Oil and gas have contaminated groundwater in 17 percent of the 2,078 spills and slow releases that companies reported to state regulators over the past five years, state data show.
The damage is worse in Weld County, where 40 percent of spills reach groundwater, the data show.
Most of the spills are happening less than 30 feet underground — not in the deep well bores that carry drilling fluids into rock.
A journalist and lawyer, Bruce Finley has investigated local, national and international issues with on-site reporting in more than 40 countries. In his position as a staff writer for the Denver Post, he is focusing on environment-related news including water challenges, the oil and gas boom and wildfire.
