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You searched for: Author United States. Environmental Protection Agency. Region IX Remove constraint Author: United States. Environmental Protection Agency. Region IX Format Shapefile Remove constraint Format: Shapefile Publisher California. Air Resources Board Remove constraint Publisher: California. Air Resources Board Subject Environment Remove constraint Subject: Environment Institution Stanford Remove constraint Institution: Stanford Year 2011 Remove constraint Year: 2011
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1. Particulate Matter (PM-10): Federal Area Designations: California, 2011

2011. United States. Environmental Protection Agency. Region IX. This polygon shapefile shows designated areas for particulate matter < 10 microns according to the 24-Hour National Ambient Air Quality Standard... California. Air Resources Board.