Text Size
Increase text size
Increase text size
Banner

Recent and Pending Reviews

Recent and Pending Water Quality Classifications and Standards Hearings

 

Recent EPA Actions Regarding Colorado Water Quality Standards

  • June 5, 2014 EPA Action pdf file  approving discharger specific variance provisions in the Basic Standards and Methodologies for Surface Water, Regulation #31 
  • September 16, 2013 EPA action pdf file  approving four sets of revisions to water quality standards in multiple segments throughout the State adopted by the Water Quality Control Commission June 13, 2011, November 5, 2012, January 1, 2013 and May 13, 2013.
  • July 16, 2013 EPA action pdf file   approving revisions to standards for organic chemicals in the Basic Standards and Methodologies for Surface Water, Regulation #31
  • July 16 2013 EPA action pdf file    approving revisions for a portion of Wildhorse Creek (Lower Arkansas segment 2c) in the Arkansas River Basin, Regulation #32
  • June 20, 2013 EPA action pdf file  approving multiple sets of temporary modifications for arsenic 
  • June 7, 2013 EPA action pdf file   approving emergency revisions to segment 22 in the South Platte River Basin, Regulation #38 
  • October 15, 2012 WQCC Response to EPA Partial Disapproval pdf file  of the 2012 revisions to the Basic Standards and Methodologies for Surface Water, Regulation #31 
  • December 8, 2011 EPA action partially disapproving the 2010 revisions to the Basic Standards and Methodologies for Surface Water, Regulation #31 
  • September 28, 2011 EPA action approving three sets of revisions to water quality standards in multiple segments throughout the State adopted by the Water Quality Control Commission in February 2010, July 2010 and January 2011
  • August 22, 2011 WQCC response to June 17, 2011 EPA action disapproving the total phosphorus standard for Bear Creek Reservoir in the South Platte River Basin, Regulation #38
  • August 4, 2011 EPA action partially approving the 2010 revisions to the Basic Standards and Methodologies for Surface Water, Regulation #31
  • June 17, 2011 EPA Action disapproving the total phosphorus standard for Bear Creek Reservoir in the South Platte River Basin, Regulation #38
  • March 17, 2010 EPA Action approving the water quality standards revisions to multiple segments of the South Platte River Basin, Regulation #38
  • December 23, 2008 EPA Action approving the water quality standards revisions to multiple segments of the Upper and Lower Colorado River Basins, Regulations #33 and #37
 

 


Your opinion is important to us.  If you have comments regarding this information, or wish to have additional information included, please email us at cdphe.wqcc@state.co.us.