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Yuma | Particulate Matter (PM-10) Nonattainment Area

County Affected:

Yuma County | View on a Map >

Nonattainment Area Designation Date:

Nov. 6, 1991
(56 FR 56694)

Classification Level: 

Moderate

Pollutant of Concern:

PM10 (particulate matter 10 microns or less in diameter; 1987 standards)

Summary: 

The concentration of PM10 in the air in the Yuma PM10 nonattainment area (NAA) is frequently above federal standards. On May 17, 2022, EPA took final action to rescind its previously issued clean data determination for the Yuma, Arizona, moderate NAA for the 1987 24-hour PM10 national ambient air quality standard (NAAQS). In addition, EPA determined that the Arizona State Implementation Plan (SIP) is substantially inadequate to attain or maintain the PM10 standard in the Yuma NAA and called for Arizona to revise the SIP to address this inadequacy (SIP Call). Lastly, EPA finalized a maximum attainment date of Dec. 31, 2027, for the Yuma NAA | View Federal Register >

ADEQ is currently developing a nonattainment SIP revision to address EPA’s SIP Call for the Yuma NAA. The plan revision will include an updated emissions inventory, modeling demonstration, strategy for exceptional events, and rules for PM10 controls. The Yuma NAA SIP revision is due on Nov. 17, 2023.

Sources of Pollutant:

  • Unpaved roads
  • Construction
  • Windblown dust
  • Unpaved farm roads
  • Emissions from across the border 

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