(AP file photo/Keith Srakocic)

Environmental groups threaten lawsuit over drilling wastewater rules

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Under existing federal law, the Environmental Protection Agency is obligated to review and possibly revise regulations governing the handling of oil and gas waste every three years. But the agency’s last review was 27 years ago.
David Green, software architect, is shown at Baker Hughes, 11211 FM 2920 Road, Thursday, Aug. 6, 2015, in Tomball. ( Melissa Phillip  / Houston Chronicle )

Service companies see re-fracking as new opportunity

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Re-fracking can be up to two-thirds cheaper than drilling a new well, which is an alluring possibility for cash-strapped U.S. producers who are straining to keep operational costs down and drilling operations intact.
A jar holding waste water from hydraulic fracturing is held up to the light at a recycling site in Midland, Texas. (AP Photo/Pat Sullivan)

Report details which chemicals are being used in California fracking fluids

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More distinct chemicals were used during hydraulic fracturing operations at California oil wells than nationwide, the report shows.
(AP Photo/Brennan Linsley)

Geologists: Drilling slowdown cuts number of Kansas quakes

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In the past year there have been 67 earthquakes emanating from Harper and Sumner Counties with a magnitude of at least 3.0, including one measured at 4.9 in November, the U.S. Geological Survey said.
Oklahoma Gov. Mary Fallin gestures as she talks with the media after meeting with members of the Coordinating Council on Seismic Activity, in Oklahoma City, Tuesday, Aug. 4, 2015. (AP Photo/Sue Ogrocki)

Panel says ending Oklahoma earthquakes will take research, time

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Gov. Mary Fallin urged homeowners concerned about the safety of their homes to purchase private earthquake insurance.
A jar holding waste water from hydraulic fracturing is held up to the light at a recycling site in Midland, Texas. (AP Photo/Pat Sullivan)

EPA to block drillers from sending wastewater to municipal treatment plants

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The oil and gas industry faces winnowing options for getting rid of the wastewater that flows out of wells, as the EPA moves to block municipal treatment facilities from accepting it and earthquake fears prompt some states to restrict underground disposal.
A well is drilled at an Apache Energy site in the Permian Basin in Midland, Texas, Feb. 14, 2012. (Jim Wilson/The New York Times)

An Illinois company wants to use fracking technology to clean up groundwater in Nebraska

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Archer Daniels Midland Co. plans to inject emulsified iron and vegetable solutions under high pressure into the ground to help remove lingering contaminants, including carbon tetrachloride, that have been there for decades.
(AP Photo/Brennan Linsley)

Federal drilling rules deferred until September

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Federal District Court Judge Scott Skavdahl had already decided to temporarily stay the Interior Department rule while he waits for more information from the government and weighs an oil industry request for a longer-term injunction blocking the drilling mandates.
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In this Tuesday, Feb. 24, 2015, photo, an activist waves a placard calling for the ban of fracking during a news conference outside the Colorado Convention Center in Denver. (AP Photo/David Zalubowski, File)

Ballot fight over fracking could be shaping up in Colorado

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Frank McNulty, a Republican former state lawmaker who sponsored a pro-industry ballot measure in 2014, expects fracking opponents to turn to voters next year.
Workers tend to a wellhead during a hydraulic fracturing operation at an Encana Oil & Gas (USA) Inc. gas well outside Rifle, in western Colorado.  (AP Photo/Brennan Linsley)

Most of California’s fracking waste left in unlined pits, study finds

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The California Council on Science and Technology study presents a cautious assessment of fracking in the state. And it’s not likely to defuse the political fight over fracking, with both the oil industry and its opponents on Thursday claiming vindication in its findings.