St. Catharines: current Air Quality Health Index (AQHI)

Calculated at 7:00 pm EDT Monday, June 30, 2025

2
2 pointer
1
2
3
4
5
6
7
8
9
10
+
low risk
(1 - 3)
moderate risk
(4 - 6)
high risk
(7 - 10)
very high risk

Forecast for St. Catharines

Forecast Air Quality Health Index maximums for St. Catharines
PeriodForecast maximum (Issued at 5:00 pm EDT June 30, 2025)
Monday night3 - Low Risk Low Risk, Monday night
Tuesday3 - Low Risk Low Risk, Tuesday

Health message for St. Catharines

At-risk population:

General population:

See the Ontario Ministry of the Environment, Conservation and Parks air quality health messages.

Note: AQHI readings on this web page are based on automatically polled data and have not undergone final verification.