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Pacific Southwest, Region 9

Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations

2008 Ground-Level Ozone Standards - Final Designations

On April 30, 2012, EPA finalized the area designations for the 2008 air quality standards for smog, also known as ground-level ozone. These decisions are based on air quality monitoring data, recommendations submitted by the states and tribes, and other technical information.

General background information on these designations:

For more information contact
John Kelly (kelly.johnj@epa.gov)
(415) 947-4151

Final Action

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Adobe Reader.

The documents listed below are EPA's area-specific analyses for our final determinations regarding the designation of areas in the Pacific Southwest (Region 9) for the 2008 ground-level ozone standards. These responses are provided in PDF format for INFORMATIONAL PURPOSES ONLY. For official designation listings, please refer to 40 CFR part 81, as updated in the Federal Register Notice for ozone designations.

AREA TECHNICAL SUPPORT DOCUMENTS EPA LETTER
ARIZONA State of Arizona - All Technical Analyses (PDF)
(21 pp, 716 K)
State of Arizona - All Appendices (PDF)
(8 pp, 646 K)
AZ Gov letter (PDF) (3 pp, 232 K)
Phoenix-Mesa nonattainment area Phoenix-Mesa Technical Analysis (PDF)
(21 pp, 716 K)
 
Maricopa County (p)    
Pinal County (p)    
Fort McDowell Yavapai Nation    Fort McDowell letter (PDF)
Salt River Pima-Maricopa Indian Community of the Salt River Reservation   Salt River letter (PDF)
Tohono O'odham Nation of Arizona (p)   Tohono O'odham letter (PDF)
Rest of State - unclassifiable/attainment
1Includes any Indian country, unless otherwise specified.
2For Appendices, please see "State of Arizona - All Appendices." 
CALIFORNIA State of California Summary document (PDF)
(5 pp, 34 K)
2
State of California - All Technical Analyses (PDF)
(212 pp, 3.8M)
State of California - All Appendices (PDF) (51 pp, 9M) 2
CA Gov letter (PDF) (3 pp, 317 K)
Calaveras County nonattainment area Calaveras Technical Analysis (PDF) (15 pp, 634 K) 2  
Calaveras County    
Chico (Butte County) nonattainment area Chico Technical Analysis (PDF) (9 pp, 348 K) 2  
Butte County    
Berry Creek Rancheria of Maidu Indians of California    Berry Creek letter (PDF)
Enterprise Rancheria of Maidu Indians of California    Enterprise Rancheria letter (PDF)
Mechoopda Indian Tribe of Chico Rancheria    Mechoopda letter (PDF)
Mooretown Rancheria of Maidu Indians of California   Mooretown letter (PDF)
Imperial County nonattainment area Imperial Technical Analysis (PDF) (9 pp, 298 K) 2  
Imperial County    
Quechan Tribe of the Fort Yuma Indian Reservation (p)   Quechan letter (PDF)
Torres Martinez Desert Cahuilla Indians    Torres Martinez letter (PDF)
Kern County (Eastern Kern) nonattainment area Kern Technical Analysis (PDF) (10 pp, 334 K) 2  
Kern County (p)    
Los Angeles-San Bernardino Counties (West Mojave Desert) nonattainment area West Mojave Technical Analysis (PDF) (11 pp, 446 K) 2  
Los Angeles County    
San Bernardino County (p)    
Twenty-Nine Palms Band of Mission Indians of California   Twenty-Nine Palms letter (PDF)
Los Angeles-South Coast Air Basin nonattainment area South Coast Technical Analysis (PDF) (13 pp, 537 K) 2  
Los Angeles County    
Orange County    
San Bernardino County (p)    
Riverside County (p)    
Cahuilla Band of Mission Indians of the Cahuilla Reservation   Cahuilla letter (PDF)
Ramona Band of Cahuilla   Ramona letter (PDF)
San Manuel Band of Mission Indians   San Manuel letter (PDF)
Soboba Band of Luiseno Indians   Soboba letter (PDF)
Mariposa County nonattainment area Mariposa Technical Analysis (PDF) (15 pp, 540 K) 2  
Mariposa County    
Nevada County (Western part) nonattainment area Nevada County Technical Analysis (PDF) (8 pp, 349 K) 2  
Nevada County (p)    
Riverside County (Coachella Valley) nonattainment area Coachella Technical Analysis (PDF) (11 pp, 387 K) 2  
Riverside County (p)    
Agua Caliente Band of Cahuilla Indians of the Agua Caliente Indian Reservation   Agua Caliente letter (PDF)
Augustine Band of Cahuilla Indians   Augustine letter (PDF)
Cabazon Band of Mission Indians   Cabazon letter (PDF)
Santa Rosa Band of Cahuilla Indians    Santa Rosa letter (PDF)
Torres Martinez Desert Cahuilla Indians    Torres Martinez letter (PDF)
Twenty-Nine Palms Band of Mission Indians of California   Twenty-Nine Palms letter (PDF)
Sacramento Metro nonattainment area Sacramento Metro Technical Analysis (PDF) (11 pp, 448 K) 2  
Sacramento County    
Yolo County    
Solano County    
Sutter County (p)    
El Dorado County (p)    
Placer County (p)    
Shingle Springs Band of Miwok Indians, Shingle Springs Rancheria (Verona Tract)   Shingle Springs letter (PDF)
United Auburn Indian Community of the Auburn Rancheria of California   United Auburn letter (PDF)
Yocha Dehe Wintun Nation   Yocha letter (PDF)
San Diego County nonattainment area San Diego Technical Analysis (PDF) (18 pp, 430 K) 2  
San Diego County    
Barona Group of Capitan Grande Band of Mission Indians of the Barona Reservation   Barona letter (PDF)
Campo Band of Diegueño Mission Indians of the Campo Indian Reservation   Campo letter (PDF)
Ewiiaapaayp Band of Kumayaay Indians   Ewiiaapaayp Letter (PDF)
Iipay Nation of Santa Ysabel    Iipay letter (PDF)
Inaja Band of Diegueño Mission Indians of the Inaja and Cosmit Reservation   Inaja letter (PDF)
Jamul Indian Village of California   Jamul letter (PDF)
La Jolla Band of Luiseño Indians    La Jolla letter (PDF)
La Posta Band of Diegueño Mission Indians of the La Posta Indian Reservation   La Posta letter (PDF)
Los Coyotes Band of Cahuilla and Cupeño Indians   Los Coyotes letter (PDF)
Manzanita Band of Diegueño Mission Indians of the Manzanita Reservation   Manzanita letter (PDF)
Mesa Grande Band of Diegueño Mission Indians of the Mesa Grande Reservation   Mesa letter (PDF)
Pala Band of Luiseño Mission Indians of the Pala Reservation    Pala letter (PDF)
Pauma Band of Luiseño Mission Indians of the Pauma and Yuima Reservation    Pauma letter (PDF)
Rincon Band of Mission Luiseño Indians of the Rincon Reservation   Rincon letter (PDF)
San Pasqual Band of Diegueño Mission Indians of California    San Pasqual letter (PDF)
Sycuan Band of the Kumeyaay Nation    Sycuan letter (PDF)
Viejas (Baron Long) Group of Capitan Grande Band of Mission Indians of the Viejas Reservation   Viejas letter (PDF)
San Francisco Bay Area nonattainment area SF Bay Area Technical Analysis (PDF) (12 pp, 439 K) 2  
San Francisco County    
Marin County    
Sonoma County (p)    
Napa County    
Solano County    
Contra Costa County    
Alameda County    
Santa Clara County    
San Mateo County    
Federated Indians of Graton Rancheria   Graton letter (PDF)
Lytton Rancheria of California   Lytton letter (PDF)
San Joaquin Valley nonattainment area SJV Technical Analysis (PDF) (16 pp, 488 K) 2  
San Joaquin County    
Stanislaus County    
Merced County    
Madera County    
Fresno County    
Kings County    
Tulare County    
Kern County (p)    
Big Sandy Rancheria of Mono Indians of California   Big Sandy letter (PDF)
Cold Springs Rancheria of Mono Indians of California   Cold Springs letter (PDF)
North Fork Rancheria of Mono Indians of California   North Fork letter (PDF)
Picayune Rancheria of Chuckchansi Indians of California    Picayune letter (PDF)
Santa Rosa Indian Community of the Santa Rosa Rancheria   Santa Rosa letter (PDF)
Table Mountain Rancheria of California   Table Mountain letter (PDF)
Tule River Indian Tribe of the Tule River  Reservation   Tule River letter (PDF)
San Luis Obispo (Eastern San Luis Obispo) nonattainment area SLO Technical Analysis (PDF) (15 pp, 492 K) 2  
San Luis Obispo County (p)    
Tuscan Buttes nonattainment area Tuscan Buttes Technical Analysis (PDF)
(9 pp, 343 K)2
 
Tehama County (p)    
Ventura County nonattainment area Ventura Technical Analysis (PDF) (10 pp, 327 K) 2  
Ventura County (p)    
Morongo Band of Mission Indians nonattainment area Morongo Technical Analysis (PDF) (8 pp, 368 K) 2 Morongo letter (PDF)
Morongo Band of Mission Indians' Indian country    
Pechanga Band of Luiseño Mission Indians of the Pechanga Reservation nonattainment area Pechanga Technical Analysis (PDF) (7 pp, 310 K) 2 Pechanga letter (PDF)
Pechanga Band of Luiseño Mission Indians of the Pechanga Reservation's Indian country    
Rest of State1 - unclassifiable/attainment
1Includes any Indian country, unless otherwise specified.
2
For Appendices, please see "State of California - All Appendices." 
 
HAWAII - unclassifiable/attainment  Hawaii Gov letter (PDF) (2 pp, 168 K)
NEVADA and ANY AREAS OF INDIAN COUNTRY - unclassifiable/attainment  Nevada Gov letter (PDF) (2 pp, 168 K)
AMERICAN SAMOA - unclassifiable/attainment Amer. Samoa letter (PDF) (2 pp, 168 K)
GUAM - unclassifiable/attainment  Guam letter (PDF) (2 pp, 168 K)
NORTHERN MARIANA ISLANDS - unclassifiable/attainment  CNMI letter (PDF) (2 pp, 171 K)

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