Where is Wallingford Energy?

In New Haven County, Connecticut (CT). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is Wallingford Energy?

350 MW of nameplate capacity across 7 units, as of the EIA-860M release for 2026-07.

Who owns Wallingford Energy?

EIA-860M names Wallingford Energy LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Wallingford Energy LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Wallingford Energy LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Wallingford Energy LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Wallingford Energy still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Wallingford Energy

Wallingford Energy is a 350 MW natural gas power plant in New Haven County, Connecticut, operated by Wallingford Energy LLC. EIA-860M lists 7 generating units here, inside ISO New England. Its units entered service between 2001 and 2018.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 350 MW; 318 MW net summer
Generating units: 7
In service: 2001–2018
EIA plant ID: 55517

Where it is

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County: New Haven County, Connecticut
Coordinates: 41.4487, -72.8354
Balancing authority: ISNE
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Wallingford Energy LLC
Primary energy source: Natural gas
Technologies: Natural Gas Fired Combustion Turbine
Status: Operating

Every plant Wallingford Energy LLC reports to EIA →

Wallingford Energy: FAQ

Where is Wallingford Energy?: In New Haven County, Connecticut (CT). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Wallingford Energy?: 350 MW of nameplate capacity across 7 units, as of the EIA-860M release for 2026-07.
Who owns Wallingford Energy?: EIA-860M names Wallingford Energy LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Wallingford Energy LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Wallingford Energy LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Wallingford Energy LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Wallingford Energy still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.