-do, South Korea 70
=206ViennaVienna, Austria 70
=206InglewoodCalifornia, United States 70
=210Yangp'yŏngGyeonggi-do, South Korea 69
=210BusanBusan, South Korea 69
=210HayashimaOkayama, Japan 69
=210GamagōriAichi, Japan 69
214Munichlast full day 11 OctBavaria, Germany 69
=215UlsanUlsan, South Korea 69
=215SaijōEhime, Japan 69
=215Attnang-PuchheimUpper Austria, Austria 69
=215QuinteroValparaiso, Chile 69
=219YokkaichiMie, Japan 69
=219Fort WorthTexas, United States 69
221GimcheonGyeongsangbuk-do, South Korea 69
222Kakogawachō-honmachiHyōgo, Japan 68
=223IchinomiyaAichi, Japan 68
=223PuchuncavíValparaiso, Chile 68
=225AmandelbultLimpopo, South Africa 68
=225QuillotaValparaiso, Chile 68
=225KuwanaMie, Japan 68
=228ŌitaOita, Japan 68
=228HamamatsuShizuoka, Japan 68
=228FukuokaFukuoka, Japan 68
=228Viña del MarValparaiso, Chile 68
232AmstettenLower Austria, Austria 67
=233HonmachiKumamoto, Japan 67
=233Kashihara-shiNara, Japan 67
=233SeogwipoJeju-do, South Korea 67
=236ShimonosekiYamaguchi, Japan 67
=236MadridMadrid, Spain 67
=236SaitamaSaitama, Japan 67
=236IgaMie, Japan 67
240OconomowocWisconsin, United States 67
241ChangsuJeollabuk-do, South Korea 66
=242ChinjuGyeongsangnam-do, South Korea 66
=242KotōKumamoto, Japan 66
=244SaseboNagasaki, Japan 66
=244KōnosuSaitama, Japan 66
=244FukuyamaHiroshima, Japan 66
=244AsahikawaHokkaido, Japan 66
=244ShikokuchūōEhime, Japan 66
249KimhaeGyeongsangnam-do, South Korea 66
250JacksonMississippi, United States 66
=251SuzukaMie, Japan 65
=251SōjaOkayama, Japan 65
=251GwangyangJeollanam-do, South Korea 65
=251Groß-EnzersdorfLower Austria, Austria 65
=251BratislavaBratislava Region, Slovakia 65
=256YangsanGyeongsangnam-do, South Korea 65
=256AccraGreater Accra, Ghana 65
258MenumaSaitama, Japan 65
=259KimitsuChiba, Japan 65
=259MiddletownOhio, United States 65
=261OsakaOsaka, Japan 64
=261MoriokaIwate, Japan 64
=261SevillaAndalusia, Spain 64
=261BakersfieldCalifornia, United States 64
=261CarsonCalifornia, United States 64
=266HiroshimaHiroshima, Japan 64
=266FujiShizuoka, Japan 64
=266ZapopanJalisco, Mexico 64
=269UjiKyoto, Japan 64
=269KureHiroshima, Japan 64
=269KishiwadaOsaka, Japan 64
=272BrisbaneQueensland, Australia 64
=272ChicagoIllinois, United States 64
=274KusatsuShiga, Japan 63
=274KumamotoKumamoto, Japan 63
=274UngsangGyeongsangnam-do, South Korea 63
=274MinneapolisMinnesota, United States 63
=278TsuMie, Japan 63
=278ŌtsuShiga, Japan 63
=278NumazuShizuoka, Japan 63
=281Ciudad JuárezChihuahua, Mexico 63
=281WheatonIllinois, United States 63
=281TorranceCalifornia, United States 63
=284KaunasKaunas, Lithuania 63
=284KoshigayaSaitama, Japan 63
=284KisarazuChiba, Japan 63
=284KawaguchiSaitama, Japan 63
=284Los AngelesCalifornia, United States 63
=284MercedCalifornia, United States 63
290La Línea de la ConcepciónAndalusia, Spain 63
=291TokyoTokyo, Japan 63
=291NaganoNagano, Japan 63
=291ProvidenceRhode Island, United States 63
=291ChikumaNagano, Japan 63
=295YokohamaKanagawa, Japan 62
=295KukichūōSaitama, Japan 62
=295AiharaKanagawa, Japan 62
=298LouisvilleKentucky, United States 62
=298CeresCalifornia, United States 62
300OkayamaOkayama, Japan 62

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 checked peak PM2.5 (µg/m³), last 7 days to 14 Oct 2026, 07:00 UTC: each city's worst 6 hours in a row, read by 2 or more monitoring places 3 km or more apart, cities with a checked peak on 5 or more of the 7 days. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=7d&by=peak. Ranked on low-cost sensors, with no reference monitor in the city: #1 Burunday, #2 Faisalabad, #3 Otegen Batyra, #4 Multan, #6 Peshawar, #7 Lahore, #8 Gujranwala, #9 Dhaka and #10 Kinshasa. Some readings from Aurassure; Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published.

Download top 10 by average (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 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Aurassure; Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).