Local guide
Plumbing in Waunakee: what to know
Waunakee draws its water from deep groundwater wells, and the village has clear rules about what can drain into the sewer. Here is what to know.
Where the water comes from
Waunakee Utilities supplies water from deep groundwater wells.
Hard water
The Madison Metropolitan Sewerage District estimates Waunakee water at 15 grains of hardness.
Sump pumps
Waunakee Utilities says sump pumps connected to the sewer line are illegal and can cause sewage to back up into the home.
Permits and inspections
The Village of Waunakee contracts with General Engineering Company for building inspection services.
Your nearest office
Our Madison office at 3126 Watford Way. Call (608) 273-4556.
Services in Waunakee
How we help homes and businesses in Waunakee
Questions we hear
Waunakee plumbing questions
Can my sump pump drain into the sewer in Waunakee?
No. Waunakee Utilities says those connections are illegal and can cause sewage backups. Disconnect them from the sewer line.
How hard is Waunakee water?
The Madison Metropolitan Sewerage District estimates 15 grains per gallon. See water softeners.
Do you handle emergencies in Waunakee?
Yes. Call (608) 273-4556 any time.
Sources: Waunakee Utilities water · Waunakee sewer backup information · MMSD water hardness map · Waunakee Building Inspection. Checked October 2026.