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
	Valemount Firehall, British Comlumbia on 2018-10-22 15:00:00 graph 0	208
	Langley Central, British Comlumbia on 2018-10-22 16:00:00 graph 1	166
	Houston Firehall, British Comlumbia on 2018-10-22 15:00:00 graph 2	152
	L Street, Tacoma, Washington, USA on 2018-10-22 15:00:00 graph 3	144
	Duwamish, Seattle, Washington, USA on 2018-10-22 15:00:00 graph 4	136
	S 36th St, Tacoma, Washington, USA on 2018-10-22 14:00:00 graph 5	132
	Salmon, Idaho, USA on 2018-10-22 17:00:00 graph 6	129
	FNSB RAMS, Alaska, USA on 2018-10-22 15:00:00 graph 7	123
	7th Ave, Marysville, Washington, USA on 2018-10-22 15:00:00 graph 8	121
	Azure Way, Maple Falls , Washington, USA on 2018-10-22 15:00:00 graph 9	121

Best
	Beach Road VDOT, Richmond, USA on 2018-10-22 15:00:00 graph 0	1
	Stoughton, Saskatchewan, Canada on 2018-10-22 15:00:00 graph 1	1
	Marina 1, NorthWestTerritories, Canada on 2018-10-22 13:00:00 graph 2	1
	Millville, NewJersey, USA on 2018-10-22 15:00:00 graph 3	1
	New Albany, Indiana, USA on 2018-10-22 13:00:00 graph 4	2
	Clemmons Middle, North Carolina, USA on 2018-10-22 16:00:00 graph 5	2
	Charleston, West Virginia, USA on 2018-10-22 11:00:00 graph 6	2
	VA Tech Agricultural Research Center, Hampton Roads, USA on 2018-10-22 15:00:00 graph 7	2
	Fredericksburg Geomagnetic Observatory, Fredericksburg, USA on 2018-10-22 15:00:00 graph 8	2
	Cold Lake South, Alberta, Canada on 2018-10-22 14:00:00 graph 9	2

Top 10 Best and Worst Air Quality in North America