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

2 GW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.

EIA-860M names Constellation Nuclear 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 Limerick LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Constellation Nuclear 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 "Limerick LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Limerick still running?

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

Limerick

Limerick is a 2 GW nuclear power plant in Montgomery County, Pennsylvania, operated by Constellation Nuclear. EIA-860M lists 2 generating units here, inside PJM. Its units entered service between 1986 and 1990.

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: 2,277 MW; 2,241.8 MW net summer
Generating units: 2
In service: 1986–1990
EIA plant ID: 6105

Where it is

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County: Montgomery County, Pennsylvania
Coordinates: 40.2243, -75.5874
Balancing authority: PJM
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Constellation Nuclear
Primary energy source: Nuclear
Technologies: Nuclear
Status: Operating

Every plant Constellation Nuclear reports to EIA →

Limerick: FAQ

Where is Limerick?: In Montgomery County, Pennsylvania (PA). 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 Limerick?: 2 GW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Limerick?: EIA-860M names Constellation Nuclear 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 Limerick LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Constellation Nuclear 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 "Limerick LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Limerick still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.