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GAMA - Well Owners - Water Quality in Private Domestic Wells


If you are looking for records pertaining to a water well completion report (well log) you have two options:

1) Contact your local city or county environmental health department that issues well drilling permits and request a copy. A list of environmental health department permitting agencies can be found here (

2) If your city or county health department does not have a copy, the Department of Water Resources (DWR) maintains an online database of well logs for approximately 800,000 wells statewide. DWR has redacted personal information from the well logs (name and address of well owner). The well logs are available at no charge from the Well Completion Report Map Application

If you are unable to find your well log using the online application, DWR staff can process your request manually but you may be charged a fee for the service. Well log requests can be filed using the Well Completion Report Request Form to DWR.


Domestic well water is typically used by single family homeowners for private use and consumption. It is the responsibility of the well owner to ensure that their domestic well water is safe, since the State of California does not regulate domestic well water quality.

You may have concerns about the water from your domestic well. The information provided on this topic is divided into the following areas to help you find important information about domestic wells:

For more information on public drinking water systems visit the Division of Drinking Water (DDW) Program website  or contact a DDW Water District.

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State Water Resources Control Board
Division of Water Quality
Groundwater Ambient Monitoring & Assessment Program (GAMA)
1001 I Street, 15th Floor
Sacramento, CA 95814

Telephone: (916) 341-5577
Fax: (916) 341-5463