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Yuma | Ozone Nonattainment Area

County Affected:

Yuma County | View on a Map >

Nonattainment Area Designation Date:

June 4, 2018
(83 FR 25786)

Classification Level: 


Pollutant of Concern:

Ozone (2015 standard; 70 ppb)


The concentration of ozone in the air in Yuma is frequently above the 2015 ozone standard. EPA designated a portion of Yuma County as marginal nonattainment for the 2015 Ozone National Ambient Air Quality Standards (NAAQS) on June 4th, 2018. ADEQ is working on a SIP that will be submitted to the EPA in August 2020.

Sources of Pollutant:

  • Industrial solvents and coating use (VOCs)
  • Residential/industrial fuel combustion (VOCs and NOx)
  • Cars and trucks (VOCs and NOx)
  • International and Interstate Transport

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