Power plants in Connecticut are not run by one agency. Generating stations, cogeneration units, fuel cells, solar arrays and hydroelectric dams belong to private companies, manufacturers, universities and a few municipal and cooperative utilities. State and federal regulators oversee them. This page explains who does what, so you can work out whom to contact about a plant near you.

Our database lists 140 plants across the state, from harbor-side stations in Bridgeport and New Haven to a single campus generator in New Britain. Most are industrial sites, not public counters. Gate staff rarely handle walk-in requests, so your first step is usually a phone call, an email or a filing with the right regulator.

How Connecticut Splits Generation, Delivery and Oversight

Connecticut is part of the New England grid, which is run by ISO New England. The grid operator does not own plants. It directs which ones run, and it manages the wholesale market where generators sell their output. A plant in Montville and one in Milford compete in the same regional market.

The wires, poles and meters at your home belong to a different company. Eversource serves most of the state, and United Illuminating serves the greater New Haven and Bridgeport area. A handful of towns run their own municipal systems, including Norwich Public Utilities, Groton Utilities and the Wallingford Electric Division. If your lights go out, the utility is who you call, not the plant.

That split dates to Connecticut's electric restructuring law of the late 1990s. Utilities were pushed to sell most of their generating plants, and competitive companies took them over. Since 2000, customers have been able to choose an electricity supplier. Your delivery service, outage response and wires stay with the local utility either way.

The Conn Mun Electric Energy Coop listing in Norwich represents a third model. Municipal utilities pool their power purchasing through the Connecticut Municipal Electric Energy Cooperative, so small towns can buy at a larger scale. It is a joint agency, not a plant you can tour.

Plant types vary a great deal. The list includes gas-fired stations, waste-to-energy facilities, paper mill power plants, hydroelectric dams, fuel cells and solar fields. Each type has different owners, different permits and a different contact for questions, so identify the type before you pick up the phone.

Where Power Plants Cluster Across Connecticut's Regions

Plants follow water, fuel and transmission lines. Rivers supplied early hydropower and cooling water, and harbors made fuel deliveries easy. That is why the densest clusters sit on the shoreline and along the major rivers, while the hills in between have fewer sites.

Connecticut abolished county government in 1960, so the eight counties are geographic groupings only. Approvals come from towns, regional planning councils and the state. We still group listings by county because it is a practical way to browse.

Southeastern Connecticut and the Thames River Valley

New London County has the most listings of any county, led by Norwich, Groton, Montville and Lisbon. Here you will find Covanta Southeastern Connecticut Company at 40 School Street in Groton, the Fort Hill 1, 2, 3 & 4 units on Fort Hill Drive in Montville, and Fusion Paperboard Power Plant on Inland Road in Lisbon. The county is also home to the Millstone nuclear station in Waterford, which answers to the federal Nuclear Regulatory Commission as well as state agencies.

Hartford, the Connecticut River and Central Connecticut

Hartford County mixes downtown energy systems with industrial and campus plants. Capitol District Energy Center at 490 Capitol Avenue sits in the city core of Hartford. Cellu Tissue in East Hartford and the Ccsu Co-Gen-Stby Gen unit at Central Connecticut State University in New Britain provide on-site power for a mill and a campus. Bullock Road Solar 1 in Bristol shows the newer solar side of the list. Down the river, Middlesex County has the Middletown station on River Road.

The Coast From New Haven to Greenwich

Along Long Island Sound, New Haven County lists New Haven Harbor on Waterfront Street, Milford Power Project on Shelland Street, A L Pierce in Wallingford and a Branford site. In Fairfield County you will find Bridgeport Station on Atlantic Street, Nrg Norwalk Harbor on Manresa Island Road, Cos Cob in Greenwich and Trs Fuel Cell in Danbury. Ibm Southbury is a corporate site in the inland part of New Haven County.

The Northwest Hills and the Quiet Corner

Litchfield County is where river hydropower shows up. Bulls Bridge in New Milford and Falls Village in Canaan are both on the Housatonic River, and Franklin Drive in Torrington is listed there too. In the northeast, Windham County includes Killingly Energy Center on Lake Road. These areas have fewer plants, but each one is a bigger presence in a small town.

Who Regulates Power Plants in Connecticut

Several bodies share the job. Knowing which one handles your issue saves weeks of phone tag.

Local officials still matter. Town building and fire officials handle inspections, fire safety and emergency planning, and towns take part in Siting Council hearings on projects within their borders.

How to Use Connecticut Power Plant Listings Effectively

Start with the listing, then decide which kind of question you have. A noise, odor or emissions concern is an environmental matter, so DEEP is the first stop. A billing or outage problem belongs to your utility and then PURA. A question about a proposed plant goes to the Siting Council docket and your town hall.

Have details ready before you call. Note the plant name and address, the date and time of the issue, and what you saw, heard or smelled. Photos and video help. Phone numbers appear on many of our listings, such as 860-293-1990 for Capitol District Energy Center in Hartford, but some entries have none. Where that is the case, go through the town or the regulator.

Timing also matters. Plants run around the clock, but business offices keep weekday hours, so plan calls for the daytime. Use 911 for fires, downed wires or any immediate danger. Jobs, tours and contracts are normally handled by the owner's corporate office, not the plant gate.

Finally, check that the listing fits your need. Some entries are generating units, some are cogeneration systems at schools or factories, and a few are cooperatives or district energy providers. The questions below cover the issues that come up most often.

Power plant facilities in Connecticut include a mix of federal, state, and municipally owned generation assets that contribute to the region's overall electricity supply. Connecticut's energy mix and the number of publicly owned facilities reflect the state's natural resources, regulatory environment, and historical development of its utility infrastructure.

Power Plant locations are available in 62 cities across Connecticut. They are spread across 8 counties.

Areas with the highest concentration of power plant locations include Hartford, Norwich, Groton, often reflecting proximity to water resources, fuel supply infrastructure, or industrial demand centers.

Residents of Connecticut who are customers of a municipal or public power utility can contact their local power authority for billing assistance, energy efficiency programs, and information about planned outages or infrastructure upgrades in their service area.

Power Plant by Counties

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Residents of Connecticut who receive electricity service from a publicly owned utility can visit or contact that utility's customer service office to learn about outage reporting, billing options, and energy assistance programs. For information about a specific power generation facility in Connecticut, contacting the state's public utility commission is often the best starting point.

Browse Power Plant by county across Connecticut to find the nearest location.

Practical Notes for Power Plant Issues in Connecticut Towns

Connecticut is small, but its energy map is uneven. The shoreline and river valleys carry most of the generation, while Tolland County has just three listings and Middlesex County has five. If you live in one of those quieter counties, the nearest plant may be one town over, so check neighboring towns on the list.

Keep a simple routine. Identify the plant by name and town, find the owner, and then choose the right body. The utility handles service, DEEP handles environmental concerns, PURA handles rate and service disputes, and the Siting Council handles new projects. Town officials can point you to local hearings and meeting calendars. Save emails and reference numbers, because regulators ask for them.

Listings change as plants retire, sell or convert to new fuels. Confirm details by phone before you travel anywhere, and treat any address as a mailing or business location, not an invitation to visit.

Three bodies do most of the work. The Department of Energy and Environmental Protection issues air emission, water discharge and waste permits, and it sets state energy policy. The Public Utilities Regulatory Authority, which sits within that department, handles utility rates, service standards and electricity supplier licensing. The Connecticut Siting Council reviews applications for new generating facilities and issues a certificate before construction begins. Federal agencies add another layer: the Federal Energy Regulatory Commission covers wholesale power and hydro licensing, and the Nuclear Regulatory Commission covers Millstone in Waterford. Which agency you contact depends on whether your issue is environmental, billing-related or about a new project.

Call your electric utility, not the plant. Most Connecticut customers are served by Eversource or United Illuminating, and a few towns have municipal systems, such as Norwich Public Utilities, Groton Utilities and the Wallingford Electric Division. Your bill shows which company delivers your power, and that company runs the outage line and the repair crews. Stay well back from downed wires and call 911 if you see one. If an outage lasts for days and you believe the response was poor, PURA reviews utility storm performance and accepts complaints. Stations such as Bridgeport Station or Milford Power Project do not handle customer outages.

Usually not without arrangements. Sites such as the Fort Hill units in Montville or Bridgeport Station are secure industrial facilities, and nuclear and large fossil plants have strict access rules. Some owners offer scheduled education visits for schools or community groups, which you set up through the company's community relations or corporate office. Campus units like the cogeneration plant at Central Connecticut State University in New Britain are best approached through the university's facilities department. Do not simply show up at a gate. Call ahead, ask who handles visits, and expect photo ID and safety rules if a visit is approved.

Start with the company and ask for a reference number for your complaint. If the problem is not resolved, you can file with PURA, which reviews disputes with utilities and licensed electric suppliers. The Office of Consumer Counsel speaks for ratepayers in rate cases but does not settle individual bills. Keep your bills, your supplier contract and any emails. Connecticut customers may choose a competitive supplier, but the utility still delivers the power, so work out whether the problem is the supplier's price or the utility's delivery charges. Ask PURA or your utility about current seasonal shutoff protections if you face hardship.

Larger projects need a certificate of environmental compatibility and public need from the Connecticut Siting Council, which holds public hearings and weighs environmental effects. DEEP separately issues air and water permits. The council process is open to the public: towns, groups and neighbors can ask to take part, and anyone can submit written comments. Smaller projects, such as some rooftop and modest solar systems, follow lighter rules and may need only local approval and a utility interconnection review. Check with your town planning office and the Siting Council's online docket before assuming a project is or is not under state review.

New London County has 41 listings against three in Tolland County. Coastal and river sites offer cooling water, harbor fuel deliveries and nearby transmission, which suit large stations. Norwich, Groton and Montville also host a municipal power cooperative, a waste-to-energy facility and several generating units. Tolland County is hillier and mostly residential and wooded, with little heavy industry, so fewer sites were built there. The count does not change your service, though. Customers in every county draw from the same ISO New England grid, and their local utility handles delivery, billing and outages.