Sarnia, Ontario, Canada Air Quality

Monitoring Station · Sarnia, Canada
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
53 5am
93
93
100 8am
120
120
120 11am
120
91
91 2pm
91
90
91 5pm
91
91
— 8pm
—
—
— 11pm
—
—
— 2am
—
—
CAMS model adj +66
25
27
27
34
54
54
54
54
25
25
25
24
25
25
25

Air Quality Forecast (24h)

PM2.513.1 µg/m³ ✓ WHO
Moderate
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Nearby Monitoring Stations

53
Sarnia, Ontario, Canada
0.0 km PM2.5: 13.1 µg/m³
27
Sarnia, Ontario, Canada
0.0 km PM2.5: 6.5 µg/m³
55
Sarnia, Ontario, Canada
0.0 km PM2.5: 14.0 µg/m³
14
Sarnia, Ontario, Canada
0.0 km PM2.5: 3.4 µg/m³
42
Sarnia, Ontario, Canada
0.0 km PM2.5: 10.1 µg/m³
51
Port Huron, Michigan, USA
5.3 km PM2.5: 12.1 µg/m³
52
Port Huron, Michigan, USA
5.3 km PM2.5: 12.6 µg/m³

Nearby Cities

53 Sarnia 53 Port Huron 31 Mount Clemens 31 Clinton Township 31 Shelby 38 Strathroy 42 Chatham 59 Saint Clair Shores 42 Sterling Heights

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-08T08:22 UTC.