Puget Sound Clean Air Agency

Provides air quality monitoring stations throughout the region. Oddly, they are currently not testing air quality around Sea-Tac.

Puget Sound Regional Council (PSRC)

The most important government entity almost no one has heard of. A group of leaders representing the city’s, counties and Port Of Seattle. It is they who ultimately decide on siting or expanding the airport.

Kaplan Kirsch Rockwell

KKR are a law firm that specializes in airport law. They have a mailing list which publishes digests of relevant cases.