NASA GSFC Rutgers Calib. N15 Air Quality
Monitoring Station
· Alliston, Canada
52
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
55
7pm
52
57
57
10pm
57
55
55
1am
55
55
57
4am
57
57
55
7am
55
—
—
10am
—
—
—
1pm
—
—
—
4pm
—
—
Station readings
55
52
CAMS model
adj +30
25
25
27
27
27
25
25
25
25
27
27
27
25
25
Air Quality Forecast (24h)
PM2.512.7 µg/m³
✓ WHO
Moderate
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T22:04 UTC.