Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Underground Injection Control (UIC)

Underground Injection Control in Region 9 (AZ, CA, HI, NV, MP, GU)

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

On this page:
  • Specific Efforts
  • Permitting and Registration
  • Tribal UIC
  • Contacts

Specific Efforts

  • Pinyon Plain Mine
  • Proposed Arizona Underground Injection Control Primacy Program
  • Cesspools in Hawaii
  • EPA's Review of California's Underground Injection Control Program

Permitting and Registration

  • Permits in EPA's Pacific Southwest (Region 9)
  • Register Injection Wells (online form)
    Register any class of injection well in EPA's Pacific Southwest (Region 9) using this online inventory form.

Tribal UIC

  • Tribal Wastewater
  • Final Rulemaking for the Navajo Nation Class II Underground Injection Control Program

Contacts

David Albright (albright.david@epa.gov)
U.S. EPA, Region 9
Manager, Groundwater Protection Section, WTR-4-2
75 Hawthorne Street
San Francisco, CA 94105
(415) 972-3971

Public Notice

Public notices related to UIC Permits in EPA's Pacific Southwest will appear here when available.

Events

Upcoming events related to EPA Region 9's Underground Injection Control program will appear here when available.

News Release

  • EPA issues first ever underground injection permits for carbon sequestration in California

EPA Staff and Regional Partners in EPA's Pacific Southwest
Area EPA Contacts State/Tribal Partnerships Contacts
Arizona

Deep Wells: Nancy Rumrill rumrill.nancy@epa.gov
(415) 972-3293

Shallow Wells: Kate Rao
(including drywell registration)
rao.kate@epa.gov
(415) 972-3533

Arizona Department of Environmental Quality (ADEQ)
Groundwater Protection Program
(602) 771-2322 or (602) 771-4362
California

Shallow Wells: David Albright albright.david@epa.gov
(415) 972-3971

Shallow Wells: Kate Rao
(including drywell registration)
rao.kate@epa.gov
(415) 972-3533

California Geologic Energy Management Division (CalGEM)
  • Class II Primacy and Geothermal
  • State Water Resources Control Board
Guam David Albright
albright.david@epa.gov
(415) 972-3971
Guam Environmental Protection Agency
Water Resources Program
Hawaii Large Capacity Cesspool Project: Kate Rao
rao.kate@epa.gov
(415) 972-3533
Department of Health, Safe Drinking Water Branch
Safe Drinking Water Branch
(808) 586-4258

Department of Health, Wastewater Branch
Wastewater Branch
(808) 586-4294

Navajo Nation David Albright
albright.david@epa.gov
(415) 972-3971

Navajo Nation Environmental Protection Agency
Underground Injection Control Program

Nevada Elise Nord
nord.elise@epa.gov
(415) 972-3079
Nevada Division of Environmental Protection
Underground Injection Control Program
Northern Mariana Islands David Albright
albright.david@epa.gov
(415) 972-3971

CNMI Bureau of Environmental and Coastal Quality

Tribes Kate Rao
rao.kate@epa.gov
(415) 972-3533
N/A
All Other Region 9 UIC Inventory Questions r9iWells@epa.gov N/A

Underground Injection Control (UIC)

  • Class I Industrial and Municipal Waste Disposal Wells
  • Class II Oil and Gas Related Injection Wells
  • Class III Injection Wells for Solution Mining
  • Class IV Shallow Hazardous and Radioactive Injection Wells
  • Class V Wells for Injection of Non-Hazardous Fluids into or Above Underground Sources of Drinking Water
  • Class VI Wells Used for Geologic Sequestration of CO2
Contact Us About Underground Injection Control
Contact Us About Underground Injection Control to ask a question, provide feedback, or report a problem.
Last updated on May 30, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.