Tap Truth EPA drinking water records, in plain English

County drinking water records

Lewis and Clark County, MT drinking water systems

46 community water systems serve Lewis and Clark County, MT, reporting 45,386 people served in all.

12 of them (26%) had at least one health-based violation in the last 10 years. 4 systems still have one unresolved.

43 rely mainly on groundwater and 3 on surface water, counting water bought from other systems.

44 systems filed a lead service line inventory listing 1 lead line, 155 galvanized lines that must be replaced and 511 lines of unknown material.

10 more systems are placed in Lewis and Clark County, MT by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
46
People served, sum of each system's own figure
45,386
Systems with a health-based violation, last 10 years
12
Systems with one unresolved
4
Lead service lines in inventories
1

Water systems serving Lewis and Clark County

46 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Helena Water System Helena, Helena Valley Southeast and 2 more 32,091 Surface water 3 0 0
City of East Helena East Helena and Helena 2,114 Groundwater 1 0 1
Eastgate Village Sewer and Water Helena Valley Southeast and East Helena 2,000 Groundwater 0 0 0
Helena Leisure LLC Helena Valley Southeast and Helena 1,200 Groundwater 0 0 0
Ten Mile and Pleasant Valley WUA Helena Valley West Central and Helena 750 Groundwater 1 1 0
North Star PUD Helena Valley Northwest and Helena 715 Groundwater 0 0 0
McHugh Mobile Home Park Helena 490 Groundwater 0 1 0
Treasure State Acres WUA Helena Valley West Central and Helena 483 Groundwater 0 0 0
La Casa Grande Water and Sewer District Helena Valley Southeast and Helena 404 Groundwater 0 1 0
Skyview Water and Sewer Utility Helena Valley Northwest and Helena 400 Groundwater 2 0 0
Golden Estates Homeowners Association Helena Valley West Central and Helena 400 Groundwater 0 0 0
Mobile City Home Park No 2 Helena West Side and Helena 300 Groundwater 0 0 0
Helena RV and Mobile Home Park Helena Valley West Central and Helena 250 Groundwater 0 0 0
Ranchview Estates WUA Helena Valley Northwest and Helena 250 Groundwater 0 0 0
Grass Land Estates Helena Valley Northeast and Helena 228 Groundwater 0 0 0
Golden Estates Trailer Court Helena 225 Groundwater 3 0 0
Holmberg Village Estates Helena Valley Southeast and Helena 225 Groundwater 1 0 No inventory
Glacier Point Ho and WUA Helena Valley West Central and Helena 210 Groundwater 1 0 No inventory
Bridge Creek Estates Subdivision Helena Valley Northwest and Helena 205 Groundwater 0 0 0
Pele Park Helena Valley Southeast and East Helena 186 Groundwater 0 0 0
Davis Meadow Village Helena Valley Southeast and East Helena 180 Groundwater 0 0 0
Town View Estates WUA Inc Helena Valley Northwest and Helena 175 Groundwater 0 0 0
Mountain Heritage Water System Helena Valley Northeast and East Helena 175 Groundwater 0 0 0
Prairie Mobile Village Helena Valley Southeast and Helena 163 Groundwater 0 0 0
Pebble Gardens Mobile Home CT Helena Valley West Central and Helena 125 Groundwater 0 0 0
Homestead Valley WUA Hvha Helena Valley Southeast and Helena 105 Groundwater 0 0 0
Mobile City Home Park No 1 Helena 100 Groundwater 0 0 0
Bryant No 3 Subdivision Helena Valley West Central and Helena 100 Groundwater 0 0 0
North Forestvale Homeowners Helena and land outside it 98 Groundwater 0 0 0
Camelot HOA Marysville and Helena 96 Groundwater 0 0 0
Buzz Inn Helena Valley Southeast and East Helena 95 Groundwater 0 0 0
Applegate Village Helena Valley West Central and Helena 85 Groundwater 0 0 0
Elk Creek Colony Augusta 84 Groundwater 7 1 0
Ruger Water District Helena Valley Southeast and Helena 79 Groundwater 0 0 0
McDonald Trailer CT Helena Valley Southeast and East Helena 75 Groundwater 1 0 0
Barnett Water Users System Helena Valley West Central and Helena 70 Groundwater 0 0 0
Wolf Creek Water System Wolf Creek 65 Purchased surface water 1 0 0
Blue Cloud Subdivision Helena West Side and Helena 60 Groundwater 5 0 0
Beacon Trailer Court Helena Helena Valley Southeast and Helena 55 Groundwater 0 0 0
Grand Valley Estates Subdivision Helena Valley Northwest and Helena 50 Groundwater 0 0 0
Moonlight Estates HOA Helena Valley West Central and Helena 44 Groundwater 0 0 0
Broadwater Estates HOA Helena West Side and Helena 40 Groundwater 5 0 0
Mobile City 3 Helena 40 Purchased surface water 0 0 0
Phoenix Park Helena Valley Southeast and East Helena 36 Groundwater 0 0 0
Trails End TR Park Helena Helena Valley West Central and Helena 35 Groundwater 0 0 0
Rosemarys Addition Helena Valley West Central and Helena 30 Groundwater 0 0 0

Systems placed by county record in Lewis and Clark County

10 systems

EPA has no service area map for these systems. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
VA Medical Center Helena County on record 1,275 Purchased surface water 0 0 0
Camel Mountain HOA County on record 96 Groundwater 0 0 0
Masonic Home of Montana County on record 90 Groundwater 0 0 0
Park Evergreen Trailer Court County on record 87 Groundwater 0 0 0
South Forestvale HOA County on record 82 Groundwater 0 0 0
Dakota Valley Mobile Home Park County on record 75 Groundwater 0 0 0
Milford Colony Inc County on record 67 Groundwater 5 0 0
Helena North KOA County on record 50 Groundwater 0 0 0
Bahny Brae Subdivision County on record 35 Groundwater 1 2 0
Western Skies Mobile CT County on record 25 Groundwater 0 0 0

Cities and towns in Lewis and Clark County

11 places

Back to Montana

Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations