The NSCAPCD boundary covers the northern and coastal regions of Sonoma County, with the southern portion of the County belonging to the Bay Air Quality Management District (BAAQMD). The dividing line begins just West of Valley Ford, going North past the East end of the Occidental area. It then runs Northeast between Graton and Forestville, and cuts across the Northwest corner of the Windsor city limit. It then runs due East all the way to the East edge of Sonoma County.
Communities within the BAAQMD
Bloomfield, Cotati, El Verano, Fulton, Glen Ellen, Graton, Kenwood, Penngrove, Petaluma, Rohnert Park, Santa Rosa, Sebastopol, Sonoma, Valley Ford, Windsor.
Communities within the NSCAPCD
Annapolis, Bodega, Bodega Bay, Camp Meeker, Cazadero, Cloverdale, Duncans Mills, Forestville, Geyserville, Guerneville, Healdsburg, Jenner, Monte Rio, Rio Nido, Sea Ranch.