Oil & Natural Gas Production, Processing, and Storage

This page last reviewed May 11, 2018

This is the main webpage for the Oil & Gas Methane Regulation, intended to reduce methane emissions from crude oil and natural gas operations.  For questions related to the program, please contact Jim Nyarady at (916) 322-8273.

Oil & Gas Methane Regulation Implementation and Enforcement

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Oil & Gas Methane Regulation Development


"Enhanced Inspection & Maintenance for GHG and VOCs at Upstream Facilities," SAGE Environmental Consulting, December 2016

"Source Testing of Fugitive and Vented Emissions from Hydraulic Fracturing Operations and Wastewater Ponds Used in Crude Oil and Natural Gas Operations in California," SAGE Environmental Consulting, June 2016

Because of a limited sample size, this report did not estimate greenhouse gas, criteria pollutant, or toxic air contaminant emissions from well stimulation treatments.  However, an uncontrolled step in the well stimulation process was discovered: uncovered circulation tanks.  This source is being addressed in the proposed Oil & Gas Methane Regulation.

This study also examined a set of oil field produced water ponds.  These ponds may or may not have held produced water from a well that had been stimulated.  Regardless, no well stimulation chemicals were detected, but methane, carbon dioxide, non-methane hydrocarbon, and toxic air contaminant emissions were measured.  Again, due to a small sample size, ARB is proposing a new research study to get additional data from ponds, before deciding whether or not to proceed with possible control measures.

Recirculation Tank Emissions Testing, WSPA, October 2015

Methane and Carbon Dioxide Emissions from California Oil and Gas Operations, CSU Fullerton, June 2011

Crude Oil and Natural Gas Industry Survey


Local Air District Rules

For California air district rules and regulations regarding reduction of criteria pollutants, please see the District Rules Database.