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. 

The Bureau of Ocean Energy Management, Regulation, and Enforcement proposed amendments that require operators to develop and implement additional provisions in their safety and environmental management systems programs for oil, gas, and sulphur operations in the outer continental shelf. 

United States v. Links at Columbia, LP, No. 2:11-cv-04232-NKL (W.D. Mo. Aug. 31, 2011). Settling CWA defendants that violated NPDES stormwater permit requirements at a residential development in Columbia, Missouri, must pay a $430,000 civil penalty. 

The Bureau of Ocean Energy Management, Regulation, and Enforcement increased the maximum daily civil penalty assessment for OCSLA violations to $40,000 and the maximum daily civil penalty assessment for violations of its financial responsibility regulations to $30,000.

EPA approved 11 alternative testing methods for use in measuring the levels of contaminants in drinking water.

DOE amended until no later than December 31, 2012, the compliance dates for manufacturers to submit certification reports for commercial refrigeration equipment; commercial heating, ventilating, air- conditioning equipment; commercial water heating equipment; and automatic commercial ice makers under the Energy Policy and Conservation Act of 1975.

DOE adopted energy conservation standards for residential furnaces and for residential central air conditioners and heat pumps. 

vUnited States v. Western Reman Industrial Inc., No. 11-cv-00008 (N.D. Ind. Jan. 10, 2011). A settling CERCLA defendant responsible for violations at the former Grissom Air Force Base in Peru, Indiana, must pay $300,000 in past and future U.S. response costs incurred at the site.

United States v. Lookout Mountain Mining & Milling Co., No. 11-0029 (D. Idaho Jan. 25, 2011). Settling CERCLA defendants responsible for violations at the Bunker Hill Mining and Metallurgical Complex Superfund site in northern Idaho must assign their interest in insurance policies to a trust and must pay 2% of net smelter returns from future activities.