Air quality in Canada
Air quality in Nova Scotia today
Updated
Good: average US AQI 34 across 4 cities in Nova Scotia Worst now: Halifax (35); cleanest: Sydney, NS (31).
Live US AQI, PM2.5 and ozone for cities across Nova Scotia, compared with the Canada average.
- Average US AQI
- 34 Good
- Canada average
- 44 75 cities
- Most polluted now
- Halifax AQI 35
- Cleanest now
- Sydney, NS AQI 31
- Cities above 100
- 0
Air quality in Nova Scotia today
Right now the modelled air quality in Nova Scotia averages a US AQI of 34 (Good) across the 4 cities we track. By category: 4 Good (of 4).
That is 10 points cleaner than the Canada average of 44, ranking 4 of 8 provinces from cleanest to most polluted.
Halifax has the worst air at 35 (PM2.5 3.8 µg/m³), and Sydney, NS the cleanest at 31. No tracked city is above 100, so no group needs to change plans.
Nova Scotia cities by AQI (most polluted first)
| City | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Halifax | 35 | Good | 3.8 | 4 | 66 |
| Dartmouth | 35 | Good | 3.8 | 4 | 66 |
| Bedford | 35 | Good | 3.8 | 4 | 66 |
| Sydney | 31 | Good | 1.5 | 2 | 72 |
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Modelled by CAMS (Copernicus) via Open-Meteo, refreshed twice a day; read hour by hour from the forecast.
Cities in Nova Scotia
More
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).