Tap Truth EPA drinking water records, in plain English

County drinking water records

Madison County, MT drinking water systems

7 community water systems serve Madison County, MT, reporting 8,538 people served in all. A system that also serves other counties counts all of its customers here.

2 of them had at least one health-based violation in the last 10 years. None of those systems has one still unresolved.

7 rely mainly on groundwater, counting water bought from other systems.

Their lead service line inventories list 0 lead lines, 94 galvanized lines that must be replaced and 968 lines of unknown material.

5 more systems are placed in Madison 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
7
People served, sum of each system's own figure
8,538
Systems with a health-based violation, last 10 years
2
Systems with one unresolved
0
Lead service lines in inventories
0

Water systems serving Madison County

7 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
Big Sky County Water and Sewer Dist 363 Big Sky 4,132 Groundwater 0 0 0
Virginia City Water Dept Virginia City 1,500 Groundwater 5 0 0
Town of Ennis Ennis 1,400 Groundwater 0 0 0
Town of Sheridan Sheridan 632 Groundwater 0 0 0
Town of Twin Bridges Twin Bridges 424 Groundwater 0 0 0
Lower Pioneer Mountain Water System Big Sky and land outside it 350 Groundwater 1 0 0
Encampment Trail Big Sky and land outside it 100 Groundwater 0 0 0

Systems placed by county record in Madison County

5 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
Andesite Ridge Water System County on record 450 Purchased groundwater 0 0 0
Mt Moonlight Basin County on record 355 Groundwater 0 0 0
Valley Garden Golf Village HOA County on record 195 Groundwater 0 0 0
Spanish Peaks Mountain Club County on record 40 Groundwater 0 0 0
Lone View Ridge Water System County on record 37 Groundwater 0 0 0

Cities and towns in Madison County

4 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