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Company Behind Methane Leak Is Ordered to Offset the Climate Damage
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Date:2025-04-18 17:46:49
California Gov. Jerry Brown ordered Southern California Gas Co. to pay for a mitigation program to offset damage to the world’s climate from a massive methane leak at an underground natural gas storage facility in Los Angeles.
The directive was part of Brown’s Jan. 6 declaration of a state of emergency. The ongoing leak has caused more than 2,300 people to evacuate their homes and forced school closures in the Porter Ranch neighborhood of northwest Los Angeles. Brown’s proclamation also directed state agencies to protect public health and safety, oversee efforts to stop the 12-week-old leak and ensure that SoCal Gas is held accountable for costs and any violations.
“The California Air Resources Board, in consultation with appropriate state agencies, shall develop a program to fully mitigate the leak’s emissions of methane by March 31, 2016,” the governor ordered. The program “shall be funded by the Southern California Gas Company, be limited to projects in California, and prioritize projects that reduce short-lived climate pollutants,” Brown said in the proclamation.
The leak, in the Aliso Canyon, is the largest known emissions source of its kind and comes during a growing realization of the magnitude of methane emissions associated with the oil and gas industry and the critical role that the gas plays in global warming, said Mark Brownstein, vice president of the climate and energy program at the Environmental Defense Fund (EDF).
“This is such a dramatic case that almost by definition it’s going to break new ground in terms of our understanding of the challenge that is in front of us, from a regulatory standpoint, and from a business practice standpoint,” Brownstein said. “It will also likely break new ground on what’s expected of companies if and when these problems occur.”
Since Oct. 23, a ruptured natural gas well that is part of one of the country’s largest underground natural gas storage facilities has leaked more than 80,000 metric tons of methane into the atmosphere. The well’s cumulative emissions equal approximately 2 percent of all natural gas industry emissions nationwide over the course of a year, said Anthony Marchese, a mechanical engineer at Colorado State University in Fort Collins.
Natural gas is composed primarily of methane, a potent greenhouse gas that, in the first two decades after it is released, is 84 times more effective at trapping heat in the atmosphere than carbon dioxide. The Aliso Canyon leak is currently leaking the equivalent of the emissions of six coal-fired power plants or 4.7 million automobiles each day, according to EDF. The well will most likely continue spewing methane into the atmosphere for another month or more before it can be plugged.
The nation’s entire oil and gas industry currently leaks more than 7 million tons of methane a year, not counting the ongoing Aliso Canyon leak. The effect that these numerous, smaller leaks have on climate change over a period of 20 years is equal to that of 160 coal-fired power plants over the same time period, according to an EDF calculation based on Environmental Protection Agency data. Oil and gas companies are not required to fund mitigation efforts for climate damage from these smaller leaks, but environmentalists say the size of the current leak in Los Angeles could change how regulators view all emissions.
It’s not entirely clear what statutory or regulatory authority the state of California has to require SoCal Gas to pay, Brownstein said.
Officials with the gas company said that while their current focus is stopping the leak, they plan to comply with the governor’s order.
“SoCal Gas reaffirms our prior commitment to mitigate the environmental impact of the actual amount of natural gas released from the leak,” said Kristine Lloyd a company spokeswoman, in a written statement. “We look forward to working with state officials to develop a framework that will achieve this goal.”
The mitigation program will probably include efforts to plug many smaller leaks in the company’s natural gas distribution system, according to EDF’s Brownstein.
“This event is a watershed moment both because it drives home for the general public the fact that these kinds of problems can and do exist, and hopefully it drives home for the industry that a business-as-usual approach is no longer tenable,” Brownstein said.
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