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
Biblioteca, San Luis Potosí, Mexico
on 2026-09-11 01:00:00
865
graph 0
Otay Mesa - Donovan Correctional Facility, San Diego, California
on 2026-09-11 01:00:00
138
graph 1
Santiago Acahualtepec, México, Mexico
on 2026-09-11 02:00:00
114
graph 2
Eagle Pass, Laredo, Texas
on 2026-09-11 01:00:00
103
graph 3
7th Ave, Marysville, Washington, USA
on 2026-09-11 03:00:00
93
graph 4
Universidad, Monterrey, Nuevo León, Mexico
on 2026-09-11 02:00:00
91
graph 5
Fresno - Drummond Street, Fresno, California
on 2026-09-11 01:00:00
90
graph 6
Miravalle, Guadalajara, Mexico
on 2026-09-11 02:00:00
85
graph 7
Waterbury, Connecticut, USA
on 2026-09-11 02:00:00
81
graph 8
Sorel-Tracy - secteur de Saint-Joseph-de-Sorel, Quebec, Canada
on 2026-09-11 01:00:00
78
graph 9

Best Air Quality Stations
Valemount Firehall, British Comlumbia, Canada
on 2026-09-11 01:00:00
3
graph 0
Pierre, South Dakota, USA
on 2026-09-11 02:00:00
5
graph 1
Douglas Red Cross, Arizona, USA
on 2026-09-11 02:00:00
5
graph 2
Fort St John Key Learning Centre, British Comlumbia, Canada
on 2026-09-11 01:00:00
7
graph 3
Grimshaw, Alberta, Canada
on 2026-09-11 02:00:00
10
graph 4
SDS01, Mérida, Yucatán, Mexico
on 2026-09-11 00:00:00
11
graph 5
Quesnel Johnston Avenue, British Comlumbia, Canada
on 2026-09-11 01:00:00
12
graph 6
FNSB NP Fire, Alaska
on 2026-09-11 00:00:00
13
graph 7
Hilo, Hawaii, USA
on 2026-09-11 01:00:00
13
graph 8
Pictou, Nova Scotia, Canada
on 2026-09-11 01:00:00
14
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

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no riskNone
51 -100ModerateAir 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.
101-150Unhealthy for Sensitive GroupsMembers 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.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effectsActive 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
201-300Very UnhealthyHealth 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+HazardousHealth alert: everyone may experience more serious health effectsEveryone 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.