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Drinking Water Supply Service Area Lookup Tool

This map-based tool can be used to determine who the water supplier is for a certain area. The water supplier boundaries are based on information provided directly by participating water suppliers via the California Department of Public Health Drinking Water Systems Geographic Reporting Tool. The map does not have complete coverage for the entire state since service area boundaries were provided on a voluntary basis. In some cases, there may also be overlap in mapped water supplier boundaries due to multiple suppliers covering the same area on a retail and wholesale basis or due to mapping errors that occurred when the data were input.

You may zoom in and out on the map by one of following methods:

  • Click on the plus (+) or minus (-) buttons.
  • Drag a box on the map while holding down the Shift key.
  • Enter an address into the box below and click "Go!"

To find the drinking water service provider for a particular location, click on the map or enter a street address, city or zip code:
(Example: "1001 I Street, Sacramento, CA" or "95814")