How many hydroelectric power plants are in New Jersey?

2, with 15 MW of nameplate capacity between them, spread over 1 county. That is the EIA-860M operating count for 2026-07.

Is there a map of New Jersey hydroelectric power plants?

Yes — the map above. Each dot is one hydroelectric power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.

Which is the largest hydroelectric power plant in New Jersey?

Great Falls Hydro Project, at 12 MW. The table is sorted largest first, so the rest follow it.

Is there a hydroelectric power plant near me in New Jersey?

The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.

Which grid operator runs New Jersey's hydroelectric power plants?

Most of them sit inside PJM, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.

How current is this, and what is left out?

EIA-860M for 2026-07. Conventional hydroelectric. Pumped storage is counted separately. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.

Hydroelectric Power Plants in New Jersey

Every operating hydroelectric power plant in New Jersey on EIA-860M for 2026-07: 2 plants, 7 generating units and 15 MW of nameplate capacity across 1 county, most of it inside PJM.

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

Plants: 2; 7 generating units
Nameplate capacity: 15 MW
Counties: 1
Grid operator: PJM; covers most of these plants

Map of hydroelectric power plants in New Jersey

Every one of the 2 plants is drawn at the coordinate EIA files for it.

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Hydro · 2

List of hydroelectric power plants in New Jersey

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

hydroelectric power plants in New Jersey

Great Falls Hydro ProjectConventional Hydroelectric	Eagle Creek Renewable Energy, LLC	Passaic	12.3	3	1985	Operating
Passaic Valley Water CommissionConventional Hydroelectric	Passaic Valley Water Comm	Passaic	2.4	4	1935	Out of service and NOT expected to return to service in next calendar year

Largest hydroelectric power plants in New Jersey

1Great Falls Hydro ProjectPassaic County, New Jersey12.3 MW
2Passaic Valley Water CommissionPassaic County, New Jersey2.4 MW

Hydroelectric power plants by county in New Jersey

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

County	Plants	Nameplate MW
Passaic	2	14.7

Hydroelectric Power Plants in New Jersey: FAQ

How many hydroelectric power plants are in New Jersey?: 2, with 15 MW of nameplate capacity between them, spread over 1 county. That is the EIA-860M operating count for 2026-07.
Is there a map of New Jersey hydroelectric power plants?: Yes — the map above. Each dot is one hydroelectric power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest hydroelectric power plant in New Jersey?: Great Falls Hydro Project, at 12 MW. The table is sorted largest first, so the rest follow it.
Is there a hydroelectric power plant near me in New Jersey?: The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs New Jersey's hydroelectric power plants?: Most of them sit inside PJM, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.
How current is this, and what is left out?: EIA-860M for 2026-07. Conventional hydroelectric. Pumped storage is counted separately. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.