COUNTY WATER-SYSTEM LEDGER
Waukesha, Wisconsin
EPA’s September 2026 export lists 12 active community water systems serving Waukesha, Wisconsin, with 7 current-violation flags and 1 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Waukesha, Wisconsin
EPA associates 12 covered systems with Waukesha, Wisconsin; their reported population-served values total 227,917 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Waukesha Water UtilityWI2680238 | 70,718 | Surface water purchased | Other current violation flag |
| Brookfield Water UtilityWI2680253 | 29,070 | Ground water | Other current violation flag |
| New Berlin Water UtilityWI2680217 | 27,899 | Surface water purchased | No current violation flagged |
| Menomonee Falls Ww - Surface WaterWI2680082 | 23,867 | Surface water purchased | No current violation flagged |
| Oconomowoc WaterworksWI2680227 | 15,805 | Ground water | No current violation flagged |
| Sussex Village Hall & Water UtilityWI2680233 | 11,750 | Ground water | Other current violation flag |
| Hartland WaterworksWI2680205 | 9,212 | Ground water | No current violation flagged |
| Pewaukee City Water And Sewer UtilityWI2680214 | 8,671 | Ground water | Other current violation flag |
| Mukwonago WaterworksWI2680209 | 8,190 | Ground water | Other current violation flag |
| Pewaukee Village WaterworksWI2680229 | 8,166 | Ground water | Current serious-violator flag |
| Muskego Water UtilityWI2681741 | 8,150 | Ground water | Other current violation flag |
| Town Of Brookfield San Dist 4WI2680239 | 6,419 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Waukesha, Wisconsin
EPA classifies 12 systems serving Waukesha, Wisconsin across 2 primary-source categories; Surface water purchased is the largest category with 3 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.