Air quality in United States
Air quality in Washington today
Updated
Moderate: average US AQI 57 across 17 cities in Washington Worst now: Seattle (65); cleanest: Yakima (27).
Live US AQI, PM2.5 and ozone for cities across Washington, compared with the United States average.
- Average US AQI
- 57 Moderate
- United States average
- 52 619 cities
- Most polluted now
- Seattle AQI 65
- Cleanest now
- Yakima AQI 27
- Cities above 100
- 0
Air quality in Washington today
Right now the modelled air quality in Washington averages a US AQI of 57 (Moderate) across the 17 cities we track. By category: 4 Good, 13 Moderate (of 17).
That is 5 points worse than the United States average of 52, ranking 40 of 51 states from cleanest to most polluted.
Seattle has the worst air at 65 (PM2.5 14 µg/m³), and Yakima the cleanest at 27. No tracked city is above 100, so no group needs to change plans.
Washington cities by AQI (most polluted first)
| City | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Seattle | 65 | Moderate | 13.5 | 14 | 28 |
| Bellevue | 65 | Moderate | 13.5 | 14 | 28 |
| Kent | 65 | Moderate | 13.5 | 14 | 28 |
| Renton | 65 | Moderate | 13.5 | 14 | 28 |
| Burien | 65 | Moderate | 13.5 | 14 | 28 |
| Des Moines | 65 | Moderate | 13.5 | 14 | 28 |
| Vancouver | 60 | Moderate | 5.7 | 6 | 50 |
| Olympia | 59 | Moderate | 11.4 | 12 | 28 |
| Tacoma | 58 | Moderate | 12.5 | 13 | 24 |
| Everett | 58 | Moderate | 11.8 | 12 | 24 |
| Marysville | 58 | Moderate | 11.8 | 12 | 24 |
| Edmonds | 58 | Moderate | 11.8 | 12 | 24 |
| Redmond | 52 | Moderate | 5.7 | 6 | 43 |
| Kennewick | 49 | Good | 5 | 5 | 34 |
| Richland | 49 | Good | 5 | 5 | 34 |
| Spokane | 46 | Good | 5.3 | 6 | 48 |
| Yakima | 27 | Good | 5.2 | 5 | 37 |
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 Washington
- Air quality in Seattle
- Air quality in Spokane
- Air quality in Tacoma
- Air quality in Vancouver
- Air quality in Bellevue
- Air quality in Kent
- Air quality in Everett
- Air quality in Renton
- Air quality in Yakima
- Air quality in Kennewick
- Air quality in Marysville
- Air quality in Redmond
- Air quality in Olympia
- Air quality in Richland
- Air quality in Burien
- Air quality in Edmonds
- Air quality in Wenatchee
- Air quality in Walla Walla
- Air quality in Des Moines
- Air quality in Graham
More
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).