Tap Truth EPA drinking water records, in plain English

County drinking water records

Jefferson County, WI drinking water systems

21 community water systems serve Jefferson County, WI, reporting 61,558 people served in all. A system that also serves other counties counts all of its customers here.

9 of them (43%) had at least one health-based violation in the last 10 years. 6 systems still have one unresolved.

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

Their lead service line inventories list 1,690 lead lines, 324 galvanized lines that must be replaced and 1,925 lines of unknown material.

7 more systems are placed in Jefferson County, WI 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
21
People served, sum of each system's own figure
61,558
Systems with a health-based violation, last 10 years
9
Systems with one unresolved
6
Lead service lines in inventories
1,690

Water systems serving Jefferson County

21 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
Watertown Waterworks Watertown 23,945 Groundwater 0 0 927
Fort Atkinson Waterworks Fort Atkinson 12,390 Groundwater 0 0 306
Jefferson Waterworks Jefferson 7,926 Groundwater 7 1 308
Lake Mills Waterworks Lake Mills 6,211 Groundwater 4 5 143
Waterloo Waterworks Waterloo 3,520 Groundwater 3 0 0
Johnson Creek Waterworks Johnson Creek 3,318 Groundwater 1 2 6
Palmyra Waterworks Palmyra 1,756 Groundwater 0 0 0
Autumn Ridge Water System LLC Ixonia 575 Groundwater 0 0 0
Spacious Acres Mobile Home Community Sullivan and land outside it 525 Groundwater 0 0 0
Tremain Mobile Home Park Outside cities and towns 475 Groundwater 5 0 0
Sunnyfield Acres Oconomowoc and land outside it 300 Groundwater 0 0 0
Oak Ridge Mobile Com 1 & 2 Fort Atkinson and land outside it 133 Groundwater 0 0 0
Breezy Knoll Community Lake Ripley and Cambridge 116 Groundwater 0 0 0
Stanton Place I Ixonia 66 Groundwater 0 0 0
Oak Ridge Mobile Com 4 Fort Atkinson and land outside it 60 Groundwater 1 0 0
River Valley Apts North Ixonia 48 Groundwater 0 0 0
River Valley Apts South Ixonia 48 Groundwater 1 0 0
Parkview Apartments Ixonia 45 Groundwater 4 1 0
Wolfs Mobile Homes Whitewater and land outside it 40 Groundwater 0 0 0
Hickory Hill Park LLC Watertown and land outside it 31 Groundwater 1 2 0
Rock River Mobile Home Park Johnson Creek and land outside it 30 Groundwater 0 1 0

Systems placed by county record in Jefferson County

7 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. 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
Lakewood Village County on record 160 Groundwater 0 0 0
Oak Ridge Mobile Com 3 County on record 58 Groundwater 0 0 0
Ripview Court 1 County on record 35 Groundwater 0 0 0
Ripview Court 4 County on record 35 Groundwater 0 0 0
Stanton Place II County on record 32 Groundwater 0 0 0
Ripview Court 2 County on record 31 Groundwater 0 0 0
Ripview Court 3 County on record 31 Groundwater 0 0 0

Cities and towns in Jefferson County

10 places

Back to Wisconsin

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