CHEYENNE, Wyo. (AP) — The Wyoming governor's office is looking into possibly requiring petroleum companies that drill for oil and gas in Wyoming to test the local groundwater for any pollution before they sink a drill bit into the ground.
The goal would be to make it easier to pinpoint the source of any groundwater contamination that turned up during or after drilling. That could help any homeowners with contaminated well water to find out if oil or gas drilling in their area caused the problem or if the water pollution came from some other source.
Gov. Matt Mead looks to implement a groundwater testing requirement by the end of this year, said his natural resources adviser, Jerimiah Rieman.
"Most of the large operators do it but not all operators do it. It really can protect citizens, protect the state, protect the industry," Rieman said Monday.
Either the Wyoming Oil and Gas Conservation Commission, which oversees oil and gas development in the state, or the Wyoming Department of Environmental Quality, the state agency that enforces pollution laws, would adopt and implement the regulation.
The governor's office is looking to new regulations in Colorado as a possible template.
The Colorado Oil and Gas Conservation Commission on Jan. 7 approved requiring companies to sample up to four water wells within half a mile of a drilling site before drilling. Two more rounds of testing would occur between six and 12 months and five and six years after drilling. No other state requires groundwater monitoring before and after drilling.
The governor's office is wrapping up its look at what Colorado has done and other states are considering. Next, it will assess whether the commission or DEQ would be the better agency to enforce groundwater testing in Wyoming, Rieman said.
In northeast Wyoming, some people have blamed drilling for coal-bed methane for lowering their water table. Wyoming might require companies to note the volume of water flowing in water wells near oil and gas wells.
"We might add that element in after we look at it a bit further," Rieman said.
In theory, baseline groundwater testing could have helped landowners in the Pavillion area who blame recent gas drilling for petrochemicals in their well water. A 2011 U.S. Environmental Protection Agency report found chemical traces in the groundwater that it linked to hydraulic fracturing. State regulators and Encana, which operates the Pavillion gas field, dispute the conclusion, which has not yet been formally review by outside experts.
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