COUNTY WATER-SYSTEM LEDGER
Yellowstone, Montana
EPA’s September 2026 export lists 4 active community water systems serving Yellowstone, Montana, 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 Yellowstone, Montana
EPA associates 4 covered systems with Yellowstone, Montana; their reported population-served values total 138,239 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 |
|---|---|---|---|
| Billings City OfMT0000153 | 114,000 | Surface water | No current violation flagged |
| Billings Heights Co Water Dist OfMT0000155 | 12,000 | Surface water purchased | No current violation flagged |
| Laurel Municipal Water SystemMT0000270 | 6,339 | Surface water | No current violation flagged |
| Lockwood Water And Sewer DistrictMT0000156 | 5,900 | Surface water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Yellowstone, Montana
EPA classifies 4 systems serving Yellowstone, Montana across 2 primary-source categories; Surface water 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.