site banner
Data, Tools, and Reports

New!Data, Tools, and Reports Factsheet

DWR has a long history of data collection and reporting as well as developing useful tools and reports across California. With the passage of the Sustainable Groundwater Management Act (SGMA) there is an increased need for local and state agencies and the public to easily access water data in order to make informed management decisions.

Download Data

Statewide Data Platforms - Download groundwater and related data for your area.

DWR's SGMA Portal

DWR's Water Data Library

Groundwater Tools

Interactive Maps – Explore groundwater related interactive maps and tools.

California DWR Land Use Viewer

California DWR Well Completion Report Map Application

Groundwater Information Center Interactive Map Application

Water Management Planning Tool

Groundwater Basin Boundary Assessment Tool

Disadvantaged Communities (DAC) Mapping Tool


DWR provides a number of existing integrated hydrologic modeling codes and applications available for use. A summary of these resources is available in the Modeling Tools Fact Sheet, along with frequently asked questions on DWR's Integrated Hydrologic Models and Water Budget Pilot Projects.

Modeling Code

Modeling Applications

Climate Change

DWR is providing data, tools, and guidance to assist GSAs with incorporating climate change into their GSPs. This effort leverages previous work done by DWR for the Water Storage Investment Program (WSIP). The anticipated release of this information is later in Fall 2017. Please refer to the Climate Change Fact Sheet for more information about what will be provided.

Maps and Reports

There are a variety of regional to statewide maps and reports currently available on the Groundwater Information Center. In addition the DWR Publications Repository has an extensive list of the publications and other media produced and distributed by the Department.

Statewide and Regional Reports

  1. SGMA Best Management Practices –DWR published Best Management Practices(BMPs) as in five areas to assist GSAs with developing GSPs.
  2. Bulletin 118 Interim Update 2016  - Contains key information to help local agencies meet Sustainable Groundwater Management Act requirements. Three critical pieces of information are provided in this update: details on Critical Conditions of Overdraft, Basin Boundaries, and Basin Prioritization details and criteria. In 2020, and every 5 years after, DWR will publish comprehensive updates to Bulletin 118.
  3. Water Available for Replenishment White Paper Available - This SGMA-required report presents DWR’s best estimate, based on available information, of water available for replenishment of groundwater in the state.
  4. California's Groundwater Update 2013 - Provides a foundational set of data and analyses of California’s groundwater basins, well infrastructure, monitoring efforts, aquifer conditions, and management practices.
  5. NASA Progress Report: Subsidence in California, March 2015-September 2016
  6. NASA Progress Report: Subsidence in the Central Valley, California, August 2015
  7. Geology of the Northern Sacramento Valley, California, June 2014
  8. SGMA Implementation Assistance Newsletter - Periodic SGMA Implementation Assistance Updates provide information on various resources for GSAs such as financial, planning, and technical assistance, as well as highlights of major SGM program news or events.

DWR and Other State and Federal Resources

DWR and other agencies are developing guidelines, tools, best management practices, and regulations to assist local agencies with their sustainable groundwater management planning efforts. Resources developed by DWR and other agencies are available here.

External and Local Agency Resources

Statewide and regional foundations, academic institutions, nonprofit organizations, and groups within and outside of California have prepared reference documents, presentations, case studies, and conceptual models intended to help local agencies make informed decisions about sustainable groundwater management. DWR makes these resources available to the public through its Sustainable Groundwater Management website; however, does so for the convenience of the user and is not responsible for its content. Resources prepared by external entities are available here.