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Connecticut Department of Energy and Environmental Protection

  • Connecticut’s regulatory authority on energy and environmental issues
  • Oversees programs designed to protect the state’s environmental resources and improve access to cheaper and more efficient energy
  • Financing available for improvements that meet environmental or energy goals


Created in 2011 through a merger of Connecticut’s Department of Environmental Protection and Department of Public Utility Control, as well as energy staff from elsewhere in the state government, the Department of Energy and Environmental Protection is responsible for protecting Connecticut’s environmental resources, improving access to cleaner and cheaper energy for homeowners and businesses, and fostering the sustainable development of the state’s economy.

DEEP is divided into three main branches: an Energy Branch to review utility rates and develop programs for energy efficiency and infrastructure; an Environmental Quality Branch to protect air, land, and water resources; and an Environmental Conservation Branch to manage natural resources and open space. In addition, DEEP’s Office of the Commissioner offers assistance on a variety of services including policy, engineering, field support, and program development.

Who’s it for?

Businesses looking to improve their energy efficiency or find assistance on any environmental issues.


Conserving, improving and protecting the natural resources and the environment of the state of Connecticut as well as making cheaper, cleaner and more reliable energy available for the people and businesses of the state. The agency is also committed to playing a positive role in rebuilding Connecticut’s economy and creating jobs – and to fostering a sustainable and prosperous economic future for the state.

Resources & Services

Financial Assistance

DEEP offers grants, loans, and tax incentives for projects involving environmental issues such as site cleanup, waste management, open space, habitat management or restoration, and forestry.

Permits and Licensing

DEEP provides information and assistance on any necessary permits and licensing affecting a business, including emissions, water discharges, and waste management. The department also seeks to offer an innovative and flexible approach to small businesses by providing regulatory and technical assistance on environmental issues.

Energy Programs

DEEP administers some energy efficiency programs, such as the Weatherization Assistance Program and the State Buildings Program, while also providing resources to businesses on how they can improve their energy efficiency, find rebates, or otherwise realize savings on their utilities.


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