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
	Rochester Near Rd, New York, USA on 2019-04-20 19:00:00 graph 0	195
	Wauchope, Saskatchewan, Canada on 2019-04-20 19:00:00 graph 1	191
	Augusta Ave, Spokane, Washington, USA on 2019-04-20 20:00:00 graph 2	158
	Shoshone Bannock Tribes, Idaho, USA on 2019-04-20 20:00:00 graph 3	153
	Colfax-City Hall, Placer, California, California on 2019-04-20 19:00:00 graph 4	97
	Yellowknife, NorthWestTerritories, Canada on 2019-04-20 17:00:00 graph 5	90
	Mayo Clinic, Duval, Florida, USA on 2019-04-20 21:00:00 graph 6	90
	Sequoia National Park-Ash Mountain, Tulare, California, California on 2019-04-20 11:00:00 graph 7	87
	Parkway East, Allegheny, Pennsylvania, USA on 2019-04-20 17:00:00 graph 8	82
	Telkwa, British Comlumbia on 2019-04-20 20:00:00 graph 9	80

Best
	East Syracuse, New York, USA on 2019-04-20 18:00:00 graph 0	1
	Tonawanda II, New York, USA on 2019-04-20 17:00:00 graph 1	1
	Mt. Ninham, New York, USA on 2019-04-20 15:00:00 graph 2	1
	Utica, New York, USA on 2019-04-20 18:00:00 graph 3	1
	New York Botanical Garden, USA on 2019-04-20 19:00:00 graph 4	1
	The City College of New York, USA on 2019-04-20 19:00:00 graph 5	1
	Whiteface Base, New York, USA on 2019-04-20 18:00:00 graph 6	1
	Stillwater, New York, USA on 2019-04-20 19:00:00 graph 7	1
	Heritage Middle School, San Antonio, Texas, Texas on 2019-04-20 20:00:00 graph 8	1
	Calaveras Lake, San Antonio, Texas, Texas on 2019-04-20 20:00:00 graph 9	1

Top 10 Best and Worst Air Quality in North America