From the Washington Emergency Management Division:
Air quality continues to fluctuate throughout the state. Stay indoors as much as possible, try to keep your air indoors as clean as possible and limit outside activities.
This air quality map as of noon, Sept. 8 comes from https://www.airnow.gov/
and this is the site to look for individual air monitors around you:
https://tools.airfire.org/airtools/v1/pnw-smoke.html (both are mobile friendly).
Also, information from state Health & Ecology officials on health impacts of smoke from fires (updated with COVID-19 guidance) https://wasmoke.blogspot.com/