MMSD South Shore Wastewater
Biomass power plant in Milwaukee County, Wisconsin. 5.1 MW of nameplate capacity across 5 generators, operated by Milwaukee Metro Sewerage Dist.
Also known as EIA plant 55525
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 5.1 MWNameplate
- Generators
- 5 operatingEIA-860M, August 2026
- Operating since
- August 2000First generator online
- Operator
- Milwaukee Metro Sewerage DistEIA operator ID 12619
- Grid
- MISOBalancing authority MISO
- Price nodes
- None linkedNo verified ISO node
- Location
- Milwaukee County, WI42.8869, −87.8422
- EIA plant ID
- 55525EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power MMSD South Shore Wastewater produces
Free · EIA-923Net generation, 2025
23.0 GWh
23,046 MWh, final
Capacity factor, 2025
51.6%
2024: 58.8%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
17.7–33.9
GWh a year. Low 2015, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 3,626 | Not reported | 12 of 12 |
| 2002 | 5,479 | Not reported | 12 of 12 |
| 2003 | 2,524 | Not reported | 12 of 12 |
| 2004 | 3,303 | Not reported | 12 of 12 |
| 2005 | 4,242 | Not reported | 12 of 12 |
| 2006 | 1,680 | Not reported | 12 of 12 |
| 2007 | 3,159 | Not reported | 12 of 12 |
| 2008 | 146 | Not reported | 12 of 12 |
| 2009 | 7,391 | Not reported | 12 of 12 |
| 2010 | 12,664 | Not reported | 12 of 12 |
| 2011 | 6,507 | 14.6% | 12 of 12 |
| 2012 | 13,338 | 29.8% | 12 of 12 |
| 2013 | 13,632 | 30.5% | 12 of 12 |
| 2014 | 14,820 | 33.2% | 12 of 12 |
| 2015 | 17,745 | 39.7% | 12 of 12 |
| 2016 | 29,848 | 66.6% | 12 of 12 |
| 2017 | 30,048 | 67.3% | 12 of 12 |
| 2018 | 30,083 | 67.3% | 12 of 12 |
| 2019 | 24,511 | 54.9% | 12 of 12 |
| 2020 | 24,827 | 55.4% | 12 of 12 |
| 2021 | 33,911 | 75.9% | 12 of 12 |
| 2022 | 31,057 | 69.5% | 12 of 12 |
| 2023 | 30,181 | 67.6% | 12 of 12 |
| 2024 | 26,345 | 58.8% | 12 of 12 |
| 2025 | 23,046 | 51.6% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Other Waste Biomass | 1.5 | August 2000 |
| 1CAT | Other Waste Biomass | 0.9 | February 2009 |
| 2CAT | Other Waste Biomass | 0.9 | January 2010 |
| 3CAT | Other Waste Biomass | 0.9 | January 2009 |
| 4CAT | Other Waste Biomass | 0.9 | January 2009 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Milwaukee Metro Sewerage Dist as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near MMSD South Shore Wastewater
More plants operated by Milwaukee Metro Sewerage Dist
Questions about MMSD South Shore Wastewater
How much power does MMSD South Shore Wastewater produce?
MMSD South Shore Wastewater reported 23,046 MWh (23.0 GWh) of net generation in 2025, a 51.6% capacity factor on 5.1 MW of nameplate capacity.
Where is MMSD South Shore Wastewater?
MMSD South Shore Wastewater is in Milwaukee County, Wisconsin, at 42.8869, −87.8422. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates MMSD South Shore Wastewater?
EIA-860M for August 2026 lists Milwaukee Metro Sewerage Dist as the operator (EIA operator ID 12619). The operator is not always the owner.
When did MMSD South Shore Wastewater start operating?
Its first generator began operating in August 2000, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page