The Water Quality Control Commission amended 5 Colo. Code Regs. §1002.31, Basic Standards and Methodologies for Surface Water. Changes outline requirements for the Commission to grant temporary modification to numeric standards and delay consideration of nutrient criteria until March 2012. In addition, the Commission altered standards for a number of state rivers and basins. Changes take effect August 16, 2011. http://www.sos.state.co.us/CCR/Upload/AGORequest/AdoptedRules02011-00111.RTF.