Geothermal Resources

Geothermal Energy Pie Chart

Geothermal energy comes from heat stored in rocks and fluid in the Earth’s crust. Geothermal fluids may be steam or hot water. With more than 650 active, high-temperature (fluids over 212 degrees F) wells that tap into geothermal fields, California is the largest generator of electricity from geothermal energy in the United States. In 2017, the state received 5.7 percent of its electrical energy from geothermal resources.

The Division of Oil, Gas, and Geothermal Resources (DOGGR) regulates production and injection wells used for the discovery and extraction of geothermal resources on state and private land. By overseeing the drilling, operation, maintenance, and permanent closure of these wells, DOGGR supports development of this clean, renewable energy resource while protecting life, property, and underground and surface water. 


Active Rulemaking

Discussion Draft. The DOGGR geothermal staff and Department of Conservation legal and regulatory staff have reviewed and assessed the public feedback and are developing documentation for a formal regulations draft. 

Current Geothermal Statutes and Regulations

Additional Information

Frequently Asked Questions (FAQs) and Facts

GIS Mapping

Geothermal Data

Geothermal Technical Reports

For Operators

DOGGR recently conducted two workshops for geothermal operators. One session focused on geothermal project compliance with the California Environmental Quality Act (CEQA) and DOGGR's role in CEQA. Compliance documentation, indemnity agreements, project descriptions, and acceptable CEQA submittals and examples were discussed. A second session covered blowout prevention equipment (BOPE) requirements for high temperature hydrothermal geothermal resources and DOGGR Publication Instruction Manual No. M07, PT2, Section 4.

Requirements, Records, and Related Information