This dataset includes the number of service connections, categorized by type and metering status, as submitted by public water systems via the electronic annual report (eAR) in sections 3 or 4 for calendar years 2013 through 2023 reporting year. It also includes facility public information details from the SDWIS database as metadata associated to the dataset.

“Service connection” means the point of connection between the customer’s piping or constructed conveyance, and the water system’s meter, service pipe, or constructed conveyance.

“Public water system” means a system for the provision of water for human consumption through pipes or other constructed conveyances that has 15 or more service connections or regularly serves at least 25 individuals daily at least 60 days out of the year.

Public water systems submit critical water system information intended to assess the status of compliance with specific regulatory requirements such as source water capacity, provides updated contact and inventory information (such as population and number of service connections) to the to the Division of Drinking Water using the electronic Annual Report (eAR) submission process.

The data in the datasets below are electronically reported annually by public water systems to the State Water Resources Control Board - Division of Drinking Water. The data contained herein are public water system reported data and do not include a determination of accuracy or validity by regulatory staff. For data validated by regulatory staff, refer to the public water system inventory dataset from the Safe Drinking Water Information System (SDWIS), available at: https://data.ca.gov/dataset/drinking-water-public-water-system-information.

For more information about the eAR, visit the eAR Home Page: https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/ear.html