Sarnia, Ontario, Canada Air Quality

Monitoring Station · Sarnia, Canada
51
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
39 10pm
10
37
51 1am
39
39
39 4am
39
39
37 7am
37
37
37 10am
36
36
— 1pm
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—
— 4pm
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— 7pm
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Station readings
10
51
CAMS model adj +12
27
25
25
27
27
27
27
27
27
25
25
25
25
24
24

Air Quality Forecast (24h)

PM2.512.1 µg/m³ ✓ WHO
Moderate
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Nearby Monitoring Stations

32
Sarnia, Ontario, Canada
0.0 km PM2.5: 7.7 µg/m³
48
Sarnia, Ontario, Canada
0.0 km PM2.5: 11.5 µg/m³
50
Port Huron, Michigan, USA
5.3 km PM2.5: 12.0 µg/m³
56
Port Huron, Michigan, USA
5.3 km PM2.5: 14.5 µg/m³

Nearby Cities

48 Sarnia 48 Port Huron 47 Mount Clemens 36 Clinton Township 42 Shelby 45 Strathroy 28 Chatham 38 Saint Clair Shores 34 Sterling Heights

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-11T01:40 UTC.