Cities With the Lowest US AQI Right Now

La Paz has the lowest PM2.5-based US Air Quality Index in our major-city sample right now, at about 10.

Updated hourly. Last updated Aug 10, 2026, 3:05:09 AM UTC.

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

Top Cities Ranked by US AQI

#	City	Country	Category	PM2.5	US AQI
🥇	La Paz	Bolivia	Good	1.8 µg/m³	10
🥈	Curitiba	Brazil	Good	1.9 µg/m³	11
🥉	Sydney	Australia	Good	2.4 µg/m³	13
=4	Yaounde	Cameroon	Good	2.5 µg/m³	14
=4	Lu’an	China	Good	2.5 µg/m³	14
=5	Brisbane	Australia	Good	2.8 µg/m³	16
=5	Niamey	Niger	Good	2.9 µg/m³	16
6	Pimpri	India	Good	3.2 µg/m³	18
7	Nanchang	China	Good	3.8 µg/m³	21
=8	Hefei	China	Good	3.9 µg/m³	22
=8	Melbourne	Australia	Good	4.0 µg/m³	22
=8	Montevideo	Uruguay	Good	4.0 µg/m³	22
=9	Bangkok	Thailand	Good	4.2 µg/m³	23
=9	Durban	South Africa	Good	4.2 µg/m³	23
=9	Ciudad Juárez	Mexico	Good	4.2 µg/m³	23
=10	Kumasi	Ghana	Good	4.5 µg/m³	25
=10	Bamako	Mali	Good	4.5 µg/m³	25
=10	San Antonio	United States	Good	4.5 µg/m³	25
=11	Wuhu	China	Good	4.6 µg/m³	26
=11	Yangzhou	China	Good	4.7 µg/m³	26
=11	Córdoba	Argentina	Good	4.7 µg/m³	26
=11	Antananarivo	Madagascar	Good	4.6 µg/m³	26
=12	Lianyungang	China	Good	4.8 µg/m³	27
=12	Huainan	China	Good	4.8 µg/m³	27
=12	Tirunelveli	India	Good	4.8 µg/m³	27
=12	Nizhniy Novgorod	Russia	Good	4.9 µg/m³	27
=12	Kazan	Russia	Good	4.9 µg/m³	27
=13	London	United Kingdom	Good	5.1 µg/m³	28
=13	Bengaluru	India	Good	5.1 µg/m³	28
=13	Chattogram	Bangladesh	Good	5.1 µg/m³	28
=13	Pune	India	Good	5.0 µg/m³	28
=13	Adelaide	Australia	Good	5.1 µg/m³	28
=13	Nashik	India	Good	5.1 µg/m³	28
=14	Havana	Cuba	Good	5.2 µg/m³	29
=14	Bucharest	Romania	Good	5.3 µg/m³	29
=14	Recife	Brazil	Good	5.3 µg/m³	29
=14	Yancheng	China	Good	5.3 µg/m³	29
=14	Daqing	China	Good	5.3 µg/m³	29
=15	Huai'an	China	Good	5.8 µg/m³	32
=15	Jinhua	China	Good	5.8 µg/m³	32
=15	Suqian	China	Good	5.8 µg/m³	32
=15	Yixing	China	Good	5.8 µg/m³	32
=16	Kyiv	Ukraine	Good	5.9 µg/m³	33
=16	Buenos Aires	Argentina	Good	6.0 µg/m³	33
=16	Sapporo	Japan	Good	6.0 µg/m³	33
=16	Putian	China	Good	5.9 µg/m³	33
=16	Kharkiv	Ukraine	Good	5.9 µg/m³	33
=16	Saitama	Japan	Good	6.0 µg/m³	33
=17	Casablanca	Morocco	Good	6.2 µg/m³	34
=17	Dallas	United States	Good	6.1 µg/m³	34
=17	Mandalay	Myanmar	Good	6.2 µg/m³	34
=18	Ouagadougou	Burkina Faso	Good	6.3 µg/m³	35
=18	Perth	Australia	Good	6.3 µg/m³	35
=18	Camayenne	Guinea	Good	6.3 µg/m³	35
=18	Fuyang	China	Good	6.3 µg/m³	35
=18	Conakry	Guinea	Good	6.3 µg/m³	35
=19	Nantong	China	Good	6.4 µg/m³	36
=19	Phnom Penh	Cambodia	Good	6.4 µg/m³	36
=19	Minsk	Belarus	Good	6.4 µg/m³	36
=19	Manila	Philippines	Good	6.5 µg/m³	36
=19	Budapest	Hungary	Good	6.5 µg/m³	36
=19	Caloocan City	Philippines	Good	6.5 µg/m³	36
=19	Belém	Brazil	Good	6.4 µg/m³	36
=19	Cixi	China	Good	6.5 µg/m³	36
=19	Zhangjiagang	China	Good	6.4 µg/m³	36
=20	Yiwu	China	Good	6.6 µg/m³	37
=20	Mombasa	Kenya	Good	6.7 µg/m³	37
=21	Nanjing	China	Good	6.9 µg/m³	38
=21	Quito	Ecuador	Good	6.8 µg/m³	38
=21	Montréal	Canada	Good	6.9 µg/m³	38
=21	Ulaanbaatar	Mongolia	Good	6.8 µg/m³	38
=22	Dar es Salaam	Tanzania	Good	7.1 µg/m³	39
=22	Pyongyang	North Korea	Good	7.1 µg/m³	39
=22	Jiangyin	China	Good	7.1 µg/m³	39
=23	Quezon City	Philippines	Good	7.2 µg/m³	40
=23	Vienna	Austria	Good	7.2 µg/m³	40
=23	Daejeon	South Korea	Good	7.2 µg/m³	40
24	Maracay	Venezuela	Good	7.3 µg/m³	41
25	Prague	Czechia	Good	7.7 µg/m³	43
=26	Ningbo	China	Good	7.9 µg/m³	44
=26	Mogadishu	Somalia	Good	7.9 µg/m³	44
27	Kyoto	Japan	Good	8.1 µg/m³	45
=28	Baku	Azerbaijan	Good	8.3 µg/m³	46
=28	Yantai	China	Good	8.3 µg/m³	46
=28	Diyarbakır	Türkiye	Good	8.2 µg/m³	46
=28	Warsaw	Poland	Good	8.3 µg/m³	46
=28	Bhopāl	India	Good	8.3 µg/m³	46
=29	São Paulo	Brazil	Good	8.5 µg/m³	47
=29	Shaoxing	China	Good	8.4 µg/m³	47
=29	Coimbatore	India	Good	8.5 µg/m³	47
=29	Yekaterinburg	Russia	Good	8.4 µg/m³	47
=30	Yangon	Myanmar	Good	8.6 µg/m³	48
=30	Chicago	United States	Good	8.6 µg/m³	48
=31	Harbin	China	Good	8.9 µg/m³	49
=31	Manaus	Brazil	Good	8.8 µg/m³	49
=31	Phoenix	United States	Good	8.8 µg/m³	49
32	Qujing	China	Good	9.0 µg/m³	50
=33	Saint Petersburg	Russia	Moderate	9.1 µg/m³	51
=33	Madrid	Spain	Moderate	9.3 µg/m³	51
=33	Caracas	Venezuela	Moderate	9.3 µg/m³	51

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, La Paz has the lowest current PM2.5-based US AQI at about 10 (as of August 10, 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

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