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Nogales | PM-2.5 Nonattainment Area

County Affected:

Parts of Santa Cruz County | View on a Map >

Nonattainment Area Designation Date:

Nov. 13, 2009
(74 FR 58688)

Classification Level: 


Pollutant of Concern:

PM2.5 (particulate matter 2.5 microns or less in diameter; 2006 standard)


The concentration of PM2.5 in the air in Nogales has been below federal standards for several years. ADEQ is developing a redesignation request so that EPA will reclassify the area as an attainment area. As part of this request, ADEQ must include an updated emissions inventory, modeling demonstration, strategy for Exceptional Events and rules for PM2.5 controls.

Sources of Pollutant:

  • On-road mobile (VOCs and NOx)
  • Non-point sources (VOCs)
  • Emissions from across the border

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