COUNTY WATER-SYSTEM LEDGER
Columbia, Wisconsin
EPA’s September 2026 export lists 5 active community water systems serving Columbia, 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 Columbia, Wisconsin
EPA associates 5 covered systems with Columbia, Wisconsin; their reported population-served values total 24,508 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 |
|---|---|---|---|
| Portage WaterworksWI1110039 | 10,437 | Ground water | No current violation flagged |
| Columbus UtilitiesWI1110038 | 5,173 | Ground water | Other current violation flag |
| Wisconsin Dells WaterworksWI1110113 | 3,232 | Ground water | No current violation flagged |
| Lodi WaterworksWI1110100 | 3,146 | Ground water | Other current violation flag |
| Poynette WaterworksWI1110037 | 2,520 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Columbia, Wisconsin
EPA classifies 5 systems serving Columbia, Wisconsin across 1 primary-source categories; Ground water is the largest category with 5 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.