Sump pump discharge rules in Waukesha, WI

Wisconsin · Last checked November 2026

Key facts

Not allowed

Sanitary sewer, floor drains and basement sinks (Municipal Code 29.06).

Setback

At least 8 feet from the back of the sidewalk.

How it works

Almost every city bans sump pump water from the sanitary sewer, because clean water overloads treatment plants and backs sewage into basements. Where you can send it instead varies: some cities ban street and curb outlets, some allow them in summer only, and some require a storm sewer connection.

1. Make sure the pump does not drain into a floor drain, laundry tub or sanitary line.
2. Route the discharge to your yard, far enough from the foundation and the sidewalk that it soaks in.
3. Do not run hoses across the sidewalk or drill the curb unless the city allows it in writing.
4. Ask the city about a storm sewer connection permit if your yard cannot absorb the water.

What it costs

Rerouting a discharge line or adding a buried outlet is often a few hundred dollars. A storm sewer connection or a new sump system costs more and usually needs a permit.

More in Wisconsin and nearby

• Fox Crossing Allowed with conditions
• Kenosha No street or curb discharge
• Perry Street discharge limited by season
• Mount Prospect Allowed with conditions
• South Elgin Allowed with a permit
• Sturgis Allowed with conditions