Kaukauna Utilities Shares Next Steps
Kaukauna Utilities continues to make steady progress on its reverse osmosis water treatment project. This generational investment will modernize the community’s water treatment process and ensure reliable, high-quality water for years to come.
Project Progress
In May 2025, the Public Service Commission of Wisconsin (PSCW) issued a Certificate of Authority for Kaukauna Utilities to move forward with the project – a pivotal step that confirms the project is both cost-effective and environmentally responsible. Since receiving approval, Kaukauna Utilities has worked closely with its engineering consultants to develop detailed plans and specifications for the new facilities.
The Wisconsin Department of Natural Resources (WDNR) is currently reviewing those plans to ensure compliance with all regulatory requirements.
What’s Next
Over the coming months, several key milestones will move the project from design to construction:
- November 2025: Final project specifications completed.
- December 2025: Project bidding opens for interested contractors; documents available through QuestCDN.com.
- January 2026: Bids due.
- February 2026: Contract award anticipated.
- March 2026: Risk identification and mitigation workshop and preconstruction meeting held with the selected contractor.
- Spring 2026: Construction begins following preconstruction activities.
- Summer 2028: Project completion.
Construction Focus
Initial construction will center on Water Treatment Plant 1 (WTP1), located adjacent to the City Pool. This new facility will replace the existing ground storage reservoirs and main filter plant, which date back to the early 1900s. Completing WTP1 first will allow Kaukauna Utilities to continue operations without depending on aging infrastructure during the remainder of the project.
Looking Ahead: Water Softener Program
Because reverse osmosis filtration significantly reduces water hardness, Kaukauna Utilities will develop a water softener optimization or removal program in 2026, with implementation beginning in 2027. This program will help customers assess whether to adjust or remove their home softeners, depending on individual preferences. As stated in the May 2025 press release, Kaukauna Utilities is targeting a water hardness for customers of about 5.5 grains, a substantial improvement from the current ~40 grains.
Kaukauna Utilities is committed to keeping customers informed every step of the way. Regular updates and project milestones will continue to be shared through the Reverse Osmosis Project page on our website at kaukaunautilities.com/reverseosmosis. We thank our customers for their ongoing interest and support as we build a stronger, more resilient water system for the future.
