Cities With the Lowest US AQI Right Now

Novosibirsk has the lowest PM2.5-based US Air Quality Index in our major-city sample right now, at about 1.

Updated hourly. Last updated Oct 21, 2026, 5:05:09 PM UTC.

Cities with at least 200,000 residents; 100 cities shown.

Top Cities Ranked by US AQI

#	City	Country	Category	PM2.5	US AQI
🥇	Novosibirsk	Russia	Good	0.2 µg/m³	1
🥈	León de los Aldama	Mexico	Good	1.0 µg/m³	6
=3	La Paz	Bolivia	Good	1.3 µg/m³	7
=3	Santiago de Querétaro	Mexico	Good	1.2 µg/m³	7
4	Puebla	Mexico	Good	1.5 µg/m³	8
5	Sapporo	Japan	Good	1.6 µg/m³	9
=6	Zapopan	Mexico	Good	2.3 µg/m³	13
=6	Guadalajara	Mexico	Good	2.3 µg/m³	13
7	Yekaterinburg	Russia	Good	2.5 µg/m³	14
8	Goiânia	Brazil	Good	3.0 µg/m³	17
=9	Brasilia	Brazil	Good	3.2 µg/m³	18
=9	Guatemala City	Guatemala	Good	3.3 µg/m³	18
=9	Cali	Colombia	Good	3.2 µg/m³	18
=9	Iztapalapa	Mexico	Good	3.2 µg/m³	18
10	Queens	United States	Good	3.6 µg/m³	20
11	Munich	Germany	Good	3.7 µg/m³	21
12	Adelaide	Australia	Good	4.0 µg/m³	22
13	London	United Kingdom	Good	4.2 µg/m³	23
=14	Casablanca	Morocco	Good	4.4 µg/m³	24
=14	Valencia	Venezuela	Good	4.4 µg/m³	24
=15	Mexico City	Mexico	Good	4.5 µg/m³	25
=15	Abidjan	Côte d'Ivoire	Good	4.5 µg/m³	25
=15	Ecatepec de Morelos	Mexico	Good	4.5 µg/m³	25
=15	Abobo	Côte d'Ivoire	Good	4.5 µg/m³	25
=16	Sydney	Australia	Good	4.7 µg/m³	26
=16	Brisbane	Australia	Good	4.7 µg/m³	26
=16	Medellín	Colombia	Good	4.6 µg/m³	26
=16	Barquisimeto	Venezuela	Good	4.6 µg/m³	26
=17	Bogota	Colombia	Good	4.8 µg/m³	27
=17	Paris	France	Good	4.8 µg/m³	27
=17	Santa Cruz de la Sierra	Bolivia	Good	4.9 µg/m³	27
=17	Philadelphia	United States	Good	4.8 µg/m³	27
=18	New York City	United States	Good	5.0 µg/m³	28
=18	Brooklyn	United States	Good	5.0 µg/m³	28
=18	Belo Horizonte	Brazil	Good	5.1 µg/m³	28
=18	Montréal	Canada	Good	5.1 µg/m³	28
=18	Manhattan	United States	Good	5.0 µg/m³	28
=18	The Bronx	United States	Good	5.0 µg/m³	28
19	Budta	Philippines	Good	5.2 µg/m³	29
20	Madrid	Spain	Good	5.5 µg/m³	31
=21	Ürümqi	China	Good	5.7 µg/m³	32
=21	Ürümqi	China	Good	5.7 µg/m³	32
=21	Qujing	China	Good	5.7 µg/m³	32
=22	Chennai	India	Good	6.0 µg/m³	33
=22	Rome	Italy	Good	5.9 µg/m³	33
=22	Camayenne	Guinea	Good	5.9 µg/m³	33
=22	Maracay	Venezuela	Good	5.9 µg/m³	33
=22	Phoenix	United States	Good	5.9 µg/m³	33
=22	Conakry	Guinea	Good	5.9 µg/m³	33
23	Toronto	Canada	Good	6.1 µg/m³	34
=24	Algiers	Algeria	Good	6.4 µg/m³	36
=24	Barcelona	Spain	Good	6.4 µg/m³	36
=25	Daegu	South Korea	Good	6.8 µg/m³	38
=25	Daqing	China	Good	6.9 µg/m³	38
=26	Caracas	Venezuela	Good	7.1 µg/m³	39
=26	Baku	Azerbaijan	Good	7.0 µg/m³	39
=26	San Antonio	United States	Good	7.0 µg/m³	39
27	Ciudad Juárez	Mexico	Good	7.2 µg/m³	40
=28	Quanzhou	China	Good	7.3 µg/m³	41
=28	Jinjiang	China	Good	7.3 µg/m³	41
=28	Montevideo	Uruguay	Good	7.4 µg/m³	41
=29	Xiamen	China	Good	7.6 µg/m³	42
=29	Buenos Aires	Argentina	Good	7.6 µg/m³	42
=30	Fortaleza	Brazil	Good	7.7 µg/m³	43
=30	Perth	Australia	Good	7.7 µg/m³	43
=30	Phnom Penh	Cambodia	Good	7.8 µg/m³	43
=31	Huizhou	China	Good	7.9 µg/m³	44
=31	Accra	Ghana	Good	7.9 µg/m³	44
=31	Ordos	China	Good	8.0 µg/m³	44
=31	Córdoba	Argentina	Good	8.0 µg/m³	44
32	Busan	South Korea	Good	8.1 µg/m³	45
=33	Maracaibo	Venezuela	Good	8.3 µg/m³	46
=33	Putian	China	Good	8.3 µg/m³	46
=34	Guayaquil	Ecuador	Good	8.4 µg/m³	47
=34	Salvador	Brazil	Good	8.5 µg/m³	47
=34	Ulaanbaatar	Mongolia	Good	8.4 µg/m³	47
=35	Nairobi	Kenya	Good	8.6 µg/m³	48
=35	Mogadishu	Somalia	Good	8.7 µg/m³	48
=35	Qingyuan	China	Good	8.6 µg/m³	48
36	Kharkiv	Ukraine	Good	8.8 µg/m³	49
=37	Curitiba	Brazil	Moderate	9.3 µg/m³	51
=37	Quito	Ecuador	Moderate	9.1 µg/m³	51
=37	Gwangju	South Korea	Moderate	9.1 µg/m³	51
=37	Shubrā al Khaymah	Egypt	Moderate	9.2 µg/m³	51
=38	Alexandria	Egypt	Moderate	9.5 µg/m³	52
=38	Shantou	China	Moderate	9.9 µg/m³	52
=38	Dallas	United States	Moderate	9.7 µg/m³	52
=38	Kananga	Democratic Republic of Congo	Moderate	9.4 µg/m³	52
=39	Santiago	Chile	Moderate	10.1 µg/m³	53
=39	Mbuji-Mayi	Democratic Republic of Congo	Moderate	10.2 µg/m³	53
=39	Diyarbakır	Türkiye	Moderate	10.2 µg/m³	53
=39	Belém	Brazil	Moderate	10.4 µg/m³	53
=39	Tirunelveli	India	Moderate	10.0 µg/m³	53
=39	Antalya	Türkiye	Moderate	10.0 µg/m³	53
=39	Kazan	Russia	Moderate	10.4 µg/m³	53
=39	Mombasa	Kenya	Moderate	10.0 µg/m³	53
=40	Dongguan	China	Moderate	10.7 µg/m³	54
=40	Santo Domingo	Dominican Republic	Moderate	10.7 µg/m³	54
=40	Taipei	Taiwan	Moderate	10.6 µg/m³	54
=40	Havana	Cuba	Moderate	10.9 µg/m³	54

Methodology: Current pollutant concentrations are sampled from WeatherAPI for up to 400 large cities; US AQI values are calculated from PM2.5 using EPA breakpoints.

Why Is the AQI So Low in These Cities?

Lower AQI scores indicate lower measured PM2.5 pollution and generally lower health risk. A low PM2.5-based score does not rule out a local problem with another pollutant, so the table also shows supporting particle data.

Frequently Asked Questions: Cities With the Lowest US AQI Right Now

Which city has the lowest AQI right now?

Among the major cities we track, Novosibirsk has the lowest current PM2.5-based US AQI at about 1 (as of October 21, 2026).

Does a low AQI mean every pollutant is low?

Not necessarily. This score is calculated from PM2.5; ozone, nitrogen dioxide or coarse particles can still be elevated.

Cities With the Lowest US AQI Right Now

Top Cities Ranked by US AQI

Why Is the AQI So Low in These Cities?

Frequently Asked Questions: Cities With the Lowest US AQI Right Now

Related Air Quality Rankings

Browse Other Ranking Categories