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4th Maximum Ozone Values Table (ppb) through July 22nd, 2018

Click here to view current table The Denver Metro/North Front Range area is designated as nonattainment by the U.S. Environmental Protection Agency (EPA) for the pollutant ozone. The 2015 8-Hour Ozone Standard is 70 parts per billion (ppb) and is...

EPA Concurs with Colorado 2017 Wildfire Exceptional Events for Ozone

On July 11, 2018, EPA notified the State of Colorado of concurrence with a request to exclude ozone data influenced by wildfire exceptional events in September 2017.  These events resulting in several monitors exceeding the 2008 ozone standard on September 2 and 4,...

RAQC Sends Letter to Governor Hickenlooper

The RAQC Board sends a letter to Governor Hickenlooper urging him to ask the Air Quality Control Commission to initiate a rulemaking process to explore the adoption of the Advanced Clean Car Standards in Colorado.  The RAQC encouraged the Governor to aggressively...