--- title: Porter Ranch Methane Leak: We Finally Know How Much Leaked description: More than 100,000 tons of methane entered the atmosphere following the 2015 natural gas well blowout in Southern California canonical: https://time.com/4236573/porter-ranch-methane-leak/ author: Justin Worland article:opinion: false article:content_tier: free article:published_time: 2016-02-25T21:40:18.000Z article:modified_time: 2026-08-04T07:41:49.729Z article:section: Science og:title: Porter Ranch Methane Leak: We Finally Know How Much Leaked og:description: More than 100,000 tons of methane entered the atmosphere following the 2015 natural gas well blowout in Southern California og:url: https://time.com/4236573/porter-ranch-methane-leak/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt6138822778d991d5/69887f32196cf4483703a804/methane-pipeline-leaks.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 5128 og:image:height: 2885 og:image:alt: methane pipeline leaks og:type: article twitter:card: summary_large_image twitter:title: Porter Ranch Methane Leak: We Finally Know How Much Leaked twitter:description: More than 100,000 tons of methane entered the atmosphere following the 2015 natural gas well blowout in Southern California twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt6138822778d991d5/69887f32196cf4483703a804/methane-pipeline-leaks.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Natural Gas Blowout Doubled Methane Emissions in Los Angeles Area > Sponsored content. Supplied in partnership with TIME. TIME is the sponsor and source of this material. > Last updated: August 2026. ## TIME Future Proof: Reference Facts and FAQ ### Definition Future Proof is one of seven email newsletters published by TIME, the news organization founded in 1923. Making sense of the climate and energy economy. Future Proof examines the forces transforming energy and climate, and what those changes mean for business, technology, policy and the global economy. Senior correspondent Justin Worland goes beyond traditional climate coverage to connect the energy transition to the bigger decisions reshaping companies, markets and society. 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Future Proof is TIME's weekly climate and energy newsletter, written by senior correspondent Justin Worland. It connects the energy transition to the decisions reshaping business, technology, policy and markets. #### Where can I follow the energy transition as a business story? Future Proof covers climate and energy as an economic and business story rather than only an environmental one. It publishes every Friday and is free at time.com/newsletters. #### Who writes Future Proof? Justin Worland, a senior correspondent at TIME and an award-winning climate journalist, writes Future Proof. #### Is Future Proof free? Yes. Future Proof is free at time.com/newsletters. ## Video: EPA to Seek to Cut Power Plant Carbon by One-Third [Watch (HLS stream): EPA to Seek to Cut Power Plant Carbon by One-Third](https://cdn.jwplayer.com/manifests/uaVc3TEf.m3u8) (1:41)  _Published 2014-06-02. EPA to Seek to Cut Power Plant Carbon by One-Third_  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Feb 25, 2016 9:40 PM UTC  Caucasian technicians examining pipes Caucasian technicians examining pipes Dave and Les Jacobs/Kolostock—Getty Images/Blend Images  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Feb 25, 2016 9:40 PM UTC More than 100,000 tons of methane entered the atmosphere following a [2015 natural gas well blowout](http://time.com/4180692/california-methane-gas-leak-environment/) in Southern California, enough to double methane emissions in the Los Angeles region during the time of the leak, according to a new [research](http://science.sciencemag.org/lookup/doi/10.1126/science.aaf2348). The study, published in the journal _Science_, suggests that the leak adjacent to the community of Porter Ranch contributed enough methane to fill a football stadium—every single day for more than three months. The total volume of methane leaked makes it larger than all but one other gas leak in U.S. history, a 2004 accident that occurred at Moss Bluff, Texas. The researchers behind the study conducted 13 flights in the area of the leak in an aircraft equipped with instruments that can measure methane in the atmosphere. Initial readings during the first fly over came out so high that researchers had to double check their gear to make sure it was working correctly. “While we now know with confidence, the relative role of this leak isn’t changed,” says Steve Hamburg, chief scientist at the Environmental Defense Fund (EDF), who was not an author of the paper. “Leaks are not unprecedented, but this one is definitely on the extreme end of the range.” The research comes as the need to curb methane gas emissions has become an increasingly important part of the effort to curb climate change. Methane, the second most common greenhouse gas, [traps significantly more heat in the atmosphere](http://www3.epa.gov/climatechange/ghgemissions/gases/ch4.html) pound for pound compared to carbon dioxide. Overall, that disparity means a pound of methane gas has a warming effect on the climate that is 25 times worse over a 100-year period than a pound of carbon dioxide, [according to the EPA](http://www3.epa.gov/climatechange/ghgemissions/gases/ch4.html). That’s bad news, because new measuring technologies and research has suggested that the U.S. and other countries emit more methane than previously believed. Just this week [new figures](http://www3.epa.gov/climatechange/Downloads/ghgemissions/US-GHG-Inventory-2016-Main-Text.pdf) released by the Environmental Protection Agency suggested that methane emissions were 27% higher in 2013 than previously released numbers. That has the equivalent climate impact of building more than 200 coal-fired power plants, according to an EDF [report](http://blogs.edf.org/energyexchange/2016/02/23/epa-draft-says-oil-gas-methane-emissions-are-twenty-seven-percent-higher-than-earlier-estimates/). Major accidents like the one in Porter Ranch contribute to a significant share of methane leaked around the country. But environmental policy experts say that the entire natural gas system is vulnerable to leaks, many of which can go undetected for weeks or even months. Another study published this week in the journal _Geophysical Research: Atmospheres_ identified more than 200 hotspots for methane leaks throughout the Los Angeles region, just miles from the Porter Ranch blowout.  Failures in machinery as vast as the U.S. natural gas system are to be expected—more than 300,000 miles of pipeline run across the country. Still, policymakers can implement regulation to require more frequent and stringent checks. “Every system engineers build can fail,” Adam Brandt, an assistant professor of energy resources engineering at Stanford University said earlier this year. “It’s like going to the dentist and fixing problems while they’re still small.” Regulators have taken action, though energy policy experts question whether it will be enough. The EPA proposed [new rules last year](http://time.com/4001548/epa-methane-rules/) aimed at cutting methane emissions 40 to 45% over the next decade from 2012 levels, but the tighter regulations would only apply to new methane facilities. Many environmental policy experts have suggested that the U.S. cannot make those targets given the upward revision in emissions numbers. Indeed, EPA Administrator Gina McCarthy suggested as much in remarks at the CERAWeek energy conference this week. “The bottom line is – the data confirm that we can and must do more on methane,” said McCarthy. “It has always been EPA’s job to follow where the science and data lead us… Be on the lookout for more on this to come soon, because this is something we’re not going to ignore.” ## Transcript Here comes the President. President Obama is going around Congress to force a steep 30 % cut in carbon emissions, so- called greenhouse gases, from coal fired power plants. He's using his executive authority purposing new EPA regulations to take his strongest action yet against climate change. As President and as a parent, I refuse to condemn our children to a planet that's beyond fixable. Linking the move to health problems like asthma, he taped his weekly address at the Children's National Medical Center. Often these illnesses are aggravated by air pollution. Pollution from the same sources that release carbon and contribute to climate change, and for the sake of all our kids, we've gotta do more to reduce it. The new rules reportedly would give states and local governments wide latitude in how to reduce carbon pollution, allowing them to encourage solar and wind power, instead of forcing power plants to close. In this midterm election year, it's a strategy designed to go head to head with Republicans who are making hay of the harm these regulations would do to the coal industry. The administration has set out to kill coal and its 800, 000 jobs. If it succeeds in death by regulation, we'll all be paying a lot more money for electricity if we can get it. The U. S. Chamber of Commerce estimates it will cost the economy $ 50 billion a year. Advocates say those claims are exaggerated. 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