SIP Approval: Maryland (revisions to attainment plan for the Anne Arundel County and Baltimore County sulfur dioxide nonattainment area).

SIP Approval: California (approval of 2013 base-year emissions inventories and disapproval of motor vehicle emission budgets and attainment demonstration for the San Joaquin Valley 1997 annual fine particulate matter nonattainment area).

SIP Approval: Michigan (partial approval of attainment plan for the Detroit 2010 one-hour primary sulfur dioxide nonattainment area). 

SIP Proposal: Pennsylvania (revisions to attainment plan for the Allegheny County 2012 annual fine particulate matter nonattainment area). 

SIP Approval: Pennsylvania (attainment plan for the Allegheny, Pennsylvania, 2010 sulfur dioxide nonattainment area).

SIP Proposal: Indiana (revisions to attainment plan for the Southwest Indiana one-hour sulfur dioxide nonattainment area). 

SIP Approval: Ohio and West Virginia (attainment plans for the Steubenville, Ohio-West Virginia 2010 sulfur dioxide nonattainment area).

SIP Approval: Pennsylvania (attainment plan for the Beaver County 2010 sulfur dioxide nonattainment area).

SIP Proposal: Indiana (attainment plan for the Morgan County 2010 sulfur dioxide nonattainment area).

SIP Approval: Kentucky (attainment plan for the Jefferson County one-hour sulfur dioxide nonattainment area).