MMSD JONES ISLAND WASTEWATER
OperatingNatural Gas power plant
- Capacity
- 35 MW
- Primary fuel
- Natural Gas
- County
- Milwaukee County
- Operator
- MILWAUKEE METRO SEWERAGE DIST
- Status
- Operating
- Commissioned
- 1971
- EIA plant ID
- 54851
- Coordinates
- 43.0218, -87.9020
MMSD JONES ISLAND WASTEWATER, a 35 MW Natural Gas power plant in Milwaukee County, Wisconsin. Operated by MILWAUKEE METRO SEWERAGE DIST, commissioned 1971.
Weather peril exposure
MMSD JONES ISLAND WASTEWATER is a 35 MW natural gas power plant in Milwaukee County, WI, operated by MILWAUKEE METRO SEWERAGE DIST, commissioned in 1971. Milwaukee County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.5 of 5 at the 12th national percentile. Winter weather is the leading peril, rated Very High by FEMA at the 42nd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Milwaukee County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Winter weather | Very High | 42nd | 2.7 of 5 | 15.8 |
| Tornado | Very High | 42nd | 2.7 of 5 | 0.40 |
| Heat wave | Relatively High | 40th | 2.6 of 5 | 3.1 |
| Riverine flooding | Relatively High | 28th | 2.1 of 5 | 2.1 |
| Hail | Relatively Moderate | 27th | 2.1 of 5 | 2.7 |
| Ice storm | Relatively Moderate | 25th | 2.0 of 5 | 0.47 |
| Lightning | Relatively Moderate | 25th | 2.0 of 5 | 33.7 |
| Earthquake | Relatively Low | 24th | 2.0 of 5 | <0.01 |
| Strong wind | Relatively High | 23rd | 1.9 of 5 | 3.1 |
| Wildfire | Very Low | 8th | 1.3 of 5 | <0.01 |
| Coastal flooding | Very Low | 7th | 1.3 of 5 | 0.01 |
| Hurricane | Very Low | 0th | 1.0 of 5 | <0.01 |
Model hail, wind and flood exposure for Milwaukee County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.