California officials ordered an emergency shutdown of 11 oil and gas waste injection sites in Kern County earlier this month, fearing they may be contaminating sources of drinking water that are sorely needed in the drought-stricken state.
No contamination has actually been found in any drinking or irrigation water, but, according to The Bakersfield Californian, “Pollution has not been ruled out… as regulators conduct site inspections and await test results and other information from the companies” that were operating the injection sites.
State officials are reviewing not just the 11 wells that were ordered to be shut down but as many as 100 more in northeast and east Bakersfield, CA over fears that fracking fluids and “produced waters” (the toxic and potentially radioactive fluids that come up with oil) may be leeching into potential sources of potable water.
As ProPublica reported, California's Division of Oil and Gas and Geothermal Resources issued the shutdown orders on July 7 to seven different energy companies, saying that they may have injected wastewater into aquifers that could be a source of drinking water, which “poses danger to life, health, property, and natural resources.”
A review of wastewater injections sites is long overdue in California. The state had exempted as many as 100 aquifers from environmental protection after they were found to contain water unfit for consumption or to be too deep to make their use feasible. But a 2011 report released by the U.S. Environmental Protection Agency found significant shortcomings with how the state was managing its wastewater injection program:
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