This page provides current water, sanitary sewer, and stormwater rates for Wauwatosa utility customers.
Sewer Rates
Effective February 1, 2026
Sewer charges include local sewer charges and charges from the Milwaukee Metropolitan Sewerage District (MMSD).
MMSD Charges
MMSD charges help fund regional wastewater treatment and sewer services.
| Customer type | Quarterly connection charge | Flow charge per 100 cubic feet |
|---|---|---|
| Residential | $16.41 | $2.4842 |
| Nonresidential | $15.00 | $2.33119 |
Local Sewer Charges
Local sewer charges help maintain Wauwatosa’s sanitary sewer system. Charges are calculated quarterly based on water usage.
[View current local sewer rates]
Stormwater Rates
Effective February 1, 2026
The stormwater charge helps maintain Wauwatosa’s storm sewer system.
The quarterly rate is $35.63 per equivalent residential unit (ERU).
An ERU is a standard unit used to calculate stormwater charges based on the amount of impervious surface on a property, such as roofs, driveways, parking areas, and other paved surfaces.
[Learn more about how stormwater charges are calculated]
Understanding Rate Changes
Utility rates may change to support the operation, maintenance, and improvement of water and sewer infrastructure.
Local sewer rates are established by the City of Wauwatosa. MMSD rates are established separately and are passed to Wauwatosa utility customers.
[View current and previous utility rates]
Questions About Your Utility Rates?
Contact the Wauwatosa Water Utility at [phone number] or [email address].