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  6. Saint Catharines

Saint Catharines

St. Catharines, Niagara Regional Municipality

2026-06-05 21:00
AQI (US)
Moderate
Pollutants
O3
μg/m³
145.7
PM2.5
μg/m³
12
NO2
μg/m³
4.1
Weather
  • ℃
  • ℉
27℃
53%
21 kph
2 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • O3
  • PM2.5
  • NO2
Places included
St. Catharines
AQI 94
Data Sources
http://www.airnow.gov/

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AQI 94
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Welland
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Lincoln
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Ransomville
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Port Colborne
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