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State Water Resources Control Board - Data and Databases

Data and Databases - Maps and Web Services

This topic provides links to maps that cover a wide range of Water Board programs and the beneficial uses they protect and restore. It also provides links to datasets that are directly available in machine readable file formats and regularly updated, such that they can support the automated machine-to-machine interaction required by web applications.

In addition, a subset of the datasets maintained by the Water Boards can be found on the State of California's Open Data Portal under the 'Water' category. That platform provides web services that enhance data accessibility, and we plan to continue adding datasets to that platform in the future. Note that the datasets found on that site mirror some of the datasets provided through this Water Boards portal.

Maps

  • Data Maps

    Maps that cover a wide range of Water Boards programs and the beneficial uses they protect and restore.

GIS Specific Web Services

  • Map Services

    Map services for the spatial data provided by many of the Water Boards’ map applications are open and available for public developer use via our GIS server endpoint. Map services are generally provided in ESRI REST, OGC WMS and KML formats. For questions regarding the use of the map services, please contact GIS@waterboards.ca.gov.

Flat Files

  • NPDES Permits (including Stormwater) (Excel)

    This Excel spreadsheet lists NPDES permits, including storm water general permit enrollees that are active or have been active within the past three years. The facility and discharger addresses are also provided. Please note there can be multiple listings for a single permit due to multiple dischargers, multiple facilities, and/or multiple address listings. Because the Regulatory Measure ID (column E) is a unique identifier for each permit, this number can be used to evaluate whether a particular permit is listed more than once. For assistance, please contact the CIWQS Help Center at ciwqs@waterboards.ca.gov or 866-792-4977.

  • Monthly Conservation Reporting Archive

    This page provides links Excel workbooks containing urban water supplier reports and cumulative savings and compliance datasets, which are updated monthly. Scroll to the heading labeled ‘Monthly Reporting Archive’ and click on the most recent month to download the most recent dataset.

  • Drinking Water Program Repository

    This page provides links to download flat files (CSV files and Excel workbooks) containing data covering a number of categories within the drinking water program, including annual reports from public water systems, a list of active public water systems (including contact, location, water source, and type), recent conservation reports for small water suppliers and urban water suppliers, and drinking water quality results from 2013 to present. For assistance, please contact the DRINC portal administrator at drinc@waterboards.ca.gov.

  • Sanitary Sewer Overflow Reduction Program Data

    This dataset contains information about any overflow, spill, release, discharge or diversion of untreated or partially treated wastewater from a sanitary sewer system. SSOs include: overflows or releases of untreated or partially treated wastewater that reach waters of the United States; overflows or releases of untreated or partially treated wastewater that do not reach waters of the United States; and wastewater backups into buildings and on private property that are caused by blockages or flow conditions within the publicly owned portion of a sanitary sewer system.