Tap Truth EPA drinking water records, in plain English

County drinking water records

Ozaukee County, WI drinking water systems

36 community water systems serve Ozaukee County, WI, reporting 62,146 people served in all.

6 of them (17%) had at least one health-based violation in the last 10 years. 13 systems still have one unresolved.

34 rely mainly on groundwater and 2 on surface water, counting water bought from other systems.

Their lead service line inventories list 641 lead lines, 102 galvanized lines that must be replaced and 1,088 lines of unknown material.

12 more systems are placed in Ozaukee 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
36
People served, sum of each system's own figure
62,146
Systems with a health-based violation, last 10 years
6
Systems with one unresolved
13
Lead service lines in inventories
641

Water systems serving Ozaukee County

36 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
Port Washington Waterworks Port Washington 12,853 Surface water 0 0 249
Grafton Waterworks Grafton 12,269 Groundwater 0 0 0
Cedarburg L & W Commission Cedarburg 11,800 Groundwater 0 0 386
Mequon Water Utility Mequon 11,152 Purchased surface water 0 0 0
Saukville Waterworks Saukville 4,268 Groundwater 0 0 6
Belgium Waterworks Belgium 2,493 Groundwater 1 1 0
Fredonia Waterworks Fredonia and Waubeka 2,279 Groundwater 0 0 0
Concordia University Mequon 1,500 Groundwater 0 0 0
Mequon Trail Townhomes Mequon 615 Groundwater 1 2 0
Beechwood Farms Estates Mequon 300 Groundwater 0 0 0
Westchester Lakes Subdivision Mequon 300 Groundwater 0 0 0
Park Place Subdivision Mequon 260 Groundwater 0 0 0
Brighton Ridge Subdivision Mequon 200 Groundwater 0 0 0
Century Estates 1 Thiensville and Mequon 130 Groundwater 0 1 0
Village Heights Thiensville 130 Groundwater 0 1 0
Vintage Estates Mequon 130 Groundwater 1 2 0
Kenilworth Subd Mequon 120 Groundwater 0 0 0
Mequon on the Square Condominium Owners Association Inc Mequon 110 Groundwater 0 0 0
River Lake Subdivision Mequon 100 Groundwater 0 0 0
Wyngate Subdivision Mequon 100 Groundwater 0 0 0
Woodridge Estates Mequon 100 Groundwater 0 0 0
Linden Lane Apts 117 Saukville and Thiensville and land outside them 90 Groundwater 0 0 0
Highland Colony Estates Condo Mequon 88 Groundwater 0 0 0
River Trails Estates Water Users Mequon 84 Groundwater 1 2 0
Laurel Lakes 608 Thiensville 80 Groundwater 0 1 0
Grand Ave Apartments Thiensville 80 Groundwater 0 0 0
Mequon Colony Estates Mequon 75 Groundwater 0 1 0
Alberta Subdivision Thiensville 75 Groundwater 0 0 0
Linden Lane Apts 141 Thiensville 75 Groundwater 0 1 0
Laurel Lakes 508 Mequon and Thiensville 50 Groundwater 0 1 0
Waters Edge Condominium Association Thiensville 50 Groundwater 0 0 0
Williamsburg 206 Thiensville 48 Groundwater 1 2 0
Heidel Rd Apts 139 Thiensville 40 Groundwater 2 1 0
Heidel Rd Apts 152 Thiensville 40 Groundwater 0 1 0
Williamsburg 220 Thiensville 32 Groundwater 0 0 0
Village Glen Apts Thiensville 30 Groundwater 0 0 0

Systems placed by county record in Ozaukee County

12 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
Huntington Park County on record 600 Groundwater 0 0 0
Pines Subdivision County on record 200 Groundwater 1 2 0
Haddonstone Subdivision County on record 195 Groundwater 0 0 0
Country Terrace Condo Homes County on record 160 Groundwater 0 0 0
Osprey Mobile Home Park County on record 150 Groundwater 5 0 0
Ravine Farms HM Owners Assoc County on record 100 Groundwater 0 0 0
Williamsburg 207 209 and 214 County on record 70 Groundwater 3 12 0
Mequon Parc Apartments LLC County on record 60 Groundwater 0 1 0
Stonecroft Condominium Assn County on record 50 Groundwater 1 2 0
PW Lake View Estates LLC County on record 30 Groundwater 2 0 0
Mequon Water Trust County on record 26 Groundwater 1 2 0
River Garden Apts County on record 25 Groundwater 1 3 0

Cities and towns in Ozaukee County

9 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