FWS announced a 90-day finding on a petition to list 42 Great Basin and Mojave Desert springsnails as threatened or endangered under the ESA; the agency found that listing may be warranted for 32 of the species and initiated a status review. 

FWS announced a 90-day finding on a petition to list the Franklin's bumble bee as endangered and to designate critical habitat under the ESA; the agency found that listing may be warranted and initiated a status review. 

FWS announced a 12-month finding on five petitions to list seven species of Hawaiian yellow-faced bees as endangered and to designate critical habitat under the ESA; the agency found that listing is warranted but precluded by higher priority actions.

FWS announced a 90-day finding on a petition to list the snowy plover as endangered or threatened and to reclassify the wintering population of piping plover as endangered under the ESA; the agency determined that action is not warranted for either species. 

FWS announced a 12-month finding on a petition to list the Franciscan manzanita as endangered under the ESA and to designate critical habitat; the agency found that listing is warranted but that critical habitat is not determinable at this time. 

The president proclaimed September 2011 as National Wilderness Month. 

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.