EPA Proposes Redesignation of Pinal County, Arizona Area for PM10 Nonattainment

Summary

The Environmental Protection Agency (EPA) is proposing to redesignate the western half of Pinal County, Arizona, as a nonattainment area for the 1987 national ambient air quality standard for particles with an aerodynamic diameter less than or equal to 10 micrometers (PM10), based on numerous recorded violations at various monitoring sites within the county.

Original source language: Federal Register — Environmental Protection AgencyOpen original release →

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