,The is a curated dataset of information for all public water systems (PWS) in California, including the name, location and some general informaiton for each PWS. The source of the data https://sdwis.waterboards.ca.gov/PDWW/ is a public web portal to view public water systems (PWS) location, facilities, sources, and samples.,

,The California Water Boards’ Water Data Center is proud to present the CA Water Quality Status Report. This report is an annual data-driven snapshot of the Water Board's water quality and environmental data. This inaugural version of the report is based solely on the surface water datasets available via the [Surface Water Ambient Monitoring Program (SWAMP)] (http://www.waterboards.ca.gov/swamp/) and in future years we hope to expand this to include the groundwater, drinking water and water resource datasets available in our state. Our goal is to use data to inform both data storytelling (as in this inaugural report) and water quality indicators, including watershed report cards.,The 2017 Water Quality Status Report is organized around seven major themes that our team thought both individually and collectively tell important stories about the overall health of our state’s surface waters. Each theme-specific story includes a brief background, a data analysis summary, an overview of management actions, and access to the raw data.,For more information please contact the Office of Information Management and Analysis (OIMA).,,Data for the section “Setting Flow Targets to Support Biological Integrity in Southern California Streams” can be found on the California open data portal. Data for the section “Nutrients and Algae in Aquatic Ecosystems” can be found here.,

California's Groundwater: Bulletin 118 Updates (CalGW Updates) are California's foremost technical publications on groundwater in the state. The Department of Water Resources is legislatively mandated by Water Code Section 12924 to publish CalGW Updates every 10 years. This page includes the DRAFT publication of California's Groundwater: Bulletin 118 - Update 2025 (CalGW Update 2025). The Department of Water Resources released this draft publication on October 20th, 2025, opening a 45-day public comment period, and will hold a public webinar on November 4, 2025 to answer questions and solicit comments. Public comments can be emailed to CalGW@water.ca.gov and will be accepted through Friday, December 5, 2025. The draft publication contains a summary Highlights (available in English and Spanish) and a detailed statewide report (Chapters 1 – 6), which features current knowledge of groundwater resources including information on the location, characteristics, use, management status, and conditions of the state’s groundwater. Also included in this draft release is an info-graphic summary of the ten hydrologic regions, showing regional groundwater at a glance (Chapter 7) and some draft appendices including: findings and recommendations that support the future management and protection of groundwater; a glossary of terms; reference materials; and an update on land subsidence in California. For more information on CalGW Updates, historical publications, and supporting information products that include the CalGW Live website and California’s Groundwater: Semi-Annual Updates, please visit: https://water.ca.gov/programs/groundwater-management/bulletin-118.

,Public Water Systems (PWS) submit their annual reports with rate information using the Electronic Annual Report (EAR) submission process on the Drinking Water Information Clearinghouse (DRINC) portal, which is reviewed, and manually updated into the Safe Drinking Water Information System (SDWIS). This includes the water rates reported by PWS in the EAR for years 2014 and 2015.,

This dataset looks at all aspects of storm water management in California as managed and regulated by the State Water Resources Control Board, from the **[Stormwater Multiple Application and Report Tracking System (SMARTS)](https://smarts.waterboards.ca.gov)**.

,The Division of Drinking Water requires laboratories to submit water quality data directly. The data is received, and published twice monthly on the Division's water quality portal. The resource here now is just a data dictionary for the laboratory analysis data available from that portal, and in the near future we plan to add curated data resources that include laboratory water quality results.,

California's Groundwater: Bulletin 118 Updates (CalGW Updates) are California's foremost technical publications on groundwater in the state. The Department of Water Resources is legislatively mandated by Water Code Section 12924 to publish CalGW Updates every 10 years. This page includes the DRAFT publication of California's Groundwater: Bulletin 118 - Update 2025 (CalGW Update 2025). The Department of Water Resources released this draft publication on October 20th, 2025, opening a 45-day public comment period, and will hold a public webinar on November 4, 2025 to answer questions and solicit comments. Public comments can be emailed to CalGW@water.ca.gov and will be accepted through Friday, December 5, 2025. The draft publication contains a summary Highlights (available in English and Spanish) and a detailed statewide report (Chapters 1 – 6), which features current knowledge of groundwater resources including information on the location, characteristics, use, management status, and conditions of the state’s groundwater. Also included in this draft release is an info-graphic summary of the ten hydrologic regions, showing regional groundwater at a glance (Chapter 7) and some draft appendices including: findings and recommendations that support the future management and protection of groundwater; a glossary of terms; reference materials; and an update on land subsidence in California. For more information on CalGW Updates, historical publications, and supporting information products that include the CalGW Live website and California’s Groundwater: Semi-Annual Updates, please visit: https://water.ca.gov/programs/groundwater-management/bulletin-118.