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Welcome to the Division of Oil, Gas & Geothermal Resources

The Division oversees the drilling, operation, maintenance, and plugging and abandonment of oil, natural gas, and geothermal wells. The regulatory program emphasizes the wise development of oil, natural gas, and geothermal resources in the state through sound engineering practices that protect the environment, prevent pollution, and ensure public safety.

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Underground Injection Control (UIC) News and Information


DOC Sends Out Public Notice of Proposed Regulations for Aquifer Exemption Compliance Schedule

The California Department of Conservation (DOC) has sent out public notice of proposed regulations for the aquifer exemption compliance schedule related to the Underground Injection Control (UIC) program managed by the Division of Oil, Gas, and Geothermal Resources. The public notice begins the formal rulemaking process and marks the beginning of a 45-day public comment period. The proposed regulations are necessary to ensure that the State’s federally-approved UIC program for Class II injection wells meets the requirements of the federal Safe Drinking Water Act, and protects public health, safety and the environment in an efficient manner.

These regulations were adopted on a temporary basis by emergency rulemaking on April 20. This rulemaking action is to complete the formal rulemaking process in order to keep these regulations in place.

Comments regarding the proposed regulations can be submitted until 5:00 p.m. on July 13, 2015 via email to; via FAX to (916) 324-0948; or via regular mail to the Department of Conservation, 801 K Street, 24-02, Sacramento, CA 95814, ATTN: Aquifer Exemption Compliance Schedule Regulations.

Comments will also be taken at two public hearings around the state:

Bakersfield – July 15, 4:00 p.m. – 7:00 p.m. Bakersfield Marriott at the Convention Center, 801 Truxtun Avenue.

Santa Maria – July 16, 4:00 p.m. – 7:00 p.m. Santa Barbara County Supervisors Hearing Room, 511 East Lakeside Pkwy.

Documents related to the Department of Conservation’s rulemaking efforts can be found here.


On April 2, 2015, the Department of Conservation noticed its intent to propose the adoption of emergency regulations necessary to protect public health, safety and the environment, and to bring California’s Class II Underground Injection Control program into compliance with the federal Safe Drinking Water Act. This action was taken in accordance with Government Code sections 11346.1 and 11349.6 of the California Administrative Procedures Act. These regulations were approved by the Office of Administrative Law (OAL) on April 20, 2015, and are now in effect.

To access the Notice of Proposed Emergency Rulemaking Action and the Text of the Proposed Emergency Regulations, please click here.

EPA Correspondence and Guidance Documents

On Friday, May 15, the Division of Oil, Gas, and Geothermal Resources of the Department of Conservation and the State Water Resources Control Board sent an update to the U.S. Environmental Protection Agency on the State agencies’ ongoing corrective review of underground injection well information. The objective of the review has been to identify wells that may have been improperly permitted to inject produced fluids into non-hydrocarbon producing, non-exempt aquifers. This update focuses particular attention on those wells that may have the highest risk to California aquifers from contamination due to oil and gas production.

Division, State Water Board, and US EPA Aquifer Exemption Workshops

Joint workshops conducted by the Division, the State Water Board, and the US EPA were held in Bakersfield and the L.A. Basin. These workshops were intended to provide a brief history of the State’s primacy delegation from US EPA, as well as an outline of the data requirements and process for requesting an aquifer exemption under the Safe Drinking Water Act. All three agencies provided short presentations regarding their specific role, and were available to answer general questions about the aquifer exemption application process.

Copies of the presentations by the three agencies are found below:

List of potential wells under review regarding Aquifer Exemptions

The link below is to a list of issued well permits that may currently have a corresponding well injecting into an aquifer potentially needing an aquifer exemption, pursuant to the US EPA’s request.
This list is best understood as a list of well permits, rather than wells. Wells can be proposed and permitted without ever being drilled or converted to an injection well. Even where a well has been drilled, it may already have been plugged and abandoned or issued other orders preventing injection. Determining the current status of the wells listed here is part of the Division’s February 6, 2015, response to the US EPA. This list was generated by identifying one or both of the following characteristics:
  • The permit is for a well located outside the productive limits of a field as those limits were identified in the State’s Primacy application to the US EPA;
  • The permit is for a well injecting within the productive limits but into multiple zones, one of which may not be exempted by the Memorandum of Agreement (MOA) with the US EPA. The Division acknowledges that many of these wells may not need an aquifer exemption, but a formal determination cannot be made until an evaluation, of the specific well(s) and injection zone(s), is completed.

Please note that the evaluation of these well permits has begun and the list continues to change. However, to be consistent with the US EPA’s letter to the Division dated December 22, 2014, and the Division’s response on February 6, 2015, the list contains the permitted wells into non-hydrocarbon producing zones as of August 2014, and a list of the enhanced oil recovery permitted wells as of October 2014. The Division will update the list periodically.
The 176 wells listed below are those wells that were permitted to dispose of water, according to our records, into non-exempt, non-hydrocarbon producing zones with a water quality of sub 3,000 mg/l total dissolved solids (TDS). These wells are a subset of the 2,553 wells, and a subset of the 532 wells list under disposal. Please note that many of the wells have been removed from the list for various reasons, and those wells are shown in green. In addition, those wells that have been shut-in via order or official request are shown in grey. Please note that wells on this list may or may not be injecting into the zone indicated and are only on the list because at some point in time they had been permitted to inject.

Update on the Memorandum of Agreement (MOA) with the United States Environmental Protection Agreement (EPA)

There are two competing versions of the September 29, 1982 Memorandum of Agreement between the Division of Oil, Gas and Geothermal Resources and the United States Environmental Protection Agency. California’s primacy delegation was made based on one or both of versions of this document. Some related documentation is also included.

More Information on the UIC program can be found here.

Well Stimulation/SB 4 News and Information

Draft Environmental Impact Report for Well Stimulation in California Released

On January 14th, the Department of Conservation, through its Division of Oil, Gas and Geothermal Resources, published a Draft Environmental Impact Report (EIR) titled “Analysis of Oil and Gas Well Stimulation Treatments in California.”

Senate Bill 4 requires the Division to prepare an Environmental Impact Report (EIR) pursuant to the California Environmental Quality Act (CEQA) in order to provide the public with detailed information regarding any potential environmental impacts associated with well stimulation treatments in California.

The public review period for this Draft EIR began on January 14, 2014 and will end on March 16, 2015. Comments on the Draft EIR may be submitted and must be received in writing on or before March 16, 2015. During the comment period, the Department and the Division will conduct six public comment meetings throughout the state to receive verbal and written comments on the Draft EIR.

To access the Draft EIR and detailed information on how to provide comments, click here.

Independent Science Study on Well Stimulation Released

Pursuant to Senate Bill 4, the California Natural Resources Agency (CNRA) commissioned the California Council on Science and Technology (CCST) and Lawrence Berkeley National Laboratory (LBNL) to conduct an independent scientific assessment of well stimulation, including hydraulic fracturing, in California. On January 14, 2015, CCST released Volume I of the assessment to the public.

Volume I, which is titled "An Independent Scientific Assessment of Well Stimulation Technologies in California: Well Stimulation Technologies and their Past, Present, and Potential Future Use in California", provides the factual basis describing what well stimulation treatments (WST) are, how they are conducted in general and practiced in California, and where they have been and are being used for oil and gas production in the state.

To view or download the report, please visit the CCST website at:

The full independent scientific assessment will be issued in three volumes. Volumes II and III will be released in July 2015. Volume II will assess the potential impacts of WST with respect to water, air quality, and greenhouse gas emissions, as well as induced seismicity, ecology, traffic and noise. And Volume III will present case studies to assess environmental issues and qualitative hazards for specific geographic regions, based on findings in Volume I and Volume II.

Permanent Regulations for Well Stimulation Finalized

On December 30, 2014, the Office of Administrative Law (OAL) approved and filed the final proposed regulations on well stimulation treatments with the Office of the Secretary of State. Documents associated with the rulemaking process, including the final text of the regulations, OAL's approval letter, and the Final Statement of Reasons, can be found here.

"Well stimulation' practices are defined by Senate Bill 4 (Pavley, Ch 313, Stats of 2013) and include hydraulic fracturing (commonly known as "fracking") and other treatments that increase the flow of oil and natural gas to wells and then to the surface for recovery. The regulations, which are to go into effect on July 1, 2015, are designed to protect health, safety, and the environment, and supplement existing strong well construction standards. They address a comprehensive list of issues, including testing, monitoring, public notice, and permitting.

The final regulations were developed over a twelve-month period and are the result of consideration of extensive public input and consultation with other state regulatory agencies. The Department of Conservation made the proposed regulations and revisions thereto available for public comment from November 15, 2013 until January 14, 2014; from June 13, 2014 until July 28, 2014; and from October 9, 2014 until October 24, 2014. During those public comment periods the Department conducted a total of ten public comment hearings around the state. In addition, as required under Public Resources Code section 3160, subdivision (b), the Division of Oil, Gas, and Geothermal Resources developed these regulations in consultation with various other state regulatory agencies.

More background information about the regulations can be found here.

Readopted SB 4 Interim Well Stimulation Regulations Now in Effect

On June 27, 2014, a readoption of the SB 4 interim well stimulation treatment regulations was filed with the Secretary of State. The interim regulations, which first went into effect on January 1, 2014, were adopted by emergency rulemaking to ensure that essential implementing regulations were in effect when Senate Bill 4 became effective. The final text of the readopted SB 4 interim well stimulation treatment regulations and other rulemaking documents can be found here.

DOC's implementation of SB 4 also includes:

  1. Development of an environmental impact report (EIR) by July 1, 2015. Find out more about the EIR development here.
  2. Web-based posting of public notices about well stimulation permits applied for and issued by the Division of Oil, Gas and Geothermal Resources. Find current well stimulation certifications here.

New Well Search Tools Available

Well Finder LogoThe Division of Oil, Gas, and Geothermal Resources has two new online tools that make finding information about California wells more convenient. The Division's Well Finder application shows every known oil and gas well in the state. Users can search for a well in a variety of ways and view production information, the well record, and notice/permit information, including whether the Division has been notified that well stimulation is being used.

Also now online is the Division's Interim Well Stimulation Treatment Notices Index, which allows users to view forms submitted by oil and gas operators to the Division about well stimulation operations, as required by the interim regulations supporting SB 4.


The Division of Oil, Gas, and Geothermal Resources Issues a New Notice to Operators
(Posted 5/19/2015)

To view the most recent Notice to Operators please click here.

Senate Bill 1281, New Water Reporting Requirement for Oil and Gas Operators
(Posted 12/08/2014)

Senate Bill (SB) 1281 was signed into law by Governor Brown on September 25, 2014. Effective January 1, 2015, this law among other things, requires oil and gas operators to submit quarterly water reports detailing the source, quality, and treatment of all waters used for injection, disposal, and other oil and gas field activities. To read State Oil and Gas Supervisor Dr. Steven R. Bohlen’s notice to operators, click here. For more information on SB 1281, click here.

2013 Annual Report Information
(Posted 10/01/2014)

The following information is now available from the 2013 Annual Report of the State Oil & Gas Supervisor:
- Oil and Gas Production by County
- The Financial Statement (fiscal year 2013-2014)
- Delinquent Assessments
These reports are available in accordance with Section 3108, Division 3 of the Public Resources Code, which states: "On or before the first day of October of each year the supervisor shall make public for the benefit of all interested persons a report in writing showing
a) The total amount of oil and gas produced in each county
b) The total cost of the division for the previous fiscal year
c) The total amount of delinquent and uncollected from any assessments or charges levied pursuant to the chapter."

2013 Preliminary Annual Report Released
(Posted 6/25/2014)

The 2013 Preliminary Annual Report of California Oil, Gas, and Geothermal production is now posted. Click here to view/download.

The Division of Oil, Gas, and Geothermal Resources Issues a New Notice to Operators
(Posted 6/24/2014)

To view the most recent Notice to Operators please click here.

DOGGR Announces New Assessment Rate
(Posted 6/09/2014)

The Oil and Gas Assessment rate for fiscal year 2014-2015 is 28.63572 cents per barrel of oil or 10 Mcf of natural gas produced, an increase of 14.36889 cents from the previous fiscal year. The increase in the assessment is required to implement recent legislative mandates regarding well stimulation.

Governor Brown has appointed the new Oil and Gas Supervisor
(Posted 6/03/2014)

The Division of Oil, Gas, and Geothermal Resources is pleased to welcome the new Oil and Gas Supervisor, Steven Bohlen.

Pre 1977 Production and Injection scanned documents can be found here.
(Posted 5/22/2014)

The Division of Oil, Gas, and Geothermal Resources Issues a New Notice to Operators
(Posted 5/15/2014)

To view the most recent Notice to Operators please click here.

2013 Outstanding Field and Lease Facility Maintenance Award

(Posted 4/9/2014) (Updated 8/5/2014)

The Division of Oil, Gas and, Geothermal Resources (Division) is pleased to announce the following Outstanding Field and Lease Facility Maintenance Award recipients for 2013:

  1. Santa Maria Energy, LLC, Orcutt Oil Field, "Careaga" lease
  2. Ample Resources, Inc., Temescal Oil Field, "Temescal" lease
  3. Mammoth-Pacific, L.P., Casa Diablo Geothermal Field, "MPI" lease

The Division congratulates these operators on being selected for the 2013 Lease Awards. To see pictures of award winners and for additional Lease Award information, please click here.

Lease Award Nominations
(Posted 2/19/2014)

The applications for the 2014 lease award are due October 1. DOGGR management will still select the award winners, but will use more stringent eligibility and judging criteria.

Click here for revised program information and application materials.

DOC Sends Out Notice to Operators Regarding New Assessment Payee and Mailing Address
(Posted 1/30/2014)

The California Department of Conservation sent out a Notice to Operators (NTO) with updated payee and mailing address information . The NTO can be found here.

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