Air Quality Health Index (AQHI)
| 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 |
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AQHI Observations and Forecasts
- Current AQHI calculated at 8:00 pm EDT May 18, 2024
- Environment Canada location AQHI forecasts updated at 5:00 pm EDT May 18, 2024
| Location | Current | Forecast Maximums | |
|---|---|---|---|
| Saturday, 8:00 pm | Saturday Night | Sunday | |
| Barrie | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Belleville | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Brampton | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Brantford | 3 Low Risk | 4 Moderate Risk | 4 Moderate Risk |
| Burlington | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Chatham | 3 Low Risk | 4 Moderate Risk | 5 Moderate Risk |
| Cornwall | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Dorset | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Grand Bend | 4 Moderate Risk | 4 Moderate Risk | 6 Moderate Risk |
| Guelph | 3 Low Risk | 4 Moderate Risk | 4 Moderate Risk |
| Hamilton Downtown | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Hamilton Mountain | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Hamilton West | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Kingston | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Kitchener | 3 Low Risk | 4 Moderate Risk | 4 Moderate Risk |
| London | 3 Low Risk | 4 Moderate Risk | 5 Moderate Risk |
| Milton | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Mississauga | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Newmarket | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| North Bay | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Oakville | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Oshawa | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Ottawa Downtown | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Parry Sound | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Peterborough | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Port Stanley | 3 Low Risk | 4 Moderate Risk | 5 Moderate Risk |
| Sarnia | 4 Moderate Risk | 4 Moderate Risk | 6 Moderate Risk |
| Sault Ste. Marie | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| St. Catharines | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Sudbury | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Thunder Bay | 3 Low Risk | 2 Low Risk | 3 Low Risk |
| Tiverton | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Toronto Downtown | 3 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Toronto East | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Toronto North | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Toronto West | 2 Low Risk | 3 Low Risk | 4 Moderate Risk |
| Windsor Downtown | 3 Low Risk | 4 Moderate Risk | 5 Moderate Risk |
| Windsor West | 3 Low Risk | 4 Moderate Risk | 5 Moderate Risk |
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.
AQHI Map (Table)