Tap Truth EPA drinking water records, in plain English

County drinking water records

Rock County, WI drinking water systems

16 community water systems serve Rock County, WI, reporting 125,173 people served in all.

9 of them (56%) had at least one health-based violation in the last 10 years. 4 systems still have one unresolved.

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

Their lead service line inventories list 2,254 lead lines, 1,573 galvanized lines that must be replaced and 14,150 lines of unknown material.

4 more systems are placed in Rock 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
16
People served, sum of each system's own figure
125,173
Systems with a health-based violation, last 10 years
9
Systems with one unresolved
4
Lead service lines in inventories
2,254

Water systems serving Rock County

16 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
Janesville Water Utility Janesville 64,415 Groundwater 0 0 3
City of Beloit Beloit 36,677 Groundwater 2 0 1,955
Evansville Waterworks Evansville 5,703 Groundwater 6 0 261
Milton Waterworks Milton 5,588 Groundwater 1 0 31
Edgerton Waterworks Edgerton 5,512 Groundwater 2 1 0
Clinton Waterworks Clinton 2,119 Groundwater 0 0 4
Orfordville Waterworks Orfordville 1,475 Groundwater 0 0 0
Rockvale MHP Janesville and land outside it 1,200 Groundwater 0 0 0
Footville Waterworks Footville 816 Groundwater 1 0 0
Rock River Leisure Estates Coop Edgerton and land outside it 650 Groundwater 0 0 0
Caravilla Education and Rehab Center Janesville and land outside it 298 Groundwater 1 4 0
Wrights Mobile Home Park Outside cities and towns 240 Groundwater 2 0 0
Midway Village Mobile Home Park Evansville 160 Groundwater 2 2 0
Shady Hill Mobile Home Park Clinton and land outside it 140 Groundwater 2 2 0
Oakhill Waterworks Edgerton and land outside it 130 Groundwater 0 0 0
Mountain View MHP 1 Evansville and land outside it 50 Groundwater 0 0 0

Systems placed by county record in Rock County

4 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
Fulton Utility District County on record 200 Purchased groundwater 1 3 0
Birchwood Trailer Court County on record 32 Groundwater 1 3 0
Pirates Cove Mobile Home Community County on record 25 Groundwater 1 0 0
Mountain View MHP 2 County on record 25 Groundwater 0 0 0

Cities and towns in Rock County

8 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