Air quality in United States
Air quality in South Dakota today
Updated
Good: average US AQI 24 across 5 cities in South Dakota Worst now: Rapid City (25); cleanest: Aberdeen, SD (22).
Live US AQI, PM2.5 and ozone for cities across South Dakota, compared with the United States average.
- Average US AQI
- 24 Good
- United States average
- 52 747 cities
- Most polluted now
- Rapid City AQI 25
- Cleanest now
- Aberdeen, SD AQI 22
- Cities above 100
- 0
Air quality in South Dakota today
Right now the modelled air quality in South Dakota averages a US AQI of 24 (Good) across the 5 cities we track. By category: 5 Good (of 5).
That is 28 points cleaner than the United States average of 52, ranking 1 of 51 states from cleanest to most polluted.
Rapid City has the worst air at 25 (PM2.5 5.4 µg/m³), and Aberdeen, SD the cleanest at 22. No tracked city is above 100, so no group needs to change plans.
South Dakota cities by AQI (most polluted first)
| City | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Rapid City | 25 | Good | 5.4 | 6 | 54 |
| Watertown | 25 | Good | 1.8 | 2 | 54 |
| Sioux Falls | 23 | Good | 3.8 | 4 | 53 |
| Brookings | 23 | Good | 2.2 | 3 | 45 |
| Aberdeen | 22 | Good | 3.5 | 4 | 45 |
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 South Dakota
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Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).