EPA Reproposes to Redesignate Tucson Air Planning Area for Carbon Monoxide Attainment and Approve Maintenance Plan

Summary

The Environmental Protection Agency (EPA) is seeking public comment on a proposal to redesignate the Tucson Air Planning Area in Arizona for carbon monoxide (CO) attainment and approve a maintenance plan to ensure the area remains in compliance with the CO National Ambient Air Quality Standard (NAAQS). This proposal is a follow-up to the original proposal submitted on July 22, 1998, and includes additional information submitted by the Pima Association of Governments (PAG) and new issues raised since the original publication.