NASA GSFC Rutgers Calib. N15

Monitoring Station · Alliston, Canada
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
19 3pm
22
24
20 6pm
20
20
33 9pm
33
33
33 12am
20
20
33 3am
33
33
— 6am
—
—
— 9am
—
—
— 12pm
—
—
Station readings
19
22
24
CAMS model adj -17
37
37
37
37
37
37
50
50
50
50
37
37
50
50
50

Air Quality Trend (24h)

PM2.55.7 µg/m³ ✓ WHO
Good

Nearby Monitoring Stations

33
Barrie, Ontario
17.9 km PM2.5: 8.0 µg/m³
34
Barrie, Ontario, Canada
17.9 km
42
Barrie, Ontario, Canada
17.9 km
38
Barrie, Ontario, Canada
17.9 km
32
Barrie, Ontario, Canada
17.9 km
42
Newmarket, Ontario, Canada
31.6 km
33
Newmarket, Ontario, Canada
31.6 km
50
Newmarket, Ontario, Canada
31.6 km

Nearby Cities

23 Alliston 31 Innisfil 31 Barrie 39 Keswick 3 East Gwillimbury 6 Newmarket 25 Aurora 1 Wasaga Beach 25 Bolton

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T18:36 UTC.