EPA entered into a proposed settlement agreement in WildEarth Guardians v. Jackson, No. 3:10-cv-04603-WHA (N.D. Cal.), that establishes a deadline for the Agency to take action on NAAQS for Arizona, Nevada, Pennsylvania, and Tennessee.

EPA designated four new equivalent methods for monitoring ambient air quality.

EPA announced completion of its statutory requirement to promulgate emission standards under the CAA.

The CEQ issued instructions to federal agencies for integrating climate change adaptation into their policies and practices as required under Executive Order No. 13514, Federal Leadership in Environmental, Energy, and Economic Performance.

EPA entered into a proposed consent decree under the CAA requiring it to respond to a petition seeking the Agency's objection to a CAA Title V operating permit issued by the New Mexico Environment Department to Williams Four Corners LLC for the Sims Mesa Central Delivery Point facility by April 29, 2011.

EPA issued a final rule requiring GHG monitoring and reporting from facilities that conduct geologic sequestration of carbon dioxide.

EPA proposed to withdraw certain aquatic life water quality criteria for waters of the Great Lakes in Wisconsin.

EPA proposed revisions to the unregulated contaminant monitoring regulation for public water systems.

OSM proposed to approve an amendment to Pennsylvania's regulatory program under SMCRA concerning limitations for post-mining discharges.

OSM proposed to approve an amendment to Pennsylvania's regulatory program under SMCRA that would remove a required amendment on regulatory exemptions for coal extraction incidental to the extraction of other minerals.