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Pacific Southwest, Region 9

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

Air Actions, California

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Adequacy Review of SIP Submissions for Conformity

In EPA's adequacy review, the Agency determines whether the motor vehicle emissions budgets in the State Implementation Plan (SIP) are adequate for conformity purposes.

For more information on SIP submissions currently under EPA adequacy review and SIP submissions EPA has already found adequate, see the EPA's Office of Transportation and Air Quality Transportation Conformity Web Site.

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California-Wide and Multi-Area

Final Rule to Designate the Morongo Reservation Its Own Nonattainment Area for the 1-hour Ozone and 1997 8-hour Ozone Standards Consistent with Our Action for the 2008 8-hour Ozone Standard

September 4, 2013 - EPA has finalized a rule to correct an error that affected the Morongo Reservation. This final action makes the Morongo Reservation its own nonattainment area for 1-hour ozone and the 1997 8-hour ozone standards. The Reservation is already its own nonattainment area for the 2008 8-hour ozone standard as a result of a 2012 EPA action.

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Error Correction and Designation of the Morongo Reservation

On December 20, 2012, EPA proposed to correct an error in a previous rulemaking that revised the boundaries between nonattainment areas in Southern California established under the Clean Air Act for the purpose of addressing the revoked one-hour ozone air quality standard. EPA is also proposing to redesignate the areas of Indian country of the Morongo Band of Mission Indians, California (Morongo Reservation) as a separate air quality planning area for the one-hour and 1997 eight-hour ozone standards. If finalized, the Morongo Reservation will be its own nonattainment area for each of the federal ozone standards.


Final Rule Determining Attainment for the 2006 24-Hour PM2.5 National Ambient Air Quality Standard in the Chico Nonattainment Area

On August 22, 2013, Regional Administrator Jared Blumenfeld signed a final rule determining that the Chico nonnattainment area in Butte County, California has attained and continues to attain the 2006 24-hour PM 2.5 National Ambient Air Quality Standard.

Final Rule Determining Attainment for the 2006 24-Hour PM2.5 National Ambient Air Quality Standard in the Yuba City-Marysville Nonattainment Area

On December 18, 2012, Regional Administrator Jared Blumenfeld signed a final rule determining that the Yuba City-Marysville nonattainment area has attained and continues to attain the 2006 24-hour PM 2.5 National Ambient Air Quality Standard.


Proposed Determination of Attainment for the 2006 24-Hour PM2.5 National Ambient Air Quality Standard in the Chico (Butte County) and Yuba City-Marysville Nonattainment Areas


EPA Determinations that Seven Areas in California have Attained the 1997 Ozone National Ambient Air Quality Standard

On November 19, 2012, Regional Administrator Jared Blumenfeld signed a final rule determining that seven ozone nonattainment areas in California have attained and continue to attain the 1997 8-hour ozone National Ambient Air Quality Standard. The seven ozone nonattainment areas are: Amador and Calaveras Counties, Butte County (Chico), Kern County (Eastern Kern), Mariposa and Tuolumne Counties, Nevada County (Western Part), Sutter County (Sutter Buttes), and Ventura County.


Final Approval of California Fumigant VOC Regulations and Revisions to the California SIP Pesticide Element for San Joaquin Valley

On August 14, 2012, EPA approved pesticide measures submitted by the California Department of Pesticide Regulation (DPR) to reduce volatile organic compound emissions from pesticides in five California ozone nonattainment areas: South Coast, Southeast Desert, Ventura, San Joaquin Valley, and Sacramento Metro. These measures include DPR's field fumigant regulations and revisions to the California SIP pesticide element. This action will be published in the in the Federal Register.

Contact Information
Frances Wicher (Wicher.Frances@epa.gov), (415) 972-3957
Nancy Levin (Levin.Nancy@epa.gov), (415) 972-3848

Proposed Approval of California Fumigant VOC Regulations and Revisions to the California SIP Pesticide Element for San Joaquin Valley

On April 13, 2012, EPA proposed to approve pesticide measures submitted by the California Department of Pesticide Regulation (DPR) to reduce volatile organic compound emissions from pesticides in five California ozone nonattainment areas: South Coast, Southeast Desert, Ventura, San Joaquin Valley, and Sacramento Metro. These measures include DPR’s field fumigant regulations and revisions to the California SIP pesticide elements. We are taking public comments for 30 days after the publication of our action in the Federal Register.

For further information, please contact Frances Wicher (Wicher.Frances@epa.gov), (415) 972-3957.


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Final actions on California's Interstate Transport State Implementation Plan (SIP) for the 1997 8-hour ozone NAAQS and 1997 fine particulate (PM2.5) NAAQS

Clean Air Act section 110(a)(2)(D)(i) requires that the California SIP contain adequate provisions to prohibit emissions from adversely impacting downwind states. These "good neighbor" requirements address four specific elements: 1) significant contribution to nonattainment of the NAAQS, 2) interference with maintenance of the NAAQS, 3) interference with required measures for prevention of significant deterioration (PSD), and 4) interference with required measures to protect visibility. Over the period of May 9, 2011 to July 29, 2011, EPA finalized action on all four elements of the California Interstate Transport SIP for the 1997 8-hour ozone NAAQS and 1997 PM2.5 NAAQS. These actions were published as follows:

  • Limited approval and limited disapproval of element 3 (interference with PSD)

Final Approval of California's Regional Haze Plan

On May 9, 2011, EPA finalized action to approve a revision to the California State Implementation Plan (SIP).  We found that that the California Regional Haze Plan fulfilled the Clean Air Act requirement to make reasonable progress towards the national goal of achieving natural visibility conditions in the state's twenty-nine Class I areas.  Class I areas are national parks, national forests, wilderness areas, and national seashores where visibility is an important value. We provided a 30-day comment period with our March 15, 2011 proposal and received no comments on our proposed action.


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Final Rule Granting Reclassification Requests for Four 8-hour Ozone Nonattainment Areas in California

On April 15, 2010, EPA's Region 9 Regional Administrator signed a final rule to grant requests from the State of California to reclassify four 8-hour ozone nonattainment areas as follows: San Joaquin Valley from "serious" to "extreme", South Coast Air Basin from "severe-17" to "extreme", and Sacramento Metro and Coachella Valley from "serious" to "severe-15". As part of this action, we are also reclassifying the tribal lands of 20 affected Tribes within these nonattainment areas, and are deferring the reclassification of tribal lands pertaining to the Morongo Band of Mission Indians and the Pechanga Band of Luiseno Mission Indians pending our final decisions on boundary change requests from each Tribe. These reclassifications set later attainment deadlines for each area while also requiring the State to meet more stringent requirements. While the State has already submitted most of the required revisions to the state implementation plan (SIP), this rule sets a schedule for the submission of the remaining SIP revisions. To view the proposed rule, please click the link below.


California SIP Revision: Carbon Monoxide Second Ten-Year Maintenance Plan Approval (November, 2005): Includes motor vehicle emissions budgets (MVEBs) that will become effective 60 days after publication in the Federal Register.

Title V Air Permits in California: includes EPA’s final rule that returned the operating permits program to 34 California districts, Settlement Agreement between EPA and California citizen and environmental groups, and EPA's final rule to partially withdraw approval of California's operating permits program.

California New Source Review: Call for Revision to State Law to remove exemption for major agricultural stationary sources

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Baja

Air Quality Management Plans

The Program to Improve Air Quality in Tijuana-Rosarita 2002-2005 and Program to Improve Air Quality in Mexicali 2002-2005 represent the joint effort between the public, the local economic sector, and the three levels of government, to design and implement a set of actions with the purpose of controlling the sources of pollutants that affect air quality in the cities.

Imperial Valley

Revision to California State Implementation Plan, Imperial County APCD Regulation 8

On March 28, 2013, EPA approved improvements to Imperial County Air Pollution Control District's (ICAPCD) rules that regulate emissions of inhalable particulate matter. This action terminates highway sanctions that went into effect in the County on August 9, 2012 and were stayed on January 7, 2013. Today's action is consistent with EPA's commitments made in a Settlement Agreement reached with ICAPCD and California Department of Parks and Recreation (State Parks) on July 27, 2012.

Additional Ozone and PM10 Actions in Imperial County »

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Inyo

Final Action on Coso Junction Planning Area 2010 PM-10 Maintenance Plan & the State of California’s Redesignation Request
On July 29, 2010, in a final rulemaking action, we redesignated the Coso Junction Planning Area (CJPA) to attainment for the PM-10 National Ambient Air Quality Standard (NAAQS) and approved the PM-10 maintenance plan for the area, as requested by the State of California. The primary cause of the PM-10 problem in the CJPA has been windblown dust emissions from Owens Lake. With jurisdiction over the Owens Lake area and the CJPA, the Great Basin Unified Air Pollution Control District (GBUAPCD) has adopted significant controls for Owens Lake dust and we are approving them as part of the CJPA’s maintenance plan. We provided a 30-day comment period for our June 24, 2010 proposal and received no comments.

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Proposed Action on Coso Junction Planning Area 2010 PM-10 Maintenance Plan & the State of California’s Redesignation Request
On June 24, 2010, we proposed that the Great Basin Unified Air Pollution Control District (GBUAPCD) fulfilled The Clean Air Act (CAA) requirements for redesignations and maintenance plans for the Coso Junction Planning Area (CJPA). Consequently, as requested by the State of California, we are proposing to redesignate the CJPA to attainment of the PM-10 National Ambient Air Quality Standard (NAAQS). Our proposal discusses how the CJPA has met the requirements for redesignation including attainment of the PM-10 NAAQS, permanent and enforceable emission reductions resulting in attainment of the standard, an accurate and up to date emissions inventory, commitments for ensuring continued attainment of the PM-10 NAAQS, and contingency measures. We are taking public comments on our proposal for 30 days after its publication within the Federal Register.

For our determination of attainment of the PM-10 NAAQS for the CJPA, please see our actions described below.

Final Determination of Attainment for the PM-10 Standard in the Coso Junction Planning Area
On May 13, 2010, we finalized our determination that the Coso Junction Nonattainment Area (CJNA) has attained the 24-hour National Ambient Air Quality Standard (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to a nominal ten micrometers (PM-10) based on quality-assured and certified air quality data from 2006 through 2008.  In addition, air quality data for 2009 and preliminary data for 2010 show that the CJNA continues to attain the PM-10 NAAQS.  Also, we finalized our determination that certain Clean Air Act requirements are not applicable for as long as the CJNA continues to attain the PM-10 NAAQS.  Currently, we are obligated under a consent decree either to reclassify (or “bump-up”) the CJNA from “moderate” to “serious”, or to redesignate the area to attainment for PM-10 by July 31, 2010. 

Proposed Determination of Attainment for the PM-10 Standard in the Coso Junction Planning Area
On March 23, 2010, we proposed to determine that the Coso Junction Nonattainment Area (CJNA) has attained the 24-hour PM-10 National Ambient Air Quality Standard (NAAQS) based on quality-assured and certified air quality data from 2006 through 2008.  In addition, air quality data for 2009 and preliminary data for 2010 show that the CJNA continues to attain the NAAQS.  Also, we proposed to determination that certain Clean Air Act requirements are not applicable for as long as the CJNA continues to attain the PM-10 NAAQS.

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Monterey Bay Region

On November 6, 2009, EPA's Regional Administrator signed a direct final rule to approve the Monterey Bay Region's Maintenance Plan for Ozone. The plan, prepared by Monterey Bay Unified Air Pollution Control District and California Air Resources Board, shows the area will continue to maintain the 8-hour ozone standard through the year 2014.

Owens Valley

Owens Valley Particulate Matter (PM-10) Pollution »

Sacramento Metro Area

Approval of Redesignation Request and Maintenance Plan for Sacramento County for PM10 Standard

On September 12, 2013, Regional Administrator Jared Blumenfeld signed a notice of final rulemaking to approve California's request to redesignate the Sacramento County nonattainment area to attainment for the PM10 National Ambient Air Quality Standard and their plan for continuing to attain the PM10 standard for ten years beyond redesignation.

Additional Sacramento Metro Area Actions »

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San Diego

Final Rule Approving Redesignation Request and Maintenance Plan for San Diego County for 1997 Ozone Standard

On May 14, 2013, EPA's Region 9 Regional Administrator signed a notice of final rulemaking to approve California’s request to redesignate the San Diego County ozone nonattainment area to attainment for the 1997 8-hour ozone National Ambient Air Quality Standard and their plan for continuing to attain the 1997 ozone standard for ten years beyond redesignation.

Proposed Approval of Redesignation Request and Maintenance Plan for San Diego County for 1997 Ozone Standard

On March 14, 2013, EPA's Region 9 Regional Administrator signed a notice of proposed rulemaking to approve California’s request to redesignate the San Diego County ozone nonattainment area to attainment for the 1997 8-hour ozone National Ambient Air Quality Standard and their plan for continuing to attain the 1997 ozone standard for ten years beyond redesignation.

San Francisco Bay Area

Final Rule Determining Attainment for the 2006 24-Hour PM2.5 National Ambient Air Quality Standard in the San Francisco Bay Area Nonattainment Area

On December 18, 2012, Regional Administrator Jared Blumenfeld signed a final rule determining that the San Francisco Bay Area nonattainment area has attained and continues to attain the 2006 24-hour PM 2.5 National Ambient Air Quality Standard.

Proposed Determination of Attainment for the 2006 24-Hour PM2.5 National Ambient Air Quality Standard in the San Francisco Bay Area Nonattainment Area.

San Francisco Bay Area Ozone Actions
San Francisco Bay Area Refinery Title V Permits

Settlement Agreement with Communities for a Better Environment and Our Children’s Earth Foundation regarding EPA's approval of the Bay Area Air Quality Management District's Title V Program

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San Joaquin Valley

Final Approval of the San Joaquin Valley 1997 PM2.5 Contingency Measures

On April 28, 2014, the EPA approved the San Joaquin Valley's 1997 PM2.5 NAAQS contingency measures. The sanctions and FIP clocks that were triggered by the EPA's 2011 disapproval of these PM2.5 contingency measures will be terminated upon the effective date (30 days from the date of publication in the Federal Register) of this action.

San Joaquin Valley Unified Air Pollution Control District: Revisions to the California State Implementation Plan

San Joaquin Valley Particulate Matter (PM-10) Pollution »
San Joaquin Valley Particulate Matter (PM-2.5) Pollution »
San Joaquin Valley Ozone Actions »
Related Information: New Source Review Rules »

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South Coast

South Coast Air Actions »

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Southeast Desert

Final Determination of Failure to Attain the 1-hour Ozone Standard for San Joaquin Valley, South Coast and Southeast Desert

On December 16, 2011 EPA finalized its determination that the South Coast, San Joaquin Valley and the Southeast Desert 1-hour ozone nonattainment areas have failed to attain the 1-hour ozone standard by their applicable attainment date. Today's final action includes response to public comments.

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Proposed Determinations of Failure to Attain the 1-hour Ozone Standard for San Joaquin Valley, South Coast and Southeast Desert

On September 1, 2011 EPA proposed to find that the South Coast, San Joaquin Valley and the Southeast Desert 1-hour ozone nonattainment areas have failed to attain the 1-hour ozone standard by their applicable attainment date. EPA is required to make these determinations to ensure implementation of certain 1-hour ozone requirements, such as contingency measures and section 185 major stationary source fee programs, which are given effect by such determinations. The public is invited to comment for 30 days after the publication of this action in the Federal Register.

Contact Information
Doris Lo (lo.doris@epa.gov)
(415) 972-3959

Ventura County

On May 27, 2009, the EPA took final action on a request from California to find that the Ventura County, California area attained the revoked 1-hour ozone standard by its attainment date. The action took effect on July 27, 2009.

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On May 20, 2008, EPA took final action to grant the request from California Air Resources Board (CARB) to reclassify Ventura County's 8-hour ozone non-attainment area from "moderate" to "serious". This reclassification was effective June 19, 2008.


On July 3, 2008, EPA signed a final rule that approves revisions to the California State Implementation Plan for Ventura County for 1-hour ozone. This proposed revision would revise a control measure related to emissions of volatile organic compounds in Ventura County caused by the use of pesticides.

On April 15, 2008, EPA signed a proposal that approves revisions to the California State Implementation Plan for Ventura County for 1-hour ozone. This proposed revision would revise a control measure related to emissions of volatile organic compounds in Ventura County caused by the use of pesticides.

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