City and town drinking water records

Water systems serving Oconomowoc, WI

2 community water systems have a mapped service area in Oconomowoc, WI. Oconomowoc Waterworks covers 64% of the area inside Oconomowoc's Census boundary and reports serving 15,805 people in all.

None of them had a health-based violation in the last 10 years.

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

Their lead service line inventories list 780 lead lines, 1 galvanized line that must be replaced and 0 lines of unknown material.

3 more systems are placed in Oconomowoc by EPA's town record 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

2

Systems with a health-based violation, last 10 years

0

Systems with one unresolved

1

Lead service lines in inventories

780

Water systems serving Oconomowoc

2 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	Area	People served	Main source	Health-based violations, 10 years	Unresolved	Lead lines
Oconomowoc Waterworks	Covers 64% of Oconomowoc	15,805	Groundwater	0	0	780
Genesee Lake School South	Mapped area inside Oconomowoc	230	Groundwater	0	1	0

Systems placed by EPA's town record in Oconomowoc

3 systems

The service area maps EPA has for these systems do not line up with their own records. They are placed by EPA's town record (EPA lists them serving this town), and without a map they are not counted in the figures above.

System	Area	People served	Main source	Health-based violations, 10 years	Unresolved	Lead lines
Lake Drive Water Trust	Town on record	500	Groundwater	1	0	0
Sunnyfield Acres	Town on record	300	Groundwater	0	0	0
Genesee Lake School North	Town on record	110	Groundwater	0	0	0

Other cities and towns in Waukesha County

23 places

• Brookfield
• Butler
• Delafield
• Dousman
• Eagle
• Elm Grove
• Hartland
• Lannon
• Lisbon
• Menomonee Falls
• Mukwonago
• Muskego
• Nashotah
• New Berlin
• North Lake
• North Prairie
• Okauchee Lake
• Pewaukee city
• Pewaukee village
• Summit
• Sussex
• Wales
• Waukesha

Back to Waukesha County, WI

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