COUNTY WATER-SYSTEM LEDGER
Day, South Dakota
EPA’s September 2026 export lists 2 active community water systems serving Day, South Dakota, with 0 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 Day, South Dakota
EPA associates 2 covered systems with Day, South Dakota; their reported population-served values total 26,423 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 |
|---|---|---|---|
| Web Water Development AssociationSD4601089 | 20,750 | Surface water | No current violation flagged |
| Brown-Day-Marshall RwsSD4600882 | 5,673 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Day, South Dakota
EPA classifies 2 systems serving Day, South Dakota across 2 primary-source categories; Surface water is the largest category with 1 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.