Water Quality: Oconomowoc, WI
9 water systems • 16,666 people served
Some ConcernsWater Quality Summary
Oconomowoc is served by 9 public water systems with a combined service population of 16,666 people, and has 41 EPA Safe Drinking Water Act violations on record. Critically, 1 of those are health-based violation, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Oconomowoc's violation count is 25% above the national average for Wisconsin. Contaminants associated with violations include Stage 2 DBP.
Contaminants Found
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Water Systems Serving Oconomowoc
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| OCONOMOWOC WATERWORKS | WI2680227 | Groundwater | 15,805 | 6 |
| SUNNYFIELD ACRES | WI2680225 | Groundwater | 300 | 5 |
| GENESEE LAKE SCHOOL SOUTH | WI2683331 | Groundwater | 230 | 5 |
| GENESEE LAKE SCHOOL NORTH | WI2680806 | Groundwater | 110 | 5 |
| STANTON PLACE I | WI1281122 | Groundwater | 66 | 1 |
| CAMBRIDGE PLACE OF DELAFIELD | WI2686325 | Groundwater | 50 | 5 |
| PRESTON PINES | WI7010114 | Groundwater | 38 | 10 |
| MUSKEGO LAKE AIRE APARTMENTS | WI2680218 | Groundwater | 35 | 1 |
| STANTON PLACE II | WI1281162 | Groundwater | 32 | 3 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Wisconsin
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.