Data and Databases - Drinking Water


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drinking water

This topic provides links to information about drinking water quality as well as the facilities and systems that supply drinking water.



Drinking Water Quality Monitoring and Regulatory Information

  • Drinking Water Quality

    The Division of Drinking Water requires laboratories to submit water quality data directly. The data is received twice. For assistance, please contact the DRINC portal administrator at drinc@waterboards.ca.gov.

  • Public Water System Information

    Drinking Water Watch is a public web portal to view public water systems (PWS) location, facilities, sources, and samples. The dataset provides multiple CSV extracts for all PWS, all water source facilities, and all sample points. The data on the web portal is sourced from US EPA database Safe Drinking Water Information System (SDWIS) as well as the Drinking Water Quality results hosted on the EDT Library dataset. For assistance, please contact sdwis@waterboards.ca.gov.

Water Supplier Information

  • Public Water System Service Area Boundary Tool (a.k.a. Water Boundary Tool)

    This interactive map tool can be used to explore public water system service area boundaries and download the boundary information . The water system service area boundaries are based on information provided directly by regulators and  participating water system suppliers via the California Environmental Health Tracking Program's Drinking Water Systems Geographic Reporting Tool, also known as the Water Boundary Tool (WBT).