Notice

An air quality alert is currently in effect for select areas in Ontario.

Visit Environment and Climate Change Canada (ECCC) Weather Information for detailed information on the active alert.

Our website will be updated soon to reflect Environment and Climate Change Canada’s new colour coded alert system.

Hamilton West: current Air Quality Health Index (AQHI)

Calculated at 12:00 am EST Thursday, March 5, 2026

5
5 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 Hamilton West

Forecast Air Quality Health Index maximums for Hamilton West
PeriodForecast maximum (Issued at 5:00 pm EST March 4, 2026)
Wednesday7 - High Risk High Risk, Wednesday
Wednesday night4 - Moderate Risk Moderate Risk, Wednesday night
Thursday3 - Low Risk Low Risk, Thursday

Health message for Hamilton West

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.