This dataset represents polygon boundaries of all public water agencies in California including public water systems, agricultural water districts, urban water districts, Federal and State water contractors, wholesalers, retailers, and other public or private utilities that deliver water to the end user.

Polygonal representation of the California Water Service District area.

Data from a survey of California water districts focusing on their messaging campaigns.

This polygon shapefile depicts the boundaries of water districts in the County of San Mateo, California. A water district is a special district given the task of supplying water and sewer needs to a community. This layer is part of a collection of GIS data for San Mateo County, California.

This polygon shapefile contains the boundaries of water districts within San Joaquin County, California. Year: 2020.

Community Service Districts

Data are a graphic representation of water district boundaries in Marin County, California.

Minor water districts provide services to local communities and operate within the boundaries of larger "major" water distircts.Updated by:Mickey Zolezio 7/2015

The Geographic Information Systems (GIS) Unit falls under the purview of the County of Santa Cruz Information Services Department. The GIS Unit serves all County departments and external customers and provides data on land, features and people of Santa Cruz County. Santa Cruz County encompasses 4 cities and approximately 265,000 people. This coverage can be used for basic applications such as viewing, querying and map output production, or to provide a basemap to support graphical overlays and analyses of geospatial data.

This feature class contains features representing the Metropolitan Water District of Southern California (County of Ventura portion only) Sphere of Influence. Sphere matches Calleguas Municipal Water District sphere as of 3/15/2023. Provides wholesale water from the State Water Project to cities and other districts for the entire area south of the Santa Clara River. Any change to the sphere of influence lines will need to be done to the Calleguas Municipal Water District also.

A source water assessment identifies the vulnerability of the drinking water supply to contamination from typical human activities. The assessments are intended to facilitate and provide the basic information necessary for a local community to develop a program to protect the drinking water supply.

The Sacramento County Geographic Information Systems (GIS) unit falls under the purview of the Sacramento County Department of Technology and is tasked with initiating, integrating and promoting the use of GIS Technology in the support of County business goals and objectives. This coverage can be used for basic applications, such as viewing, querying and map output production, or to provide a base map to support graphical overlays and analyses of geospatial data.

The California Department of Water Resources (DWR) discrete (vs. continuous) water quality datasets contains DWR-collected, current and historical, chemical and physical parameters found in routine environmental, regulatory compliance monitoring, and special studies throughout the state.

This polygon shapefile depicts boundariesfor Community Service Districts and Spheres of Influence in the County of Humboldt, California. A Community Services District is a Special District created in 1952 and provides water, sewer and street lighting to the unincorporated areas surrounding the City of Eureka known as Pine Hill, Cutten, Rosewood, Myrtletown, Humboldt Hill, Fields Landing, King Salmon, Pigeon Point and Freshwater. A five-member elected Board of Directors governs the District. The Board assumes responsibility for the adoption of this plan while the General Manager oversee its implementation. As of June 2013, the District served 7,526 water connections, 6,326 sewer connections and Street Lights with a staff of 21. Funding comes primarily through rates and revenue bonds.

Data for groundwater-levels measured in 616 wells during water year 2020 (November 2019-June 2020) by the United States Geological Survey (USGS), the Mojave Water Agency (MWA), and other local water districts were compiled to construct a regional water-table shapefile for 2020. The regional water-table shapefile shows the elevation of the water table in and around the Mojave River and Morongo areas, in San Bernardino County, California.

The California Department of Water Resources (DWR) has released a draft "Handbook for Water Budget Development: With or Without Models" (Water Budget Handbook), a single-volume, technical reference that systematically presents existing information on various methods and data sources for developing water budgets. The Water Budget Handbook can help in the development of water budgets for any geographic area and time period, and uses modeling and non-modeling approaches.

In order to provide an accurate data set of service area boundaries for California drinking water systems, the Division of Drinking Water of the California Water Resources Control Board (SWRCB DDW) has undertaken a project to vet and verify the data collected by the Tracking California's Water Boundary Tool (WBT).Note: This feature layer is updated on a regular basis. However, in some locations where it is shared, it shows the “Data Updated” date as the last time the item has changed, not the data. To accurately determine when the data was last updated, open the data table and sort by Last Edited Date field.SWRCB DDW downloaded a copy of the current water system service areas loaded in the WBT as of June 27, 2019. Additional attribute fields indicating verification status, verification staff and system type were appended to the data set. SWRCB DDW staff are reviewing and validating the displayed boundaries of each service area as well as contacting the service providers regarding necessary corrections. The verification status of any particular service area may be found in the Verification Status field.For any questions regarding this dataset, please contact the Data Support Unit at DDW-DSU@waterboards.ca.gov.

Department of Water Resources California Water Plan program computes applied, net, and depletion water balances for California. Water balances are simplified water budgets for a water year based on analyses of developed and dedicated water supplies, water uses by sector, water reuses, operational characteristics for an area, and inflows and outflow for a study area that occur above the root zone. Dedicated and developed water supplies include surface water, groundwater, reused and recycled water. Water uses by sector for these analyses include parameters for agriculture, urban, managed wetlands, Wild and Scenic river annual volumes, minimum required instream flows, and minimum required delta outflow, recognizing that water is often used multiple times and benefits multiple sectors. Water balance results show what water was applied to actual uses so that use equals supply. Recent data provided includes water uses and supplies for WYs 2002-2022 at Detailed Analysis Unit by County (DAUCO), Planning Area (PA), Hydrologic Region (HR), and Statewide spatial scales. Computation and aggregation equations for applied, net, and depletion water balances are included in the Standard Operating Procedures (SOPs) for data management and analyses. Zipped data files are in .CSV format.

The California Water Plan Update 2023 Water Balances Supporting Document includes water use and supply discussion, graphics, and links to files and folders of water use and supply data for 1998-2020, and related information. The Update 2023 Standard Operating Procedures (SOPs) for Water Balances Automation includes detailed technical information, diagrams, equations, controlled vocabulary, and definitions.

California Water Plan Update 2028 is underway and will include data through WY 2024.

This feature class contains features representing the Metropolitan Water District of Southern California (County of Ventura portion only). Formation matches Calleguas Municipal Water District boundary as of 3/15/2023. Provides wholesale water from the State Water Project to cities and other districts for the entire area south of the Santa Clara River.Annexation/Detachments to Calleguas Municipal Water district will trigger the same Annexation/Detachment to this FC.Any change to the annexation/boundary lines will need to be done to the Calleguas Municipal Water District also.

Use Constraints:This mapping tool is for reference and guidance purposes only and is not a binding legal document to be used for legal determinations. The data provided may contain errors, inconsistencies, or may not in all cases appropriately represent the current boundaries of PWSs in California. The data in this map are subject to change at any time and should not be used as the sole source for decision making. By using this data, the user acknowledges all limitations of the data and agrees to accept all errors stemming from its use.Description:This mapping tool provides a representation of the general PWS boundaries for water service, wholesaler and jurisdictional areas. The boundaries were created originally by collection via crowd sourcing by CDPH through the Boundary Layer Tool, this tool was retired as of June 30, 2020. State Water Resources Control Board – Division of Drinking Water is currently in the process of verifying the accuracy of these boundaries and working on a tool for maintaining the current boundaries and collecting boundaries for PWS that were not in the original dataset. Currently, the boundaries are in most cases have not been verified. Map Layers· Drinking Water System Areas – representation of the general water system boundaries maintained by the State Water Board. This layer contains polygons with associated data on the water system and boundary the shape represents.· LPA office locations – represents the locations of the Local Primacy Agency overseeing the water system in that county. Address and contact information are attributes of this dataset.· LPA office locations – represents the locations of the Local Primacy Agency overseeing the water system in that county. Address and contact information are attributes of this dataset· California Senate Districts – represents the boundaries of the senate districts in California included as a reference layer in order to perform analysis with the Drinking Water System Boundaries layers.· California Senate Districts – represents the boundaries of the assembly districts in California included as a reference layer in order to perform analysis with the Drinking Water System Boundaries layers.· California County – represents the boundaries of the counties in California included as a reference layer in order to perform analysis with the Drinking Water System Boundaries layers.Informational Pop-up Box for Boundary layer· Water System No. – unique identifier for each water system· Water System Name – name of water system· Regulating Agency – agency overseeing the water system· System Type – classification of water system.· Population the approximate population served by the water system· Boundary Type – the type of water system boundary being displayed· Address Line 1 – the street or mailing address on file for the water system· Address Line 2 – additional line for street or mailing address on file for the water system, if applicable· City – city where water system located or receives mail· County – county where water system is located· Verification Status – the verification status of the water system boundary· Verified by – if the boundary is verified, the person responsible for the verification Date Created and Sources:This web app was most recently updated on July, 21, 2021. Each layer has a data created date and data source is indicated in the overview/metadata page and is valid up to the date provided.