The Coloradoan reports that civil and environment engineering professor Ken Carlson led studies analyzing the impact of oil and gas drilling on groundwater in the 6,700-square-mile Denver-Julesburg Basin.
More than 30,000 active or abandoned wells for oil or natural gas sit on the basin.
Carlson says there is not a "chronic, the-sky-is-falling" problem with water contamination.
The study did find, however, that 2 percent of sampled wells showed the presence of methane. Methane can be explosive, but the university says it's not toxic and not a huge factor in terms of drinking water safety.
The team didn't find bariums, chromiums or other dangerous soluble contaminates.
You want to know what is really going on these days, especially in Colorado. We can help you keep up. The Lookout is a free, daily email newsletter with news and happenings from all over Colorado. Sign up here and we will see you in the morning!