The Bay Area Air Quality Management District

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  Spare the Air Bay Area 2.6

  The Bay Area Air Quality Management District - Freeware -

  Spare the Air Bay Area is the official air quality app for the nine counties surrounding San Francisco Bay: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, southwestern Solano, and southern Sonoma counties. more info...