All 2,894 cities by PM2.5, last 7 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.

Hide the 297 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.

=216Sau Mau PingKwun Tong District, Hong Kong 68 US AQI▲57
=216NonsanChungcheongnam-do, South Korea 68 US AQI▼38
=216San Pedro de la PazBiobio, Chile 68 US AQI▼40
=219AshaimanGreater Accra, Ghana 68 US AQI▼83
=219CoronelBiobio, Chile 68 US AQI▼8
=219Bueng KumBangkok, Thailand 68 US AQI▼13
222MunsanGyeonggi-do, South Korea 67 US AQI▲6
not rankedSi RachaChon Buri, Thailand 67 US AQI
not rankedArcoreLombardy, Italy 67 US AQI
=223SecundaMpumalanga, South Africa 67 US AQI▼37
=223ConcónValparaiso, Chile 67 US AQI▼10
=225BakuBaki, Azerbaijan 67 US AQI▼52
=225SaraburiSaraburi, Thailand 67 US AQI▲6
=225Mueang NonthaburiNonthaburi, Thailand 67 US AQI▲16
=225Sannazzaro de' BurgondiLombardy, Italy 67 US AQI▲46
not rankedShohamCentral District, Israel 67 US AQI
229PuchuncavíValparaiso, Chile 66 US AQI▼35
=230OtwockMazovia, Poland 66 US AQI▼65
=230TrangTrang, Thailand 66 US AQI▼53
=230PhatthalungPhatthalung, Thailand 66 US AQI▼39
=230VictoriaCentral and Western, Hong Kong 66 US AQI▲64
=230Trevigliolast full day 11 OctLombardy, Italy 66 US AQI
=230PljevljaPljevlja, Montenegro 66 US AQI▼84
not rankedTylerTexas, United States 66 US AQI
=236SidonSouth Governorate, Lebanon 66 US AQI▲9
=236Sakon NakhonSakon Nakhon, Thailand 66 US AQI▲88
=236MeccaCalifornia, United States 66 US AQI▼53
239Tsuen WanTsuen Wan, Hong Kong 66 US AQI▲27
=240ShakaskraalKwaZulu-Natal, South Africa 66 US AQI▼65
=240Nakhon PathomNakhon Pathom, Thailand 66 US AQI▼13
=240YongkangTaiwan, Taiwan 66 US AQI▲44
=243AmandelbultLimpopo, South Africa 66 US AQI▲4
=243Sha TinSha Tin, Hong Kong 66 US AQI▲93
=243Koch'angJeollabuk-do, South Korea 66 US AQI▲37
=243AnseongGyeonggi-do, South Korea 66 US AQI▲1
=243LotaBiobio, Chile 66 US AQI▼20
=248BharatpurBagmati Province, Nepal 65 US AQI
=248DaejeonDaejeon, South Korea 65 US AQI▲6
=248GumiGyeongsangbuk-do, South Korea 65 US AQI▼13
=248JeonjuJeollabuk-do, South Korea 65 US AQI▲26
=248Milanlast full day 11 OctLombardy, Italy 65 US AQI
=248TshiterekeLimpopo, South Africa 65 US AQI▲4
not rankedTsukubaIbaraki, Japan 65 US AQI
254XinyingTaiwan, Taiwan 65 US AQI▲77
255CorcoranCalifornia, United States 65 US AQI▼31
=256ChaiyaphumChaiyaphum, Thailand 65 US AQI▲74
=256SintansinDaejeon, South Korea 65 US AQI▼1
=256NajuJeollanam-do, South Korea 65 US AQI▲4
=256QuillotaValparaiso, Chile 65 US AQI▼34
=256CopiapóAtacama, Chile 65 US AQI▼44
=261Hua HinPrachuap Khiri Khan, Thailand 65 US AQI▲15
=261Amnat CharoenAmnat Charoen, Thailand 65 US AQI▲55
=261KaohsiungTakao, Taiwan 65 US AQI▼13
=261MasanGwangju, South Korea 65 US AQI▼11
=261KoesanNorth Chungcheong, South Korea 65 US AQI▲27
not rankedMaumelleArkansas, United States 65 US AQI
=266RayongRayong, Thailand 64 US AQI▼4
=266FengshanTakao, Taiwan 64 US AQI▲4
=266Uijeongbu-siGyeonggi-do, South Korea 64 US AQI▲29
=266ZagrebZagreb, Croatia 64 US AQI▼134
=266Viña del MarValparaiso, Chile 64 US AQI▼30
=266SinanJeollanam-do, South Korea 64 US AQI▲6
=272TaibaoTaiwan, Taiwan 64 US AQI▲79
=272Chiayi CityTaiwan, Taiwan 64 US AQI▲80
=272TocopillaAntofagasta, Chile 64 US AQI▼65
=272MexicaliBaja California, Mexico 64 US AQI▼71
=272MarikanaNorth West, South Africa 64 US AQI▼58
=277TaharaAichi, Japan 64 US AQI▲15
=277RengoO'Higgins Region, Chile 64 US AQI▼48
=277QuilpuéValparaiso, Chile 64 US AQI▼47
=277GuadalajaraJalisco, Mexico 64 US AQI▼20
=277MiamiOklahoma, United States 64 US AQI▼26
not rankedCarrolltonTexas, United States 64 US AQI
=282BelgradeCentral Serbia, Serbia 64 US AQI▼108
=282Taesal-liChungcheongnam-do, South Korea 64 US AQI▲30
=282BuyeoChungcheongnam-do, South Korea 64 US AQI▼14
=282Rio ClaroSão Paulo, Brazil 64 US AQI▼57
=282SoachaCundinamarca, Colombia 64 US AQI▼56
not rankedAshkelonSouthern District, Israel 64 US AQI
=287MiddelburgMpumalanga, South Africa 64 US AQI▼9
=287Udon ThaniUdon Thani, Thailand 64 US AQI▲59
=287HanamGyeonggi-do, South Korea 64 US AQI▲10
not rankedVinicaVinica, North Macedonia 64 US AQI
not rankedParanaque CityNational Capital Region, Philippines 64 US AQI
not rankedDiamniadioDakar, Senegal 64 US AQI
=290Ban Thai TanAng Thong, Thailand 63 US AQI▲18
=290EisenGyeongsangbuk-do, South Korea 63 US AQI▲20
=290WŏnjuGangwon-do, South Korea 63 US AQI▲21
=290Ciudad NezahualcoyotlMéxico, Mexico 63 US AQI▲167
not rankedFânzeresPorto, Portugal 63 US AQI
=294ZhongliaoTaiwan, Taiwan 63 US AQI▲134
=294LodiLombardy, Italy 63 US AQI
=294BirendranagarKarnali Pradesh, Nepal 63 US AQI
=294Sai MaiBangkok, Thailand 63 US AQI▲6
=298Chai NatChai Nat, Thailand 63 US AQI▲57
=298LuguTaiwan, Taiwan 63 US AQI▲60
=298Donghae CityGangwon-do, South Korea 63 US AQI▼5
=298Mexico CityMexico City, Mexico 63 US AQI▲52
=298TalaganteSantiago Metropolitan, Chile 63 US AQI▼37
303TaichungTaiwan, Taiwan 63 US AQI▲103

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 7 days to 14 Oct 2026, 06:00 UTC: each city's mean of its daily means, cities measured 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. Ranked on low-cost sensors, with no reference monitor in the city: #1 Kuala Lumpur, #3 Dhaka, #4 Faisalabad, #5 Kasur, #6 Gujranwala, #7 Lahore, #8 Peshawar, #9 Multan and #10 Jakarta. Some readings from Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); 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 readings: Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); 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).