Tap Truth EPA drinking water records, in plain English

County drinking water records

Jefferson County, MT drinking water systems

12 community water systems serve Jefferson County, MT, reporting 5,263 people served in all.

4 of them (33%) had at least one health-based violation in the last 10 years. 2 systems still have one unresolved.

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

11 systems filed a lead service line inventory listing 0 lead lines, 1 galvanized line that must be replaced and 418 lines of unknown material.

2 more systems are placed in Jefferson 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
12
People served, sum of each system's own figure
5,263
Systems with a health-based violation, last 10 years
4
Systems with one unresolved
2
Lead service lines in inventories
0

Water systems serving Jefferson County

12 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
Town of Whitehall Whitehall 1,500 Groundwater 53 0 0
City of Boulder Boulder 1,400 Groundwater 1 0 0
Jefferson Hills WUA Montana City 780 Groundwater 1 1 0
Saddle Mountain Corp Clancy Montana City and Clancy 350 Groundwater 0 0 No inventory
Forest Park Water Users Association Clancy 323 Groundwater 0 0 0
Blue Sky Heights WUA Clancy Clancy 250 Groundwater 0 1 0
Basin County Water and Sewer Dist Basin 200 Groundwater 1 0 0
Hangmans Tree WUA Clancy and Montana City 158 Groundwater 0 0 0
Stoney Brook Village Condominium Assoc Montana City and Clancy 142 Groundwater 0 0 0
Jefferson Tracts Assoc Inc Montana City and Clancy 80 Groundwater 0 0 0
Sunnybrook Acres HOA Montana City 50 Groundwater 0 0 0
Rocky Mountain WUA Jefferson City and Clancy 30 Groundwater 0 0 0

Systems placed by county record in Jefferson County

2 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
Elkhorn Health and Rehabilitation LLC County on record 89 Groundwater 0 2 0
Red Cliff Estates HOA County on record 48 Groundwater 0 0 0

Cities and towns in Jefferson County

6 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