SIP Proposal: Maine (limited maintenance plans for the Portland and Midcoast 1997 ozone areas).

SIP Proposal: West Virginia (maintenance plan for the West Virginia portion of the Parkersburg-Marietta, West Virginia-Ohio 1997 eight-hour ozone area).

SIP Approval: Wisconsin (second maintenance plans for the Kewaunee County, Door County, Manitowoc County, and Milwaukee-Racine 1997 ozone areas). 

SIP Proposal: Wisconsin (second maintenance plans for the Kewaunee County, Door County, Manitowoc County, and Milwaukee-Racine 1997 ozone areas). 

SIP Proposal: Pennsylvania (reasonably available control technology determinations for the 1997 and 2008 eight-hour ozone NAAQS).

SIP Approval: Michigan (second limited maintenance plans for seven 1997 ozone areas).

SIP Approval: Massachusetts (interstate transport requirements for the 1997, 2008, and 2015 ozone NAAQS).

EPA set deadlines for California to submit an extreme ozone nonattainment area plan for the Coachella Valley 1997 eight-hour ozone nonattainment area and to submit revisions to the new source review and Title V rules applicable to the area.

SIP Approval: Indiana (maintenance plan for the 1997 ozone NAAQS).

SIP Proposal: Michigan (second limited maintenance plans for seven 1997 ozone attainment areas).