| Station | Location | AQHI | AQHI Category | |
|---|---|---|---|---|
| Barrie | 83 Perry St. | 3 |  | Low Risk |
| Belleville | 2 Sidney St., Water Treatment Plant | 3 | | Low Risk |
| Brampton | 109 Mclaughlin Rd. S. | 3 | | Low Risk |
| Brantford | 324 Grand River Ave. | 4 |  | Moderate Risk |
| Burlington | North Shore Blvd. E. Lakeshore Rd. | 3 | | Low Risk |
| Chatham | 435 Grand Ave. W. | 4 | | Moderate Risk |
| Cornwall | Bedford St. 3rd St. W. | 2 |  | Low Risk |
| Dorset | 1026 Bellwood Acres Rd. | 3 | | Low Risk |
| Grand Bend | Point Blake Conservation Area | 4 | | Moderate Risk |
| Guelph | Exhibition St. Clark St. W. | 4 | | Moderate Risk |
| Hamilton Downtown | Elgin St. Kelly St. | 4 | | Moderate Risk |
| Hamilton Mountain | 250 Fennell Ave. W. | 4 | | Moderate Risk |
| Hamilton West | Main St. W. Hwy 403 | 4 | | Moderate Risk |
| Kingston | 23 Beechgrove Lane | 3 | | Low Risk |
| Kitchener | West Ave. Homewood Ave. | 4 | | Moderate Risk |
| London | 42 St. Julien St. | 4 | | Moderate Risk |
| Milton | 1120 Main St. E. | 3 | | Low Risk |
| Mississauga | 3359 Mississauga Rd. N., U of T Campus | 3 | | Low Risk |
| Newmarket | Eagle St. W. McCaffrey Rd. | 3 | | Low Risk |
| North Bay | Chippewa St. W., Dept. National Defence | 3 | | Low Risk |
| Oakville | Eighth Line, Glenashton Dr., Halton Res. | 3 | | Low Risk |
| Oshawa | Brittania Ave. W., Ep Taylor Stables | 3 | | Low Risk |
| Ottawa Downtown | Rideau St. Wurtemburg St. | 2 | | Low Risk |
| Parry Sound | 7 Bay St. | 3 | | Low Risk |
| Petawawa | Petawawa Research Forest Facility | 2 | | Low Risk |
| Peterborough | 10 Hospital Dr. | 3 | | Low Risk |
| Port Stanley | 43665 Dexter Line, Elgin Water T. Plt | 4 | | Moderate Risk |
| Sarnia | 700 Christina St. N. | 4 | | Moderate Risk |
| Sault Ste. Marie | Sault College | 3 | | Low Risk |
| St. Catharines | Argyle Cres., Pump Stn. | 4 | | Moderate Risk |
| Sudbury | 155 Elm St. | 3 | | Low Risk |
| Thunder Bay | 421 James St. S. | 3 | | Low Risk |
| Tiverton | 4th Concession, Bruce Rd. 23 | 3 | | Low Risk |
| Toronto Downtown | 55 John St. | 3 | | Low Risk |
| Toronto East | Kennedy Rd. Lawrence Ave. E. | 3 | | Low Risk |
| Toronto North | 4905 Dufferin St., Eccc | 3 | | Low Risk |
| Toronto West | 125 Resources Rd. | 3 | | Low Risk |
| Windsor Downtown | 467 University Ave. W. | 4 | | Moderate Risk |
| Windsor West | College Ave. South St. | 4 | | Moderate Risk |
Forecast: Ontario's Air Quality Health Index
- Environment Canada location AQHI forecasts updated at 5:00 pm EDT September 20, 2021.
Air Quality Health Index (AQHI) Categories
| Air Quality Health Index Categories and Values | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
|||||||
- The Air Quality Health Index on this web page are based on automatically polled data and have not undergone final verification.
- N/A (Not Available) denotes invalid or missing data.
Air Quality Health Index Categories and Health Messages
| Health Risk | Air Quality Health Index | Health Messages | |
|---|---|---|---|
| At Risk Population* | General Population | ||
| Low | 1 - 3 | Enjoy your usual outdoor activities. | Ideal air quality for outdoor activities. |
| Moderate | 4 - 6 | Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms. | No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation. |
| High | 7 - 10 | Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy. | Consider reducing or rescheduling strenuous activities outdoors if you experience symptoms such as coughing and throat irritation. |
| Very High | Above 10 | Avoid strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion. | Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation. |
* People with heart or breathing problems are at greater risk. Follow your doctor's usual advice about exercising and managing your condition.
Environment and Climate Change Canada website for AQHI readings and forecasts: https://www.canada.ca/en/environment-climate-change/services/air-quality-health-index.html
You can also get AQHI readings from recorded telephone messages by dialing 1-800-387-7768 (toll-free) or 416-246-0411 in Toronto.
