Air quality in Seattle today
United States · Updated Thursday 16:00 (local time) · Model data from the Copernicus Atmosphere Monitoring Service
Fair European AQI
Fine for almost everyone.
Pollutants right now
| Pollutant | Value | Level |
|---|---|---|
| PM2.5 | 11 µg/m³ | Fair |
| PM10 | 13 µg/m³ | Good |
| NO₂ | 15 µg/m³ | Good |
| O₃ | 55 µg/m³ | Fair |
The pollutant that matters most in Seattle right now is PM2.5.
Forecast: next 24 hours
Over the next 24 hours the air in Seattle is expected to be worst around Fri 01:00 (AQI 55, moderate). The cleanest hour is expected around Fri 10:00.
| Time | AQI | Level | PM2.5 |
|---|---|---|---|
| Thu 17:00 | 31 | Fair | 11 |
| Thu 20:00 | 47 | Moderate | 19 |
| Thu 23:00 | 53 | Moderate | 22 |
| Fri 02:00 | 55 | Moderate | 22 |
| Fri 05:00 | 53 | Moderate | 19 |
| Fri 08:00 | 33 | Fair | 9 |
| Fri 11:00 | 19 | Good | 3 |
| Fri 14:00 | 22 | Fair | 2 |
The last 30 days
Over the last 30 days the average daily AQI in Seattle was 36, with 0 day(s) rated poor or worse. The cleanest day was 2 Sept, the most polluted 18 Sept.
Questions and answers
- Is the air in Seattle good today?
- Right now the European Air Quality Index in Seattle is 33, which is fair. Fine for almost everyone.
- What pollutes the air in Seattle?
- At the moment PM2.5 contributes most to the air quality index in Seattle. The index takes the worst of fine particles (PM2.5), coarser particles (PM10), nitrogen dioxide, ozone and sulphur dioxide.
- When will the air in Seattle be cleanest?
- Over the next 24 hours the air in Seattle is expected to be worst around Fri 01:00 (AQI 55, moderate). The cleanest hour is expected around Fri 10:00.
- Where does this data come from?
- Wheezair shows model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), served by Open-Meteo: about 11 km resolution in Europe and 40 km elsewhere, updated daily. They are not station measurements, so a busy street can be worse than its city's value.