Air quality in United States
Air quality in North Dakota today
Updated
Good: average US AQI 29 across 4 cities in North Dakota Worst now: Williston (57); cleanest: Fargo (17).
Live US AQI, PM2.5 and ozone for cities across North Dakota, compared with the United States average.
- Average US AQI
- 29 Good
- United States average
- 48 747 cities
- Most polluted now
- Williston AQI 57
- Cleanest now
- Fargo AQI 17
- Cities above 100
- 0
Air quality in North Dakota today
Right now the modelled air quality in North Dakota averages a US AQI of 29 (Good) across the 4 cities we track. By category: 3 Good, 1 Moderate (of 4).
That is 19 points cleaner than the United States average of 48, ranking 6 of 51 states from cleanest to most polluted.
Williston has the worst air at 57 (PM2.5 3.9 µg/m³), and Fargo the cleanest at 17. No tracked city is above 100, so no group needs to change plans.
North Dakota cities by AQI (most polluted first)
| City | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Williston | 57 | Moderate | 3.9 | 5 | 67 |
| Bismarck | 21 | Good | 2.7 | 3 | 65 |
| Grand Forks | 20 | Good | 2.2 | 3 | 64 |
| Fargo | 17 | Good | 3.6 | 4 | 56 |
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 North Dakota
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Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).