DOGGR 2017. http://www.conservation.ca.gov/dog/Pages/Wellfinder.aspx.
This website is no longer valid, as the California Department of Conservation, Division of Oil, Gas and Geothermal Resources (DOGGR) was changed to 
California Geologic Energy Management Division (CalGEM) in January 2020. The new website is https://www.conservation.ca.gov/calgem/Pages/WellFinder.aspx.
The same information is provided, with a different website name.