EPA is approving a portion of a State Implementation Plan (SIP) submittal from the State of New Mexico to address Clean Air Act (CAA or Act) requirements that prohibit air emissions which will contribute significantly to nonattainment or interfere with maintenance in any other state for the 2006 fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS). EPA has determined that the existing SIP for New Mexico contains adequate provisions to prohibit air emissions from significantly contributing to nonattainment or interfering with maintenance of the 2006 24-hour PM<INF>2.5</INF> NAAQS (2006 PM<INF>2.5</INF> NAAQS) in any other state as required by the Act.