Region 8

Serving Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming and 27 Tribal Nations

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Region 8
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Underground Injection Control

Underground Injection Control

National Information

UIC Program

Regional Information

In a cooperative effort between EPA, state and tribal governments, the UIC Program works toward protecting underground sources of drinking water (USDW) from contamination by regulating the construction and operation of injection wells. Underground injection wells are primarily used to dispose of wastes into the subsurface and have the potential to adversely affect USDWs. Five classes of wells are defined according to the type of waste that is disposed and where the waste is injected. Detailed information on regulations can be found at EPA Regulations.

Region 8 States selector map

A brief description of the well types:
Class I: Industrial and Municipal Wells That Inject Beneath Lowermost USDW
Class II: Associated with Oil and Gas Production
Class III: Associated With Mineral Recovery
Class IV: Wells Injecting Hazardous Waste Into USDWs (Prohibited)
Class V: Injection Wells Not Included in Other Classes (typically Shallow Disposal Systems)

Public Notice of UIC Class II Permit-related Actions

In accordance with the requirements of 40 CFR Section 124.10, EPA’s Region 8 UIC Program is soliciting public comment on issuance of its permit-related actions under the authority of the Safe Drinking Water Act and UIC Program regulations. These actions, noted in the table below, would authorize the injection of fluids into the subsurface for the purpose of either enhancing the production of oil and gas resources or disposal of produced water associated with these operations, and may include a proposed Aquifer Exemption of the Proposed Injection Zone(s), per 40 CFR Section 146.4(b)(1). If an Aquifer Exemption is proposed, the portion(s) of the aquifer(s) to be exempted and the basis for EPA’s proposed exemption is included.

Comments are requested for no less than 30 calendar days from the last date EPA publishes its announcement of each action. All comments received by the end of the comment period will be considered in the formulation of any final decisions. If no comments are received by the comment deadline, the Regional Administrator of EPA Region 8 intends to issue a Final UIC Permit and/or Aquifer Exemption. EPA will hold a public hearing if the response to a specific action indicates significant public interest or if requested. For additional information on a specific action, please call or email the EPA contact person listed below.

All written comments and requests for additional information should be addressed to the EPA contact person atthe following address:
U.S. EPA Region 8, 8P-W-GW, UIC, 1595 Wynkoop Street, Denver, CO, 80202

Complete permit applications and related documents are also available for review and reproduction at this address from 10 a.m. to 4 p.m., Monday through Friday, federal holidays excluded. To make an appointment, please call the EPA contact.

View all permits and their respective public comment deadlines here (PDF)

View public notice for Powertech Incorporated (PDF)