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Air Permit Delegation and PSD SIP Approval Status in EPA Region 9

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Prevention Of Significant Deterioration

This page describes the air pollution control agencies in Region 9 that have the authority to issue Prevention of Significant Deterioration (PSD) permits. There are two ways an air agency in Region 9 can obtain the authority to issue PSD permits:

  • An agency may submit PSD rules to EPA for approval into the State Implementation Plan (SIP).
  • EPA may delegate PSD authority to an agency via a PSD Delegation Agreement.

Summaries of PSD Authority in Region 9 by State

PSD Authority in Arizona

Arizona Document(s) Effective Date Authority
Arizona Department of Environmental Quality (ADEQ) ADEQ Agency-Wide Provisions (Rules 18-2-401, 402, 406, 407, 409 & 412) 12/2/15 (except GHGS) SIP
Arizona Department of Environmental Quality (ADEQ) ADEQ GHG PSD Delegation Agreement 03/30/2011 (For GHG) Delegation
Maricopa County Air Quality Department (AQD) Maricopa AQD PSD Delegation Agreement 02/08/2016 Delegation
Pima County Department of Environmental Quality Pima County DEQ PSD Delegation Agreement 04/14/1994 Delegation
Pinal County Air Quality Control District Pinal County Agency-Wide Provisions 04/09/1996 SIP
Pinal County Air Quality Control District Pinal PSD GHG Delegation Agreement  08/10/2011 (For GHGs) Delegation

PSD Authority in California

California Document(s) Effective Date Authority
Bay Area Air Quality Management District Bay Area Agency-Wide Provisions (Rules 2-1 & 2-2) 08/01/2016 SIP
Butte County Air Quality Management District Butte County Agency-Wide Provisions (Rule 1107) 11/12/2015 SIP
Eastern Kern Air Pollution Control District Kern County Agency-Wide Provisions (Rule 210.4) 02/08/2013 SIP
Feather River Air Quality Management District Feather River Agency-Wide Provisions (Rule 10.10) 11/12/2015 SIP
Great Basin Unified Air Pollution Control District Great Basin Agency-Wide Provisions (Rule 221) 11/12/2015 SIP
Imperial County Air Pollution control Distirct Imperial County Agency-Wide Provisions (Rule 904) 02/08/2013 SIP
Mendocino County Air Pollution Control District Mendocino Agency-Wide Provisions (Rules 130, 200, 220, 230 & 240) 07/03/2017 SIP
Monterey Bay Unified Air Pollution Control District Monterey Bay Agency-Wide Provisions (Rule 207) 03/26/2015 SIP
North Coast Unified Air Quality Management District North Coast Agency-Wide Provisions (Rules 130, 200, 220, 230 & 240) 08/30/1985 SIP
North Coast Unified Air Quality Management District Partial PSD Delegation Agreement (Stack height, NOx increment) 01/08/1993 Delegation
North Coast Unified Air Quality Management District Partial PSD Delegation Agreement (NOx major modifications) 10/06/2015 Delegation
Northern Sonoma County Air Pollution Control District Northern Sonoma Agency-Wide Provisions (Rules 130, 200, 220, 230 & 240) 10/06/2016 SIP
Placer County Air Pollution Control District Placer County Agency-Wide Provisions (Rule 518) 02/08/2013 SIP
Sacramento Metro Air Quality Management District Sacramento Metropolitan Agency-Wide Provisions (Rule 203) 07/20/2011 SIP
San Joaquin Valley Air Pollution Control District San Joaquin Valley Agency-Wide Provisions (Rule 2410) 11/26/2012 SIP
San Luis Obispo Air Pollution Control District San Luis Obispo Agency-Wide Provisions (Rule 220) 11/12/2015 SIP
Santa Barbara Air Pollution Control District Santa Barbara Agency-Wide Provisions (Rule 810) 11/12/2015 SIP
South Coast Air Quality Management District South Coast PSD Delegation Agreement (Excluding GHG) 07/25/2007 Delegation
South Coast Air Quality Management District South Coast Agency-Wide Provisions - GHG Emissions only (Rule 1710) 12/10/2012 SIP
Yolo–Solano Air Quality Management District Yolo–Solano Agency-Wide Provisions (Rule 3.24) 02/08/2013 SIP
Ventura County Air Pollution Control District Ventura County Agency-Wide Provisions (Rule 26.13) 03/10/2017 SIP

PSD Authority in Nevada

Nevada Document(s) Effective Date Authority
Clark County Department of Air Quality Management Clark County-Agency-Wide Provisions (Section 12.2) 11/19/2012 SIP
Nevada Division of Environmental Protection Nevada DEP PSD Delegation Agreement 10/19/2004 Delegation
Washoe County District Health Department Washoe County DHD PSD Delegation Agreement 03/13/2008 Delegation

PSD Authority in Hawaii

Hawaii Document(s) Effective Date Authority
Hawaii Department of Health Hawaii DOH PSD Delegation Agreement 01/05/1989 Delegation

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Title V Operating Permit Program

Title V of the Clean Air Act requires state and local agencies to adopt an Operating Permit Program for major sources of air pollution. EPA sets forth these requirements under 40 CFR part 70. For areas that do not adopt the program, EPA is the permitting authority and implements the Operating Permit Program under 40 CFR part 71. All state or local agencies in Region 9 have an operating permit program. However, tribes located in Region 9 have not developed such programs. Thus, EPA is the permitting authority on tribal lands. EPA may delegate such authority to a tribe that meets the necessary requirements. Below are the Tribal agencies that have received a part 71 delegation of authority.

Navajo Nation Environmental Protection Agency

On October 15, 2004, EPA Region 9 and the Navajo Nation EPA (NNEPA) entered into a Delegation of Authority Agreement ("Agreement") which specifies the terms of the delegation. Since then, the tribe has taken over title V permitting responsibilities for twelve existing major stationary air pollution sources on the reservation. Under this agreement, Region 9 would continue to oversee the Part 71 permits for the Navajo Generating Station and the Four Corners Power Plant. Finally, Region 9 also determined that the NNEPA meets the eligibility requirements for treatment in the same manner as a state ("TAS") for the purpose of entering into the Agreement and has waived our collection of Part 71 permit fees for those sources covered by the Agreement in light of our determination that NNEPA can collect fees under tribal law sufficient to fund the delegated part 71 program. In 2006, the delegation agreement was supplemented to allow NNEPA to also take over title V permitting responsibilities for the Navajo Generating Station and the Four Corners Power Plant. A copy of the Agreements and related documents are included in the document link below.

Air Standards Delegations in Region 9

In addition to Air Permit Program delegations, EPA may delegate the authority to implement certain federal standards to state and local agencies. These standards are an integral part of the permitting program in that they may contain applicable requirements for sources that are permitted under the Clean Air Act. The link below will take you to the page with detailed information regarding delegation of federal standards, including new source performance standards (NSPS), national emissions standards for hazardous air pollutants (NESHAPs), and maximum achievable control technology (MACT) standards.


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