Area Designations for 2006 24-Hour Fine Particle (PM2.5) Standards
2006 24-Hour PM2.5 Standards — Region 9 Final Designations, October 2009a
Boundary Designations for the 2006 PM2.5 Standards - EPA Region 9
This table identifies all counties EPA has designated as nonattainment. In some cases EPA designated partial counties. These are identified by a (P). If a county is not listed below, EPA has designated it as unclassifiable/attainment.
| State | Area Name | Counties |
|---|---|---|
| American Samoa | Entire Territory is unclassifiable/attainment | |
| Arizona | Nogales, AZ | Santa Cruz (P) |
| West Central Pinal | Pinal (P) | |
| California | Chico, CA | Butte (P) |
| Imperial County, CA | Imperial (P) | |
| Los Angeles-South Coast Air Basin, CA | Los Angeles (P) Orange Riverside (P) San Bernardino (P) |
|
| Sacramento, CA | El Dorado (P) Placer (P) Sacramento Solano (P) Yolo (P) |
|
| San Francisco Bay Area, CA | Alameda Contra Costa Marin Napa San Francisco San Mateo Santa Clara Solano (P) Sonoma (P) |
|
| San Joaquin Valley, CA | Fresno Kern (P) Kings Madera Merced San Joaquin Stanislaus Tulare |
|
| Yuba City-Marysville, CA | Sutter Yuba (P) |
|
| Guam | Entire Territory is unclassifiable/attainment | |
| Hawaii | Entire State is unclassifiable/attainment | |
| Nevada | Entire State is unclassifiable/attainment | |
| Northern Marianas Islands | Entire Commonwealth is unclassifiable/attainment | |
aFinal designation for Pinal County, Arizona was announced in January 2011
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Recommendations from Region 9 States and EPA Responses
Region 9 Area Status December 2008 (Not Final)