State officials say it's due to more reporting, not necessarily more spills.
The Environmental Protection Agency is taking heat over its new rules for power-plant pollution.
The Environmental Protection Agency is likely to get an earful in Denver this week as people testify on the agency’s plan to cut carbon emissions.
The alert is in effect through 4 p.m. on Tuesday.
Activists are pushing to bring their quest to limit oil and gas development to the voters.
The report says millions of people’s drinking water is at risk over the next few decades if demand continues to outpace the Colorado River’s water supply.
The Colorado Oil and Gas Conservation Commission announced Thursday that the well east of Greeley has been determined to be "potentially related" to two small earthquakes in May and June.
The governor spoke out a day after he abandoned the effort to find a legislative compromise to keep the measures off the November ballot.