NASA GSFC Rutgers Calib. N15 Air Quality
Monitoring Station
· Alliston, Canada
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
56
6pm
55
55
57
9pm
57
57
55
12am
55
55
55
3am
57
57
57
6am
55
—
—
9am
—
—
—
12pm
—
—
—
3pm
—
—
Station readings
56
55
CAMS model
adj +30
27
25
25
27
27
27
25
25
25
25
27
27
27
25
Air Quality Forecast (24h)
PM2.513.8 µg/m³
✓ WHO
Moderate
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T21:38 UTC.