Well Completion Reports

Submit a Well Completion Report

California Water Code Section 13751 requires that anyone who constructs, alters, or destroys a water well, cathodic protection well, groundwater monitoring well, or geothermal heat exchange well must file with the Department of Water Resources a report of completion within 60 days of the completion of the work. Drillers submit their well completion reports with the Online System of Well Completion Reports (OSWCR, say "Oscar"). OSWCR users create an account based on their C-57 license that DWR will validate. Upon approval users will be able to submit Well Completion Reports.

Click here to submit a Well Completion Report

Public Access to Well Completion Reports

California Water Code Section 13752 allows for the release of copies of well completion reports to governmental agencies and to the public. DWR has redacted the personal information from the approximately 800,000 reports on file. They are available online at no charge via a web mapping application here:

Well Completion Report Map Application

If you are unable to find reports of interest using this application, Department staff can process your request, but a fee may be charged as provided by the law. If you are interested in requesting well completion reports instead of using the free online access, please fill out and submit a Well Completion Report Request Form.


For maps of regions and a list of counties that each office supports, see the Integrated Regional Water Management Technical Assistance page.

Northern Region
April Scholzen
Water Resources Tech. II
2440 Main Street
Red Bluff, CA 96080
530-529-7368 (office)
530-529-7322 (fax)


North Central Region
Haley Hattendorf
Water Resources Engineer
Groundwater Supply Assessment & Special Studies Section
3500 Industrial Blvd
West Sacramento, CA 95691
916-376-9614 (office)
916-376-9676 (fax)

South Central Region
Chris Guevara
Water Resources Tech. II
3374 East Shields Avenue
Fresno, CA 93726
559-230-3356 (office)
559-230-3301 (fax)

Southern Region
Michael Van Raalte
Groundwater Section
770 Fairmont Avenue, #102
Glendale, CA 91203
818-549-2307 (office)

DWR Headquarters

Well Completion Reports/OSWCR
Ben Brezing
Engineering Geologist
901 P Street
P.O. Box 942836
Sacramento, CA 94236