Approval and Promulgation of Air Quality Implementation Plans; State of Idaho; Northern Ada County Carbon Monoxide Redesignation to Attainment and Designation of Areas for Air Quality Planning Purposes

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On January 17, 2002, the State of Idaho requested EPA to redesignate the Northern Ada County "not classified" carbon monoxide (CO) nonattainment area to attainment for the CO National Ambient Air Quality Standard (NAAQS) and submitted a CO maintenance plan for Northern Ada County. In this action, EPA is approving the maintenance plan and redesignating the Northern Ada County CO nonattainment area to attainment.