Sarnia: current Air Quality Health Index (AQHI)

Calculated at 2:00 am EDT Tuesday, July 21, 2026

5

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
• Issued at: 5:00 pm EDT July 20, 2026

Forecast Air Quality Health Index maximums for Sarnia

Period	Forecast maximum (Issued at 5:00 pm EDT July 20, 2026)
Monday	4 - Moderate Risk
Monday night	3 - Low Risk
Tuesday	2 - Low Risk

Health message for Sarnia

• Current Air Quality Health Index: 5
• Calculated at 2:00 am EDT Tuesday, July 21, 2026
• Risk: Moderate

At-risk population:

• Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms.
• Find out if you are at risk

General population:

• No need to modify your usual outdoor activities unless 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.