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Status: The water tool is functioning normally.

Water Boundary Tool

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California Environmental Health Tracking Program

850 Marina Bay Pkwy, P-3
Richmond, CA 94804

(510) 620-3038
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Last Edited: 4/21/2015

Drinking Water Systems Geographic Reporting Tool


Welcome to the California Environmental Health Tracking Program (CEHTP) Drinking Water Systems Geographic Reporting Tool, also known as the Water Boundary Tool. This tool is specifically for use by California public water systems, local primacy agencies, and state water programs.

The Water Boundary Tool is currently online and functional. All basic mapping activities are again possible including uploading of shapefiles and KML files as well as all basic manual drawing and editing functionality. Due to ongoing maintenance, some components are still unavailable, including the ability to refine sections to follow street paths or property lines, or to move a point to the nearest street.

If you encounter a problem in entering your data, or you would like help in doing so, please contact us by clicking here. Please be patient as we continue to implement remaining repairs to the tool.

To begin using the tool, users must register for an account.  If you already have an account, please log in.  To learn more about the tool, select from the topics below.   

Read the welcome letter from the Division of Drinking Water and Environmental Management.


What's new 


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About the tool

The Water Systems Geographic Reporting Tool allows personnel from water systems, state primacy field operations districts, local primacy agencies (LPAs), other state agencies, and other qualified individuals to input and edit customer service area boundaries for drinking water systems throughout California. 

The tool also allows users to:

  • Create and edit service area boundaries
  • Track boundaries as they change over time
  • Collaborate with other users to improve accuracy of boundaries
  • View boundaries on Google Maps
  • Export digital files of the customer service areas

To learn more, view FAQs or our presentation at the CA/NV American Water Works Association conference on March 30, 2011.

To begin using the tool, users must register for an account.


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Purpose of the tool

CEHTP, along with our partners, created this tool with the following goals:

  • Produce a high resolution, digital map of drinking water system customer service areas for the entire state of California
  • Assist water systems in digitizing their customer service area boundaries and identifying their neighboring systems
  • Create a geographic information system (GIS) layer that can be used for:
    • Emergency preparedness
    • Public health prevention and response
    • Research to better understand the relationship between drinking water, health, and the environment

 To learn more about the tool, view FAQs and our Spring 2012 Newsletter.  Learn about how the tool has been used in our Spring 2013 Newsletter


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Partnerships and support

The California Environmental Health Tracking Program (CEHTP) initiated this effort; developed, deployed, and maintains the tool; and hosts the website.  Our partners have been essential in this effort, offering key information and support.


The former CDPH Division of Drinking Water and Environmental Management provided information about the public water systems in the state, which was essential to the tool's development; facilitates relationship-building with water systems and other key stakeholders; and provides guidance and support in the tool's implementation.


The UC Davis Information Center for the Environment (ICE) conducts outreach to water systems, pre-populates the tool with boundaries obtained from various sources, and provides software development support and guidance.


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For assistance and information

For more information, contact the tool administrator.  Please notify us of any problems with our tool.  We welcome your comments and feedback.


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