EPA finalized amendments to the best available monitoring methods used for the petroleum and natural gas systems source category of the Greenhouse Gas Reporting Rule.

SIP Proposal: New Hampshire (GHG thresholds for PSD program).

SIP Proposal: Indiana (greenhouse gas (GHG) thresholds for PSD program).

United States v. City of Elkhart, No. 2:11CV328 (N.D. Ind. Sept. 6, 2011). A settling CWA defendant that discharged untreated sewage from its combined sewer collection system into waters of the United States must pay an $87,000 civil penalty to the United States and Indiana and must upgrade and expand its sewage collection, storage, conveyance, and treatment system at a cost of approximately $155.6 million by no later than July 1, 2033. 

EPA Region 6 announced that it will not reissue a NPDES general permit for the final beneficial reuse or disposal of municipal sewage sludge in Louisiana.

EPA Region 2 determined that adequate facilities for the safe and sanitary removal and treatment of sewage from all vessels are reasonably available for the New York State areas of the Long Island Sound.

EPA withdrew the federal aquatic life water quality criteria applicable to certain waters of the Great Lakes system in Wisconsin in favor of state-designated criteria. 

EPA released a final report entitled, Aquatic Ecosystems, Water Quality, and Global Change: Challenges of Conducting Multi-Stressor Vulnerability Assessments.

EPA announced the establishment of a federal Underground Injection Control Class VI Program for carbon dioxide geologic sequestration wells. 

EPA and the National Highway Traffic Safety Administration finalized rules to establish a comprehensive program to reduce greenhouse gas emissions and fuel consumption for on-road heavy-duty vehicles that will go into effect with the 2014 model year.