North American Air Pollution Statistics

About the Air Quality Levels

AQI	Air Pollution Level	Health Implications	Cautionary Statement (for PM2.5)
0 - 50	Good	Air quality is considered satisfactory, and air pollution poses little or no risk	None
51 -100	Moderate	Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.	Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150	Unhealthy for Sensitive Groups	Members of sensitive groups may experience health effects. The general public is not likely to be affected.	Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200	Unhealthy	Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects	Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300	Very Unhealthy	Health warnings of emergency conditions. The entire population is more likely to be affected.	Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+	Hazardous	Health alert: everyone may experience more serious health effects	Everyone should avoid all outdoor exertion

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check www.myhealthbeijing.com blog.

Worst
	Division Street, New York, USA on 2019-02-17 07:00:00 graph 0	500
	Public School 19, New York, USA on 2019-02-17 07:00:00 graph 1	500
	Maspeth, New York, USA on 2019-02-17 07:00:00 graph 2	500
	Intermediate School 143, New York, USA on 2019-02-17 07:00:00 graph 3	500
	I S 52 Junior High School, New York, USA on 2019-02-17 06:00:00 graph 4	205
	Kittanning, Pennsylvania, USA on 2019-02-17 07:00:00 graph 5	142
	Socorro Hueco, El Paso, Texas, Texas on 2019-02-17 06:00:00 graph 6	138
	Hobbs Jefferson, New Mexico, USA on 2019-02-17 07:00:00 graph 7	127
	CDF - Arroyo Grande, San Luis Obispo, California, California on 2019-02-17 08:00:00 graph 8	110
	Credit Union, South Dakota, USA on 2019-02-17 08:00:00 graph 9	99

Best
	Seeley Elementary School, Montana, USA on 2019-02-17 08:00:00 graph 0	2
	Edmonton East, Alberta, Canada on 2019-02-17 06:00:00 graph 1	2
	Tonawanda II, New York, USA on 2019-02-17 07:00:00 graph 2	2
	Keeler-Cerro Gordo Road, Inyo, California, California on 2019-02-17 07:00:00 graph 3	2
	Sacramento - 1309 T Street, Sacramento, California, California on 2019-02-17 07:00:00 graph 4	2
	PM2.5, Grand Jct. Powell, Colorado, USA on 2019-02-17 07:00:00 graph 5	2
	Joliet, Illinois, USA on 2019-02-17 06:00:00 graph 6	3
	Buffalo, New York, USA on 2019-02-17 07:00:00 graph 7	3
	Long Beach-Route 710 Near Road, Los Angeles, California, California on 2019-02-17 07:00:00 graph 8	3
	Boise Fire Station #5, Idaho, USA on 2019-02-17 09:00:00 graph 9	4

Top 10 Best and Worst Air Quality in North America