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  4. Niagara Regional Municipality
  6. Saint Catharines

Saint Catharines

St. Catharines, Niagara Regional Municipality

2026-05-18 08:00
AQHI (Canada)
Low
Pollutants
O3
μg/m³
90
PM2.5
μg/m³
11
NO2
μg/m³
4.1
Weather
  • ℃
  • ℉
18℃
100%
20 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQHI (Canada)
  • O3
  • PM2.5
  • NO2
Places included
St. Catharines
AQI --
St. Catharines
AQI 3
St. Catharines
AQI --
Data Sources
http://www.airnow.gov/

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Cities Nearby

Saint Catharines
AQI 3
Thorold
AQI --
Niagara Falls
AQI --
Lewiston
AQI --
Niagara-on-the-Lake
AQI --
Niagara Falls
AQI --
Welland
AQI --
Youngstown
AQI --
Lincoln
AQI --
Ransomville
AQI --
Port Colborne
AQI 3