SIP Approval: Massachusetts (infrastructure requirements for the 2012 fine particulate matter NAAQS).

SIP Approval: Oregon (infrastructure requirements for the 2015 ozone NAAQS).

SIP Proposal: Illinois (update to state board requirements and related infrastructure requirements).

SIP Proposal: Nebraska (infrastructure requirements for the 2015 ozone NAAQS).

SIP Proposal: Texas (infrastructure requirements for the 2015 ozone NAAQS).

SIP Approval: Maine (infrastructure requirements for the 2010 sulfur dioxide NAAQS).

SIP Proposal: Maryland (infrastructure requirements for the 2015 ozone NAAQS).

SIP Proposal: New Mexico (infrastructure requirements for the 2015 ozone NAAQS and repeal of state regulations for total suspended particulate).

SIP Proposal: Idaho (infrastructure requirements for the 2015 ozone NAAQS).

SIP Approval: Kentucky (minor source infrastructure requirements for the 2010 nitrogen dioxide, 2010 sulfur dioxide, and 2012 fine particulate matter NAAQS).