Wastewater Department

The Wastewater Treatment Plant (WWTP) operates under the regulations of the Wisconsin Department of Natural Resources (DNR).  WWTP employees are state licensed wastewater operators.

The DNR reissues the Utility a wastewater discharge permit. The permit is updated and reissued every five years and contains water quality requirements that the Utility must meet to protect our lakes and streams.

The Utility (effective January 1, 2019) is responsible for sewer main and the direct connection of laterals from structures throughout the city. The "direct connection' is defined as the coupling resulting in the connection of a privately owned sewer lateral to the city sewer main.  Sewer lateral maintenance and repair is the responsibility of the property owner.

Sewer Main Cleaning

We're committed to providing our customers with uninterrupted sewer service. To accomplish this, we must periodically clean the sewer main that is located deep below the street.

The sewer main transports the wastewater from your home to the treatment facility where it is treated and eventually discharged to Maunesha River. Our Vacuum Cleaning Truck will periodically block city streets to accomplish this task.

How it Works

To clean the sewer main, we use a combination high pressure/vacuum cleaning truck. A hose is fed through a manhole until it reaches the upstream manhole. The water pressure is increased as the hose is reeled back towards the truck.

The nozzle located on front of the hose, scours the inside of the pipe effectively removing grease and debris from the main. The debris that is cleaned from the main is vacuumed out at the downstream manhole.


Rates for wastewater are approved by the City of Waterloo Common Council. Current rates are effective November 1, 2018.

Monthly Customer Charge $16.81

Volumn Charge per 1,000 gallons  $6.71 (based on the water reading)


Summer sewer maximum is explained here.


Help us reduce chlorides at our Wastewater Treatment Plant.  By upgrading  your water softener to a demand-initiated regeneration control  model  you can help make a difference.  Demand-initiated regeneration control means that the water softener will regenerate based on the amount of water that has been treated instead of a timer, reducing the amount of salt you use and send to our Wastewater Treatment Plant.  Wastewater Treatment Plants cannot break down chlorides (residual of the salt) therefore the chlorides are released into our streams and rivers.  By reducing chlorides we will help protect our natural resources.

The utility has started a water softener rebate program to help customers upgrade to demand-initiated regeneration (DIR) water softeners,  please click here for info and rebate form.

City of Waterloo ordinance 340-12 (G) requires that new water softeners have demand-initiated regeneration controls with a minimum salt efficiency of 3,350 grains’ hardness per pound of salt.