Air quality · North America

Air quality in United States today

Right now the most polluted of the 25 United States cities we cover is Seattle at AQI 103 (Unhealthy for sensitive groups); the cleanest is San Antonio at 22.

US EPA AQI, modelled from the CAMS forecast. Refreshed 3 Nov, 07:52 UTC+0.

Cities in United States, worst air first

US AQI now in United States
#	City	AQI	Category	Population
1	Seattle Washington	103	Sensitive groups	0.8 m people
2	Los Angeles California	88	Moderate	3.8 m people
3	Portland Oregon	76	Moderate	0.7 m people
4	Phoenix Arizona	74	Moderate	1.7 m people
5	New York City New York	70	Moderate	8.8 m people
6	San Diego California	69	Moderate	1.4 m people
7	Philadelphia Pennsylvania	64	Moderate	1.6 m people
8	Boston Massachusetts	63	Moderate	0.7 m people
9	San Jose California	58	Moderate	1.0 m people
10	San Francisco California	56	Moderate	0.8 m people
11	Washington District of Columbia	56	Moderate	0.7 m people
12	Houston Texas	52	Moderate	2.3 m people
13	Nashville Tennessee	46	Good	0.7 m people
14	Charlotte North Carolina	43	Good	0.9 m people
15	Jacksonville Florida	38	Good	1.0 m people
16	Chicago Illinois	34	Good	2.7 m people
17	Dallas Texas	27	Good	1.3 m people
18	Fort Worth Texas	27	Good	1.0 m people
19	Columbus Ohio	27	Good	0.9 m people
20	El Paso Texas	27	Good	0.7 m people
21	Indianapolis Indiana	26	Good	0.9 m people
22	Austin Texas	23	Good	1.0 m people
23	Denver Colorado	23	Good	0.7 m people
24	Oklahoma City Oklahoma	23	Good	0.7 m people
25	San Antonio Texas	22	Good	1.5 m people

Good 0–50
Moderate 51–100
Unhealthy for sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301–500

Each city’s value is the CAMS model at the city’s coordinates, scored on the US EPA AQI. It is an estimate, not a station reading. How we calculate it.

Cities in United States, worst air first

More of North America