5 days ago · In 2019, Seattle air quality averaged an annual PM2.5 concentration of 7.5 μg/m3, meeting both the Environmental Protection Agency (EPA) and ...
People also ask
What is the air quality in Seattle today?
Day | Pollution level | Weather |
Today | Good 9 AQI US | 60% |
Friday, Jan 12 | Good 5 AQI US | |
Saturday, Jan 13 | Good 8 AQI US | |
Sunday, Jan 14 | Good 10 AQI US |
What if air quality is over 500?
A rating anywhere between 301 and 500 is considered “hazardous,” and air quality at that level will trigger health warnings. At that level and beyond, everyone should stay indoors and reduce activity levels. “Use the same information that is for the 'hazardous' category,” the E.P.A. advises.
Why is it so foggy in Seattle?
The marine layer, or the fog and low clouds, are cool and more dense so they can't "float" up and into the atmosphere and therefore hovers near the ground for a long time. They are "capped" or "trapped" by the warm air directly above, and that's why the low clouds can't escape or evaporate, and we have low visibility.
How long does particulate matter stay in the air?
Some particles can remain in the atmosphere for days to weeks. Consequently, particle pollution generated in one area can travel hundreds or thousands of miles and influence the air quality of regions far from the original source.
AirNow is your one-stop source for air quality data. Our recently redesigned site highlights air quality in your local area first, while still providing air ...
Localized Air Quality Index and forecast for Seattle, WA. Track air pollution now to help plan your day and make healthier lifestyle decisions.