California oil and gas regulations are administered primarily by the Geologic Energy Management Division (CalGEM) within the Department of Conservation, and they cover every stage of a well’s life: permitting, drilling, construction, integrity testing, idle-well management, injection, reporting, and permanent plugging. On top of those operational rules, California enforces a 3,200-foot health and safety setback around homes, schools, and medical facilities, bans new hydraulic fracturing permits, and can impose civil penalties of up to $70,000 per violation per day.
Who Regulates Oil and Gas Operations in California
CalGEM is the agency with day-to-day supervision of oil, gas, and geothermal wells statewide. Its authority is set in the Public Resources Code, which formally designates it as the “Geologic Energy Management Division in the Department of Conservation.”1California Legislative Information. California Public Resources Code 3000-3017 – Definitions and General Provisions The agency handles permitting, inspections, integrity testing, idle-well oversight, and enforcement, and it administers California’s Underground Injection Control program for oil-and-gas-related (Class II) wells under authority delegated by the EPA in 1983.2U.S. Environmental Protection Agency. EPA Oversight of California’s Underground Injection Control (UIC) Program The EPA keeps final review authority over aquifer exemptions.
Permits and Well Construction Standards
No operator can drill, rework, or deepen a well without CalGEM’s approval. The operator files a Notice of Intention to Drill New Well, or a Rework/Supplementary Notice for modifications, and cannot begin work until CalGEM approves the application.3Legal Information Institute. California Code of Regulations Title 14 Section 1963 – Notice to Drill New Well or Convert Existing Well The submission has to include engineering plans showing how the well will be built safely.
Cementing rules are strict and specific. Surface casing must be cemented from the bottom of the casing shoe all the way to the surface. Intermediate and production casings need cement extending at least 500 feet above any oil, gas, or abnormal-pressure zone and at least 100 feet above the base of any freshwater zone.4Legal Information Institute. California Code of Regulations Title 14 Section 1722.4 – Cementing Casing District deputies can require cement bond logs or temperature surveys to verify the seal, and a failed primary cement job means re-cementing before the operator moves on.
The 3,200-Foot Health Protection Zone
Senate Bill 1137 created “health protection zones” extending 3,200 feet from the property line of any sensitive receptor, defined to include residences, schools, childcare facilities, hospitals, and similar locations. CalGEM cannot approve a notice of intention to drill a new well or permanently alter the casing of an existing well inside that zone. The narrow exceptions cover plugging and abandonment, response to threats to public health or the environment, and compliance with a court order.5California Legislative Information. California Public Resources Code 3281
Existing wells inside a health protection zone are not grandfathered out of everything. Starting January 1, 2025, operators must keep nighttime noise at or below ambient levels, minimize light spilling past property boundaries, control dust and particulates, and post community complaint contact information on the perimeter of the site.6California Legislative Information. SB 1137 – Oil and Gas Operations, Sensitive Receptors An industry referendum effort to block the law was dropped in 2024.7Governor of California. California Beats Big Oil – Again
Fracking Ban and 2045 Phase-Out
California no longer issues new hydraulic fracturing permits. Governor Newsom directed CalGEM in April 2021 to open rulemaking ending new fracking permits, and the ban took full effect on October 1, 2024.8Governor of California. Governor Newsom Takes Action to Phase Out Oil Extraction in California CalGEM can no longer approve permits for hydraulic fracturing or other high-intensity well stimulation techniques.
The same 2021 directive asked the California Air Resources Board to analyze pathways to phase out all oil extraction in the state by 2045. That target is being incorporated into CARB’s Climate Change Scoping Plan. It is a policy directive rather than a statutory mandate, so specific enforcement mechanisms are still developing.
Well Integrity Testing
Testing schedules depend on how a well is used. Underground gas storage wells require temperature and noise logs at least once a year, a casing wall thickness inspection at least every 24 months, and pressure tests on the production casing on a schedule CalGEM approves.9Legal Information Institute. California Code of Regulations Title 14 Section 1726.6 – Mechanical Integrity Testing If casing corrosion will compromise pressure capacity within two years, the operator has to remediate before any injection or withdrawal resumes.
Injection wells used for wastewater disposal or enhanced oil recovery follow a separate schedule: a casing pressure test before injection starts, then at least every five years afterward. Gas disposal wells face annual casing tests.10Legal Information Institute. California Code of Regulations Title 14 Section 1724.10.1 – Mechanical Integrity Testing Part One – Casing Integrity Any failed test has to be reported to CalGEM immediately, and the well stays offline until the agency issues written approval to resume.
Idle Well Fees and Management Plans
A well that sits inactive can deteriorate and leak. California charges escalating annual fees the longer a well stays idle:
- Less than 3 years idle: $1,000 per year
- 3 to under 8 years: $2,500 per year
- 8 to under 15 years: $5,000 per year
- 15 to under 20 years: $12,500 per year
- 20 years or longer: $22,500 per year, rising to $60,000 for wells idle 25 years or more beginning January 1, 2029
Fees are due by May 1 each year. As an alternative, an operator can file a management plan with CalGEM covering up to eight years that schedules idle wells for either return to production or plugging and abandonment. The plan must prioritize wells by age, proximity to sensitive receptors, and any threat to life, health, or natural resources.11California Legislative Information. California Public Resources Code 3206
Operators must also conduct integrity and fluid-level testing on idle wells to confirm they are not leaking. A well idle for 15 years or more requires an engineering analysis showing it is still viable to return to production. If the operator can’t remediate or demonstrate viability, CalGEM can order the well plugged. Failing to comply with idle-well requirements at all counts as conclusive evidence that the well has been deserted, giving CalGEM direct authority to order abandonment.12California Legislative Information. California Public Resources Code 3206.1
Plugging, Abandonment, and Bonds
When a well is permanently done producing, the operator must plug and abandon it to CalGEM’s satisfaction. The plugging job has to isolate all oil-bearing and gas-bearing formations, protect underground and surface water suitable for irrigation or domestic use, and prevent future damage to life, health, property, or natural resources.13California Legislative Information. California Public Resources Code 3208 In practice, cement plugs are placed at multiple intervals in the wellbore to seal each geological zone, and surface production facilities are decommissioned.14Legal Information Institute. California Code of Regulations Title 14 Section 1723 – Plugging and Abandonment – General Requirements
Before drilling, redrilling, deepening, or permanently altering casing, an operator must post an indemnity bond:
- Wells under 10,000 feet deep: $25,000 per well
- Wells 10,000 feet or deeper: $40,000 per well
The bond is filed with the notice of intention, must be backed by an authorized surety company, and guarantees compliance with Division 3 of the Public Resources Code plus any enforcement costs the state incurs.15California Legislative Information. California Public Resources Code 3204 CalGEM can require additional security beyond these base amounts when an operator poses a heightened risk of deserting wells or threatening natural resources.
Production and Water Reporting
Operators file monthly production reports with CalGEM for every well they own or operate. Each report has to show the oil, gas, and water produced from each well; how many wells are drilling, producing, injecting, or idle; and what happened to the gas and water, including the names of anyone the gas was delivered to. Operators also have to disclose the source of any water used in operations, the volume suitable for domestic or irrigation use, and the specific disposal method for all water generated by their activities.16California Legislative Information. SB 1281 – Oil and Gas Production, Water Use Water-related data, including treatment and recycling of produced water, is reported quarterly.
Penalties for Noncompliance
CalGEM enforces through inspections, data audits, and escalating consequences. When an operator falls out of compliance, the agency usually starts with a compliance order or Notice of Violation directing a fix. If that doesn’t work, the matter can be referred for civil penalties or criminal prosecution.
Civil penalties are tiered:
- Standard violations: up to $50,000 per violation per day, dropping to a maximum of $25,000 per day if the operator can show the violation did not harm or seriously threaten human health, property, or the environment, and was not chronic.
- Noncompliance with a CalGEM order: up to $50,000 per day of continued noncompliance.
- Intentional or negligent violations: up to $70,000 per violation per day.
- False statements in permits, reports, or records: up to $70,000 per violation per day.
Civil penalties are assessed through the Attorney General or a local prosecutor after referral by CalGEM’s supervisor.17California Legislative Information. California Public Resources Code 3236.2
Obstructing a CalGEM inspection, failing to submit required reports, or filing a fraudulent report is a separate misdemeanor. Conviction carries a fine between $500 and $5,000, up to six months in jail, or both.18California Legislative Information. California Public Resources Code 3236 The most serious situations threatening life, health, or the environment can be referred for criminal prosecution through a district attorney, city attorney, or the Attorney General.