SWCAA's mission is to preserve and enhance air quality in southwest Washington.

The Southwest Clean Air Agency (SWCAA) is responsible for enforcing federal, state and local outdoor air quality standards and regulations in Clark, Cowlitz, Lewis, Skamania and Wahkiakum counties of southwest Washington state.  SWCAA was formed in 1967 pursuant to the Clean Air Act (RCW 70.94).  It has the responsibility for all outdoor air pollution sources within its five county jurisdiction, with the exception of automobiles, chemical paper and pulp mills, and aluminum reduction plants.  SWCAA is governed by an eleven member Board of Directors, made up of a representative from each county commission, one city council member from the largest city within each county, and a representative at large.