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Washington Air Quality

Tacoma-Puyallup is the worst air in Washington right now at an index of 63, which is Moderate, from fine particles (PM2.5). AirNow carries 49 reporting areas in the state. No air quality alert is in force.

Reporting areas: 49
Worst index now: 63
Alerts in force: 0
Towns under smoke: Unavailable

Radar

Reflectivity now over Washington. Open it to see the particulate forecast on the map.

Open the live radar with the particulate forecast

Radar mosaic and map layers from NOAA MRMS and NOAA National Air Quality Forecast Capability. Boundaries from the Iowa Environmental Mesonet.

Alerts in force

An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.

None are in force in Washington right now. All Washington warnings.

By city, now and the days ahead49

Every AirNow reporting area in Washington: what its monitors measured this hour, and what the state or local agency that forecasts for it expects today and tomorrow. Each area links to the nearest town’s page.

Reporting area	Now	Category now	Today	Tomorrow	Pollutant
Tacoma-Puyallup	63	Moderate	Good	Good	PM2.5
Seattle-Bellevue-Kent Valley	59	Moderate	Good	Good	PM2.5
Confederated Tribes and Bands of Yakama Nations	57	Moderate	Not forecast	Not forecast	PM2.5
Vancouver	57	Moderate	Good	Good	PM2.5
Sunnyside	55	Moderate	Good	Good	PM2.5
Wenatchee	55	Moderate	Good	Good	PM2.5
Kennewick	54	Moderate	Good	Good	PM2.5
Ellensburg	53	Moderate	Good	Good	PM2.5
Spokane	53	Moderate	Moderate	Moderate	PM2.5
Darrington	52	Moderate	Good	Good	PM2.5
Moses Lake	52	Moderate	Good	Good	PM2.5
Twisp	52	Moderate	Not forecast	Not forecast	PM2.5
Clarkston	51	Moderate	Good	Moderate	PM2.5
Omak	47	Good	Not forecast	Not forecast	PM2.5
Yakima	47	Good	Not forecast	Not forecast	PM2.5
Cascade of east King-Pierce counties	46	Good	Good	Good	PM2.5
Olympia-Lacey-Tumwater	46	Good	Good	Good	PM2.5
Bremerton-Silverdale-Bainbridge Island	44	Good	Good	Good	PM2.5
Walla Walla	41	Good	Good	Good	PM2.5
Bellingham	39	Good	Moderate	Good	PM2.5
Chehalis	39	Good	Good	Good	PM2.5
Spokane Tribe of Spokane Reservation	38	Good	Not forecast	Not forecast	PM2.5
Mesa	37	Good	Good	Good	PM2.5
Anacortes	36	Good	Good	Good	PM2.5
Ritzville	34	Good	Good	Good	PM2.5
Quincy	33	Good	Good	Good	PM2.5
Pullman	32	Good	Good	Good	PM2.5
Longview	31	Good	Good	Good	PM2.5
Rosalia	31	Good	Good	Good	PM2.5
Shelton	30	Good	Good	Good	PM2.5
Yacolt	28	Good	Good	Good	PM2.5
Dayton	25	Good	Good	Good	PM2.5
Pomeroy	25	Good	Not forecast	Not forecast	PM2.5
Aberdeen	24	Good	Good	Good	PM2.5
Colville	23	Good	Good	Good	PM2.5
Port Angeles	23	Good	Good	Good	PM2.5
Custer	22	Good	Moderate	Good	PM2.5
Port Townsend	21	Good	Good	Good	PM2.5
Raymond	18	Good	Not forecast	Not forecast	PM2.5
Mount Vernon	14	Good	Moderate	Good	PM2.5
Makah Indian Tribe of Makah Indian Reservation	13	Good	Not forecast	Not forecast	PM2.5
Taholah	13	Good	Good	Good	PM2.5
Everett-Marysville-Lynnwood	9	Good	Good	Good	PM2.5
Cascade foothills of King-Pierce Counties		No reading	Good	Good	PM2.5
Chelan		No reading	Good	Good	PM2.5
Lacrosse		No reading	Good	Good	PM2.5
Leavenworth		No reading	Good	Good	PM2.5
Maple Falls		No reading	Moderate	Good	PM2.5
Oak Harbor		No reading	Good	Good	PM2.5

The forecaster’s discussion

Written by Puget Sound Clean Air Agency for Tacoma-Puyallup and filed with AirNow.

For Sep 18-21 (Fri-Mon): Expect GOOD air quality this weekend.

Smoke

NOAA’s Hazard Mapping System smoke analysis could not be read just now.

Smoke on the radar over Washington

What this means

The index runs from 0 to 500. Good is 0 to 50, Moderate to 100, Unhealthy for Sensitive Groups to 150, Unhealthy to 200, Very Unhealthy to 300, and Hazardous above that. The figure reported for a place is the highest index among the pollutants measured there, and the pollutant that produced it is named beside it.

What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.

Towns

Air quality for any town in Washington: what is measured nearby, the category forecast for today and tomorrow, and NOAA’s model hour by hour. Largest first.

200 smaller towns

Smaller places have pages too; search for one on the air quality landing page.

Sources

Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.