Drinking Water Portal - Summary of Public Water Supply (PWS) Information

Data Source: SDWIS/Data as of Nov 2025

Note: A PWS can use any combination of water sources in its system. The PWS is classified by the source that is most vulnerable to contamination.
Surface water systems are the most vulnerable to contamination.

Data Source: SDWIS/Data as of Nov 2025

Note: A PWS can use any combination of water sources in its system. The PWS is classified by the source that is most vulnerable to contamination.
Surface water systems are the most vulnerable to contamination.