CITY WATER-SYSTEM LEDGER
Madison, Wisconsin
EPA’s September 2026 export lists 2 active community water systems serving Madison, Wisconsin, with 2 current-violation flags and 0 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 Madison, Wisconsin
EPA associates 2 covered systems with Madison, Wisconsin; their reported population-served values total 274,787 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 |
|---|---|---|---|
| Madison Water UtilityWI1130224 | 272,000 | Ground water | Other current violation flag |
| Mendota Mental Health InstWI1130235 | 2,787 | Ground water | Other current violation flag |
02 / SOURCE MIX
Primary water sources for Madison, Wisconsin
EPA classifies 2 systems serving Madison, Wisconsin across 1 primary-source categories; Ground water is the largest category with 2 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.