North America Air Pollution Statistics
Top 10 Best and Worst Air Quality in North America

Share: aqicn.org/statistics/north-america/

The statistics below corresponds to the real-time readings
last updated on .

Worst Air Quality Stations
Grand Forks City Hall, British Comlumbia, Canada
on 2026-07-31 08:00:00
199
graph 0
Madras, Oregon, USA
on 2026-07-31 08:00:00
179
graph 1
Enterprise, Oregon, USA
on 2026-07-31 08:00:00
178
graph 2
Cove City Hall, Oregon, USA
on 2026-07-31 08:00:00
176
graph 3
12th St, Walla Walla, Washington, USA
on 2026-07-31 10:00:00
133
graph 4
Williams Lake Columneetza School, British Comlumbia, Canada
on 2026-07-31 08:00:00
116
graph 5
Juliaetta, Idaho, USA
on 2026-07-31 07:00:00
112
graph 6
Regina, Saskatchewan, Canada
on 2026-07-31 09:00:00
104
graph 7
Grand Bend, Ontario, Canada
on 2026-07-31 09:00:00
104
graph 8
Glendora-Laurel, Los Angeles
on 2026-07-31 08:00:00
102
graph 9

Best Air Quality Stations
Niumalu, Hawaii, USA
on 2026-07-31 09:00:00
0
graph 0
Pierre, South Dakota, USA
on 2026-07-31 07:00:00
2
graph 1
Floyd Dryden, Alaska
on 2026-07-31 08:00:00
9
graph 2
Pictou, Nova Scotia, Canada
on 2026-07-31 08:00:00
9
graph 3
Douglas Red Cross, Arizona, USA
on 2026-07-31 09:00:00
10
graph 4
Laurel, Anchorage, Alaska
on 2026-07-31 08:00:00
10
graph 5
Vanderhoof, British Comlumbia, Canada
on 2026-07-31 08:00:00
11
graph 6
St. John's, NewFoundland, Canada
on 2026-07-31 06:30:00
13
graph 7
Kitimat Haul Road, British Comlumbia, Canada
on 2026-07-31 08:00:00
13
graph 8
Smithers Muheim Memorial, British Comlumbia, Canada
on 2026-07-31 08:00:00
15
graph 9


Statistics for other regions

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Air Quality Rankings

About the Air Quality and Pollution Measurement:

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.


Usage Notice: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.



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