EPA is taking final action to find that the Reno (Washoe County) Planning Area (RPA) has not attained the annual and 24-hour PM- 10 national ambient air quality standards (NAAQS) by the Clean Air Act (CAA) mandated attainment date for moderate nonattainment areas, December 31, 1994. This finding is based on monitored air quality data for the PM-10 NAAQS during the years 1992-1994. As a result of this failure to attain, the RPA will be reclassified under CAA section 188(b)(2) by operation of law as a serious nonattainment area on the effective date of this rule. The State of Nevada will be required to submit a state implementation plan (SIP) revision addressing the CAA provisions for serious areas within 18 months of the reclassification.