Area Designations for 1997 Ground-level Ozone Standards
Region 9: State Designations for the 1997 8-Hour Ozone Standard
Boundary Designations for the 1997 8-Hour Ozone Standard
- EPA Region 9
(as of September 18, 2009)
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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. See also the table of redesignated areas.
|
State |
Nonattainment Area Name |
Counties |
April 15, 2004 Classification |
Maximum Attainment Date (from June 15, 2004) |
Current/Proposed Classification | Resdesignation Effective Date |
|---|---|---|---|---|---|---|
| Arizona 1 |
Phoenix -Mesa Map (PDF) (2 pp, 55KB) |
Maricopa (P) Pinal (P) |
Former Subpart 1 | June 2009 | Former Subpart 1 | - |
| California 1 |
Los Angeles South Coast Air Basin, CA Map (PDF) (3 pp, 118KB) |
Los Angeles (P) Orange Riverside (P) San Bernardino (P) |
Severe-17 | June 2021 | Severe-17 | - |
| Riverside Co, CA (Coachella Valley) Map (PDF) (2 pp, 76KB) |
Riverside (P) | Serious | June 2013 | Serious | - |
|
| San Joaquin Valley, CA Map (PDF) (2 pp, 135KB) |
Fresno Kern (P) Kings Madera Merced San Joaquin Stanislaus Tulare |
Serious | June 2013 | Serious | - |
|
| Amador and Calavaras Cos (Central Mountain Counties), CA Map (PDF) (1 p, 65KB) |
Amador Calaveras |
Former Subpart 1 | June 2009 | Former Subpart 1 | - |
|
| Mariposa and Tuolumne Cos (Southern Mountain Counties), CA Map (PDF) (1 p, 73KB) |
Tuolumne Mariposa |
Former Subpart 1 | June 2009 | Former Subpart 1 | - |
|
| Sacramento Metro, CA Map (PDF) (2 pp, 134KB) |
El Dorado (P) Placer (P) Sacramento Solano (P) Sutter (P) Yolo |
Serious | June 2013 | Serious | - |
|
| Nevada (Western Part), CA Map (PDF) (1 p, 68KB) |
Nevada (P) | Former Subpart 1 | June 2009 | Former Subpart 1 | - |
|
| Los Angeles-San Bernardino Cos (W Mojave Desert), CA Map (PDF) (2 pp, 102KB) |
San Bernardino (P) Los Angeles (P) |
Moderate | June 2010 | Moderate | - |
|
| Ventura Co, CA Map (PDF) (1 p, 81KB) |
Ventura (P) | Moderate | June 2010 | Serious | - |
|
| Kern Co (Eastern Kern), CA Map (PDF) (2 pp, 58KB) |
Kern (P) | Former Subpart 1 | June 2009 | Former Subpart 1 | - |
|
| San Diego, CA Map (PDF) (1 p, 65KB) |
San Diego (P) | Former Subpart 1 | June 2009 | Former Subpart 1 | - |
|
| Imperial Co, CA Map (PDF) (1 p, 43KB) |
Imperial | Marginal | June 2007 | Moderate | - |
|
| Chico, CA Map (PDF) (1 p, 41KB) |
Butte | Former Subpart 1 | June 2009 | Former Subpart 1 | - |
|
| San Francisco Bay Area, CA Map (PDF) (2 pp, 158KB) |
Alameda Contra Costa Marin Napa San Francisco Santa Clara San Mateo Solano (P) Sonoma (P) |
Marginal | June 2007 | Marginal | - |
|
| Sutter County (Sutter Buttes), CA Map (PDF) (1 p, 38KB) |
Sutter (P) | Former Subpart 1 | June 2009 | Former Subpart 1 | - |
|
| Hawaii | entire state is attainment | |||||
| Nevada 1 | Las Vegas, NV 2 Map (PDF) (2 pp, 70KB) |
Clark | Former Subpart 1 | June 2009 | Former Subpart 1 | - |
1 Includes Tribal lands
2 See the Clark County, Nevada page for correspondence relating to the boundaries and effective date of the designation.