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Protecting Underground Sources of Drinking Water from Underground Injection (UIC)

  • Underground Injection

    EPA regulates the construction, operation, permitting, and closure of injection wells used to place fluids underground for storage or disposal.  Learn more about injection well types.

  • Hydraulic fracturing with diesel fuels

    EPA has program requirements for permitting underground injection of diesel fuels in hydraulic fracturing to ensure protection of underground sources of drinking water (USDWs). Learn more about the permitting requirements.

  • Geologic sequestration of carbon dioxide

    EPA has finalized requirements that address carbon dioxide injection for long-term storage to ensure that wells used for geologic sequestration are appropriately sited, constructed, tested, monitored, funded, and closed. Read more about Class VI wells.

This website contains information for owners and operators of injection wells, regulators, and the public about safe injection well operations to prevent the contamination of underground sources of drinking water. 

At this time, EPA may face delays in processing paper UIC permit applications and Hazardous Waste petition requests due to precautions being taken during the current COVID-19 pandemic.  If you plan on submitting a permit application for an EPA-issued permit or a Hazardous Waste petition request, please refer to the webpage of the appropriate EPA Regional Office for information on contacting EPA via email, telephone/voicemail, or other electronic means before submitting paper documents to EPA.

UIC Topics in the Spotlight

UIC Where You Live

EPA has ten regional offices. Each regional office oversees local state, territory, and tribal UIC activities. Select your state from the menu below, or click on your region to find local UIC information about:

  • Public notices
  • Permitting and registration
  • Tribal concerns
  • Regional UIC guidance documents
  • Contacts
 

Map of the US, split into EPA regionsRegion 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, VermontRegion 2: New Jersey, New York, Puerto Rico, US Virgin IslandsRegion 3: Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, West VirginiaRegion 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, WisconsinRegion 6: Arkansas, Louisiana, New Mexico, Oklahoma, TexasRegion 7: Iowa, Kansas, Missouri, NebraskaRegion 8: Colorado, Montana, North Dakota, South Dakaota, Utah, WyomingRegion 9: Arizona, California, Hawaii, Nevada, Pacific IslandsRegion 10: Alaska, Idaho, Oregon, Washington

Additional Resources

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Last updated on January 20, 2023