Hickenlooper Signs Executive Order For Low Emissions Vehicle StandardsColorado's governor has ordered his state to adopt California's vehicle pollution rules, joining other states in resisting the Trump administration's plans to ease up on emission standards.
Clean Air Group Says Denver Improving On OzoneOzone pollution has improved in both Denver and Fort Collins, but both cities are still among the 15 worst in the nation, the American Lung Association said.
2 Colorado Coal-Fired Power Units To Close In Clean-Air DealColorado officials say one coal-fired power plant will shut down and a part of a second plant will stop operating under an agreement to reduce haze and carbon dioxide.
Clean Air Funding Tussle Dominates Colorado Senate Budget DebateA partisan tussle over the Obama administration's stalled clean power plan dominated early debate as Colorado's Republican-led Senate on Wednesday considered a $27 billion state budget.
Colorado Attorney General Cynthia Coffman Joins Lawsuit Over Clean Air RulesColorado Attorney General Cynthia Coffman says she's joining other states in a lawsuit challenging President Barack Obama's Clean Power Plan.
Hickenlooper Rejects GOP Call To Ignore EPA Coal RulesColorado Gov. John Hickenlooper is rejecting a call by Senate Majority Leader Mitch McConnell to defy new federal pollution controls on coal-burning power plants, despite the state's heavy reliance on coal.
Deal Would Put Coal-Fired Lamar Plant On StandbyA coal-fired power plant in Lamar would be put on standby under a proposed settlement with the environmental group WildEarth Guardians, which alleged the plant repeatedly violated the Clean Air Act.
Reddy Ice To Pay $61,500 Fine For Denver FacilityEnvironmental regulators say Dallas-based Reddy Ice Corp. has agreed to pay $61,500 to settle allegations of deficiencies at the ice maker's facility in north Denver.
Outdoor Air Quality: Is America Suffocating Itself?This spring, runny eyes and a stuffed up nose may not be the result of seasonal allergens.
Polis Introduces Oil, Gas Drilling BillU.S. Rep. Jared Polis has introduced a bill that he says would close a loophole in federal law that exempts oil and gas drilling from certain provisions of the federal Clean Air Act.
Group Seeks Court Review Of Colorado Haze PlanAn environmental group is asking a federal appeals court to review part of Colorado's plan for cutting air pollution and haze.
EPA Holds Hearing In Denver On Oil And Gas RulesThe energy industry asked the Environmental Protection Agency on Wednesday to take more time to rethink its proposed rules for limiting air pollution at oil and gas wells.
State Health: Arapahoe County Likely Broke Law By Dumping PaintThe Colorado Department of Public Health and Environment has notified Arapahoe County Commissioners that a county crew may have violated state laws and regulations when they dumped gallon after gallon of road striping paint.
Health Investigators Descend On Illegal Dump Site, County Promises ActionInvestigators sought out and found the site where it appears hundreds of gallons of road striping paint was dumped by a county public works crew.
CBS4 Investigation Exposes Illegal Dumping By Arapahoe CountyA CBS4 investigation has uncovered Arapahoe County Public Works employees illegally pumping hundreds, maybe thousands of gallons of paint.