A Public Water System (PWS) provides piped water to the public for human consumption. Wisconsin PWSs are regulated under the Safe Drinking Water Act (SDWA). This site allows you to query and download data from our database, the Drinking Water System (DWS), which is maintained and used by DNR SDWA regulators. Information is current as of approximately 10 p.m. the prior day. It includes information such as PWS monitoring and other requirements, sample results, violations, inspection findings, plan/document review status, etc. For assistance using this tool, please refer to the "Help" link in the upper right corner. If your question is not answered there or you receive an error, please email DNRPublicWaterApplicationSupport@wisconsin.gov for further assistance.