Drinking Water Utilities
The PSC oversees more than 575 drinking water utilities operating in Wisconsin, including municipal and investor-owned utilities. The PSC’s authority extends to any water system that provides water to the public for domestic, commercial, or industrial purposes. However, regional water authorities, cooperatives, water trusts, and private wells are generally not subject to PSC regulation.
Wastewater and Stormwater Utilities
The PSC regulates two of the more than 600 wastewater (sanitary sewer) and none of the stormwater utilities operating in Wisconsin. Local governing bodies are responsible for the operations and rates for unregulated sewer and stormwater systems; however, the PSC may get involved in customer complaints or disputes about rates and practices for any wastewater or stormwater utility in the state.
Water Utility Data
Those interested in viewing regulated utilities' financial and operating data can find utilities' annual reports in our E Services Portal. The portal includes both
municipal utility annual reports and
investor owned utility annual reports. In addition, visitors to the portal can run queries of
municipal utility data and
investor owned utility data.