Connecticut Underground Injection Wells: What you need to know

Governing Law and Regulations

State underground injection rules: 22a-430-8 Regulations of Connecticut State Agencies (RCSA)

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Prohibition of underground injection wells for hazardous waste disposal: 22a-449(c)-104(d) RCSA

Class V wells: 22a-430-8(c) RCSA

On-site sewage disposal: 19-13-B104a to 19-13-B104d RCSA

Regulatory Agencies

Connecticut Department of Environmental Protection (DEP) Bureau of Water Protection and Land Reuse Subsurface Sewage Disposal Program

Connecticut Department of Public Health (CDPH) Regulatory Services Branch Environmental Engineering Program

Local health departments

U.S. Environmental Protection Agency (EPA) Region 1

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. EPA granted primacy to Connecticut to administer the requirements of the federal underground injection control (UIC) program requirements. The state generally follows the federal rules. However, the underground injection of hazardous wastes is prohibited in Connecticut.

See the national section UNDERGROUND INJECTION WELLS for more information about the federal UIC program.

The state also has additional requirements for certain Class V wells, including for on-site sewage disposal systems.

Administration and enforcement. DEP's Bureau of Water Protection and Land Reuse has primary responsibility for enforcing the UIC rules in Connecticut.

DEP's Subsurface Sewage Disposal Program regulates conventional subsurface sewage treatment and disposal systems with design flows greater than 5,000 gallons (gal) per day (including sites where multiple smaller systems on a single lot have a combined flow greater than 5,000 ...

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State Requirements

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Connecticut Underground Injection Wells Resources

Underground Injection Wells Products

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