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Underground Injection Control (UIC)

UIC Permits in EPA's Pacific Southwest (Region 9)

EPA Pacific Southwest (Region 9) implements and enforces federal environmental laws in Arizona, California, Hawaii, Nevada, the Pacific Islands, and 148 tribal nations.

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About UIC Permits in EPA's Pacific Southwest (Region 9)

Federal permits are required for all Class I, II, and III wells, and some Class V wells. For a permit application or related information, please see Region 9 contacts or visit the UIC Reporting Forms site. Region 9 states that have delegated programs have permit requirements that vary by jurisdiction and well type. Injection well owners are responsible for determining all applicable requirements. Permit requirements can be found in 40 CFR parts 124, 144 and 146.

Additional UIC information can be found at EPA's National UIC web site. For general questions, call the Safe Drinking Water Act Hotline at (800) 426-4791.

Community Involvement and Environmental Justice

EPA is supporting national Environmental Justice (EJ) goals by inviting communities to provide input during the permit application review process. To support early engagement between permittees and overburdened communities, EPA's Region 9 office has developed an Environmental Justice and Permitting Implementation Plan which the region follows in processing applications for EPA-issued UIC permits. In addition, EPA has developed a community engagement guide for potential permitees, entitled Promising Practices for Permit Applicants Seeking EPA-Issued Permits: Ways to Engage Neighboring Communities. Exit

Upcoming Events

Public event opportunities will appear here when available.

Open Comment Period

Public comment opportunities will appear here when available.

Closed Comment Period

Final UIC Permits

Class I

  • R9UIC-CA1-FY17-4
    Chalk Cliff Limited, Maricopa, CA
  • R9UIC-CA1-FY18-2
    Bakersfield Renewable Fuels LLC (formerly Alon Bakersfield Property Inc.)
  • CA10500002
    California Specialty Cheeses, Manteca, CA.
  • CA10910004
    Union Sugar No. 13, Santa Maria, CA.
  • CA10600002
    El Centro Generating Station, El Centro, CA.
    (Signed July 12, 2010, Minor Modification signed August 21, 2012)
  • CA10500001
    Hilmar Cheese Company, Hilmar, CA.
  • CA10710001
    CXA La Paloma LLC, McKittrick, CA.
  • R9UIC-CA1-FY17-2
    Live Oak Limited, Bakersfield, CA.
  • R9UIC-CA1-FY17-3
    McKittrick Limited, McKittrick, CA.
  • R9UIC-CA1-FY11-4
    Newhall Land and Farming Company Inc., Valencia, CA.
    (Signed January 9, 2006; Minor Modification signed May 22, 2008; Minor Modification No. 2 signed July 7, 2011)
  • CA10600001
    Panoche Energy Center LLC; Firebaugh, CA.
  • CA10910003
    Northern California Power Agency STIG Project #2 & Lodi Energy Center, Lodi, CA.
    (Permit signed October 16, 2009, Minor Modification signed April 20, 2011, Minor Modification signed May 20, 2013)
  • R9UIC-CA1-FY16-1
    San Joaquin Refining Company Limited, Bakersfield, CA.
  • CA10910002
    S.M.S. Briners Inc., San Joaquin County, CA.

Class III

Class V

  • AZ50800004
    Arizona Public Services (APS) Cholla Power Plant UIC Experimental Class V Permit (Carbon Sequestration), Navajo County, AZ.
  • R9UIC-CA5-FY11-3R CA
    Los Angeles Bureau of Sanitation Experimental Class V Permit (Biosolids Injection), San Pedro, CA.
  • R9UIC-CA5-FY13-1
     PG&E Test Injection/Withdrawal Well, King Island Gas Field, San Joaquin County, CA.
  • R9UIC-HI5-FY16-1R
    Puna Geothermal Venture, Pahoa, HI.

Application Withdrawn

  • R9UIC-CA5-FY09-1
    C6 Resource LLC Class V Experimental Injection Wells, Birds Landing, CA.

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