EPA Published Final Rule on Denver’s Attainment Demonstration for the 1997 8-Hour Ozone Standard

EPA published the Final Rule for Approval and Promulgation of State Implementation Plans; State of Colorado; Attainment Demonstration for the 1997 8-Hour Ozone Standard, and Approval of Related Revisions in the Federal Register, Vol. 76, No. 151, August 5, 2011.