Sarnia: current Air Quality Health Index (AQHI)

Calculated at 12:00 pm EDT Friday, July 17, 2026

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 Sarnia

Forecast Air Quality Health Index maximums for Sarnia
Period	Forecast maximum (Issued at 6:00 am EDT July 17, 2026)
Friday	10+ - Very High Risk
Friday night	10+ - Very High Risk
Saturday	10+ - Very High Risk

Avoid strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion.
Find out if you are at risk

Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation.

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.