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State Water Resources Control Board - Data and Databases

Data and Databases - Surface Water

This topic includes information about surface water allocation and use, monitoring data related to ambient surface water quality and discharges to surface water, and an identification of waters determined by the Water Boards to be impaired and unable to support designated beneficial uses.

Water Rights Permits and Licenses

  • Electronic Water Rights Information Management System (eWRIMS) Database

    The eWRIMS Database System provides information about water rights throughout California. It includes information on Statements of Water Diversion and Use that have been filed by water diverters, as well as registrations, certificates, and water right permits and licenses that have been issued by the State Water Resources Control Board and its predecessors. You can search for water rights by several criteria, including the water right owner's name, watershed, stream system, and county. In addition, the eWRIMS Web Mapping Application provides the spatial location of water rights throughout California. For assistance please visit the eWRIMS Help Center, or contact the Division of Water Rights at 916-341-5300 or ewrims@waterboards.ca.gov.

Water Quality and Toxicity Monitoring

  • California Environmental Data Exchange Network (CEDEN)

    CEDEN is a central location to find and share information about California’s water bodies, including streams, lakes, rivers, and the coastal ocean. Many groups in California monitor water quality, aquatic habitat, and wildlife health to ensure good stewardship of our ecological resources, and CEDEN aggregates this data and makes it accessible to environmental managers and the public. For assistance, please contact the CEDEN Administrator at ceden@waterboards.ca.gov.

Water Quality Compliance and Enforcement Actions

Impaired Water Bodies Report (or 303(d) Report)

  • 303(d) Reports

    Select the tab labeled ‘303(d) List’ near the bottom of the page to view a list of Water Quality Limited Segments under Section 303(d) of the federal Clean Water Act, which requires states to identify waterbodies that do not meet water quality standards and are not supporting their beneficial uses. The list identifies the pollutant or stressor causing impairment, and establishes a schedule for developing a control plan to address the impairment.

Surface Water Ambient Monitoring Program (SWAMP)

  • Surface Water Ambient Monitoring Program (SWAMP)

    The Surface Water Ambient Monitoring Program (SWAMP) mission is to provide resource managers, decision makers, and the public with timely, high-quality information and tools needed to evaluate the condition of surface waters throughout California. SWAMP accomplishes this through its statewide and regional ambient monitoring programs and by maintaining the infrastructure to support the production of high quality data and tools for data analysis and interpretation.