"The rate of groundwater contamination due to natural gas leakage from听oil and gas wells has remained largely unchanged in northeastern Colorado鈥檚 Denver-Julesburg Basin since 2001, according to a new University of Colorado Boulder study based on public records and historical data.
The results also suggest that microbially-generated methane, rather than high-volume hydraulic fracturing, is the primary source of dissolved methane present in the area鈥檚 groundwater. Old and faulty oil and gas wells contribute a smaller percentage, with the risk of groundwater contamination due to a leak estimated to be between 0.12 percent of all the water wells in the region to 4.5 percent of the water wells that were tested.
The new findings were published听July 11th 2016听in the journal听Proceedings of the National Academy of Sciences."
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