MMSD Jones Island Wastewater
Natural gas power plant · Milwaukee County, Wisconsin
Nameplate capacity
31 MW
Rank in Wisconsin
#76
of 278 plants
In service since
1971
January 1971
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combustion Turbine
- Operator
- Milwaukee Metro Sewerage Dist
- County
- Milwaukee County
- Generating units
- 4
- Share of state capacity
- 0.16%
- Rank among natural gas plants in Wisconsin
- #32 of 41
- EIA plant code
- 54851
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combustion Turbine | 18 MW | 13 MW | 1971 | Operating |
| SOL1 | Natural Gas Fired Combustion Turbine | 4.6 MW | 4.6 MW | 2013 | Operating |
| SOL2 | Landfill Gas | 4.6 MW | 4.6 MW | 2013 | Operating |
| SOL3 | Landfill Gas | 4.6 MW | 4.6 MW | 2013 | 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 Wisconsin
| Holcombe | Hydro | 34 MW |
| Prairie Du Sac | Hydro | 33 MW |
| Montfort Wind Energy Center | Wind | 30 MW |
| Custer Energy Center | Natural gas | 25 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 31 MW solar plant and a 31 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 Wisconsin power plants · What Wisconsin actually generates