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  6. Saint Catharines

Saint Catharines

St. Catharines, Niagara Regional Municipality

2026-01-21 06:00
AQI (US)
Good
Pollutants
O3
μg/m³
70.7
PM2.5
μg/m³
3
NO2
μg/m³
10.3
Weather
  • ℃
  • ℉
-9℃
70%
13 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • O3
  • PM2.5
  • NO2
Places included
St. Catharines
AQI 31
Data Sources
http://www.airnow.gov/

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AQI 31
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Niagara Falls
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Welland
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Youngstown
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Lincoln
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Ransomville
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Port Colborne
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