Castle Street, Saint John, NewBrunswick, Canada

Monitoring Station · Saint John, Canada
59
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
59 4pm
46
46
46 7pm
46
46
46 10pm
46
46
46 1am
46
46
46 4am
46
46
— 7am
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— 10am
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— 1pm
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Station readings
59
CAMS model adj +22
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24

Air Quality Trend (24h)

PM2.515.9 µg/m³ ×1.1 WHO
Moderate
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Nearby Monitoring Stations

32
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 7.7 µg/m³
31
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 7.4 µg/m³
38
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 9.1 µg/m³
34
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 8.2 µg/m³
22
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 5.3 µg/m³
32
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 7.7 µg/m³
23
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 5.5 µg/m³
36
Castle Street, Saint John, NewBrunswick, Canada
0.0 km PM2.5: 8.6 µg/m³

Nearby Cities

24 Saint John 24 Saint John West 22 Quispamsis 10 Fredericton 10 Fredericton Northside 23 Riverview 23 Lutes Mountain 23 Moncton 23 Dieppe

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-15T19:21 UTC.