MMSD South Shore Wastewater
Milwaukee County, Wisconsin · EIA plant ID 55525 · Operator: Milwaukee Metro Sewerage Dist
Nameplate5MWSummer 5 MW
Generators5in service
Net generation23GWh12 mo to Dec 2025
Capacity factor47%other units, summer MW
Heat rate5,424Btu/kWhfossil units, electric fuel, HHV
First online2000
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), other units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 3.6 | 27.7% | 14,338 |
| 2002 | 5.5 | 44.0% | 10,143 |
| 2003 | 2.5 | 19.0% | 9,749 |
| 2004 | 3.3 | 25.3% | 9,618 |
| 2005 | 4.2 | 34.2% | 9,618 |
| 2006 | 1.7 | 13.6% | 9,619 |
| 2007 | 3.2 | 25.5% | 9,490 |
| 2008 | 0.1 | 1.2% | 10,638 |
| 2009 | 7.4 | 17.0% | 9,460 |
| 2010 | 12.7 | 17.3% | 9,906 |
| 2011 | 6.5 | 9.8% | 9,853 |
| 2012 | 13.3 | 20.9% | 9,611 |
| 2013 | 13.6 | 22.0% | 9,536 |
| 2014 | 14.8 | 32.5% | 9,578 |
| 2015 | 17.7 | 40.0% | 9,581 |
| 2016 | 29.8 | 48.1% | 5,308 |
| 2017 | 30 | 47.5% | 5,303 |
| 2018 | 30.1 | 38.3% | 5,302 |
| 2019 | 24.5 | 43.9% | 5,305 |
| 2020 | 24.8 | 47.5% | 5,315 |
| 2021 | 33.9 | 65.6% | 5,298 |
| 2022 | 31.1 | 61.2% | 5,280 |
| 2023 | 30.2 | 52.6% | 5,301 |
| 2024 | 26.3 | 53.2% | 5,349 |
| 2025 | 23 | 46.6% | 5,424 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Other Waste Biomass | IC | 1.5 | 1.4 | Aug 2000 | Operating | — | coming soon |
| 1CAT | Other Waste Biomass | IC | 0.9 | 0.9 | Feb 2009 | Operating | — | coming soon |
| 2CAT | Other Waste Biomass | IC | 0.9 | 0.9 | Jan 2010 | Operating | — | coming soon |
| 3CAT | Other Waste Biomass | IC | 0.9 | 0.9 | Jan 2009 | Operating | — | coming soon |
| 4CAT | Other Waste Biomass | IC | 0.9 | 0.9 | Jan 2009 | Operating | — | coming soon |
Owner / operator
Operator: Milwaukee Metro Sewerage Dist. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Milwaukee Metro Sewerage Dist | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| Elm Road Generating Station | 1,403 MW | 4.3 km |
| South Oak Creek | 642 MW | 4.7 km |
| City of Milwaukee- Airport Expansion | — | 6.1 km |
| City of Milwaukee Landfill | 2 MW | 6.5 km |
| ATI | 2 MW | 6.6 km |
| IKEA Oak Creek Rooftop PV System | 1 MW | 7.8 km |