EPA finalized rulemaking that narrows thresholds for Title V permitting programs under the Greenhouse Gas Tailoring Rule.

EPA established a federal implementation plan for Arizona, Arkansas, Florida, Idaho, Kansas, Oregon, and Wyoming because their SIPs fail to apply PSD requirements to sources of GHG emissions.

EPA determined that Arizona, Arkansas, Florida, Idaho, Kansas, Oregon, and Wyoming have failed to submit revisions to their EPA-approved SIPs to apply PSD requirements to GHG-emitting sources.

EPA deferred until August 31, 2011, the reporting deadline for year 2010 data elements that are inputs to emission equations under the Mandatory Greenhouse Gas Reporting Rule.

(new source review permitting requirements and exemptions)

SIP Approval: California (new source review permitting requirements and exemptions)

EPA finalized revisions to the primary and secondary NAAQS for lead and associated monitoring requirements.

EPA determined that the Dallas/Fort Worth moderate nonattainment area failed to attain the 1997 eight-hour ozone NAAQS and reclassified the area as a serious ozone nonattainment area; attainment must be reached no later than June 15, 2013.

EPA amended specific provisions in the GHG reporting rule to complement the final rule published on October 28, 2010.

United States v. Unisea, Inc., No. 3:11-cv-00037-JWS (D. Alaska Mar. 9, 2011). A settling CERCLA, CWA, and EPCRA defendant that discharged ammonia and other pollutants from its facility in Unalaska must pay a $1,405,250 civil penalty to the United States, must pay a $504,125 civil assessment to Alaska, and must perform the specified injunctive relief.