Castle Street, Saint John, NewBrunswick, Canada

Monitoring Station · Saint John, Canada
31
Good
Air quality is satisfactory. Enjoy outdoor activities.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
25 6pm
27
34
34 9pm
34
34
34 12am
34
34
34 3am
34
34
27 6am
25
25
— 9am
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— 12pm
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— 3pm
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Air Quality Trend (24h)

PM2.57.4 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

32
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 7.7 µg/m³
36
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 8.6 µg/m³
38
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 9.1 µg/m³
32
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 7.7 µg/m³
40
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 9.6 µg/m³
24
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 5.8 µg/m³
36
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 8.6 µg/m³
34
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 8.2 µg/m³

Nearby Cities

27 Saint John 25 Saint John West 23 Quispamsis 10 Fredericton 10 Fredericton Northside 28 Riverview 28 Lutes Mountain 28 Moncton 28 Dieppe

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-14T21:59 UTC.