Deer Island Treatment Plant
Other power plant · Suffolk County, Massachusetts
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- Massachusetts Wtr Rauth-Deer I
- County
- Suffolk County
- Generating units
- 8
- Share of state capacity
- 0.52%
- Rank among other plants in Massachusetts
- #5 of 25
- EIA plant code
- 10823
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| G101 | Petroleum Liquids | 26 MW | 22 MW | 1995 | Standby/Backup: available for service but not normally used |
| G201 | Petroleum Liquids | 26 MW | 22 MW | 1995 | Standby/Backup: available for service but not normally used |
| S101 | Other Waste Biomass | 18 MW | 9.0 MW | 1998 | Operating |
| H101 | Conventional Hydroelectric | 1.0 MW | 1.0 MW | 2001 | Operating |
| H201 | Conventional Hydroelectric | 1.0 MW | 1.0 MW | 2001 | Operating |
| WT101 | Onshore Wind Turbine | 0.6 MW | 0.6 MW | 2009 | Operating |
| WT102 | Onshore Wind Turbine | 0.6 MW | 0.6 MW | 2009 | Operating |
| PV101 | Solar Photovoltaic | 0.1 MW | 0.1 MW | 2008 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Massachusetts
| Dartmouth Power Associates LP | Natural gas | 97 MW |
| Medical Area Total Energy Plant | Natural gas | 95 MW |
| M Street Jet | Other | 69 MW |
| MMWEC Simple Cycle Gas Turbine | Natural gas | 65 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 73 MW solar plant and a 73 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Massachusetts power plants · What Massachusetts actually generates