• Sun Prairie Utilities Annual Water Quality Report.

    SPU staff are proud to report that Sun Prairie's drinking water continues to meet all Federal and State standards for health and safety. Click to find the 2023 Water Quality Report >>

  • Diggers Hotline

    Contact Diggers Hotline 3 working days before you start a project that involves digging so underground public utility infrastructure can get marked. Call 8-1-1, or visit diggershotline.com.

  • Sun Prairie Utilities is a Reliable Public Power Provider.

    SPU recently received a Reliable Public Power Provider Diamond-level designation - ranking us in the upper 6%! Click the image to read more >>

  • Image of Sun Prairie Utilities Welcome Packet.

    We created a packet to help customers find useful information about the utility in one document. Check it out >>

  • Plans are underway to build a new facility to help us serve the growing community! View the latest >>


As a way to maintain a safe and dependable drinking water supply, Sun Prairie Utilities (SPU) practices cross connection investigation and solutions. These inspections are through the...


You may see our crews flushing hydrants in Sun Prairie. Your water’s color and pressure could be impacted. 

Please update your email address. We are...


Everyone needs help sometimes, especially when the cost of living increases. Sun Prairie Utilities has compiled a list of resources you can use to help meet the cost of your utility bills.