County Affected:

Yuma County | View on a Map >

Nonattainment Area Designation Date:

June 4, 2018
(83 FR 25786)

Classification Level: 

Marginal

Pollutant of Concern:

Ozone (2015 standard; 70 ppb)

Summary: 

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 submitted a state implementation plan revision to address the statutory and regulatory requirements for marginal nonattainment areas under the 2015 standard on December 22, 2020.

Sources of Pollutant:

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

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