Energy & environment · 02/11/2010
EPA Proposes Determinations of Attainment for Arizona Nonattainment Areas
The Environmental Protection Agency (EPA) has proposed determining that the Hayden, Nogales, and Paul Spur/Douglas nonattainment areas in Arizona met the National Ambient Air Quality Standard (NAAQS) for particulate matter (PM 10) by December 31, 1994, and are not currently attaining the standard, according to recent monitoring data.