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Search plants, projects, owners, and states
72.8 MW Conventional Hydroelectric (2 MW) + Onshore Wind Turbine (1 MW) + Other Waste Biomass (18 MW) + Petroleum Liquids (52 MW) + Solar Photovoltaic (0 MW) operating in Suffolk, MA — ISO New England Inc.
72.8 MW
Nameplate Capacity
8
Generators
units
Hybrid (5)
Technology
Conventional Hydroelectric + Onshore Wind Turbine + Other Waste Biomass + Petroleum Liquids + Solar Photovoltaic
1995
Operating Since
Coordinates
42.3533, -70.9628
County
Suffolk, MA
Nearby Plants
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Massachusetts Wtr Rauth-Deer I | Massachusetts Water Resources Authority | — |
| Owner(s) | Massachusetts Wtr Rauth-Deer I | Massachusetts Water Resources Authority | — |
| Status | Operating | operating | — |
The Deer Island Treatment Plant is a 72.8 MW hybrid power plant located in Suffolk County, Massachusetts. It began operating in 1995 and is owned and operated by the Massachusetts Water Resources Authority (EIA operator: Massachusetts Wtr Rauth-Deer I). The plant utilizes a diverse set of technologies including conventional hydroelectric, onshore wind turbine, other waste biomass, petroleum liquids, and solar photovoltaic. The primary fuel source is distillate fuel oil (DFO). The plant is within the ISO New England Inc. balancing authority and the NPCC NERC region.
The Deer Island Treatment Plant's latest annual generation was 33,356 MWh, resulting in a capacity factor of 5.2%. The plant is ranked 4th out of 17 similar facilities in Massachusetts and 77th out of 886 nationally. The solar photovoltaic component uses a fixed tilt tracking system. The onshore wind turbine has a hub height of 34.5 meters and a rotor diameter of 47 meters. The wind turbine manufacturer is RRB, and the model is PS-600.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
ISO New England Inc. (ISNE)
Grid Voltage
14.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Political Subdivision
Sector
Commercial CHP
3.4K MWh
Latest Month
33.4K MWh
Annual Generation
5.2%
Capacity Factor
CO₂ Intensity
0 lb/MWh
NOx
0.096 lb/MWh
SO₂
0.005 lb/MWh
CH₄
0.014 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
5.6%
Annual Net Gen
35 GWh
CO₂eq
0.807 lb/MWh
Subregion
NPCC New England
2013
$765/kW
Est. Construction Cost
Total estimated cost: $55.7M
Point of Interconnection
Nearest Substation
Deer Island Substation · 115 kV
Substation Distance
0.457 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
LD.DEER_ISL115
Pricing Hub
.H.INTERNAL_HUB
Location Type
NETWORK NODE
Node Source
Curated node match
Last updated 2026-03-26
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