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Public Notice: Proposed Determination of Attainment; West Central Pinal County, AZ, 24-Hour Fine Particulate Matter NAAQS

Publish Date: 04/25/2019

Summary

EPA is proposing to determine that the West Central Pinal County nonattainment area attained the 2006 24-hour national ambient air quality standard (NAAQS) for particulate matter with a diameter of 2.5 micrometers or smaller (PM2.5 or “fine particulate matter”) by December 31, 2017, the statutory attainment date for the area. The proposal is based on the three-year average of annual 98th percentile 24-hour concentrations for the 2015-2017 period, using complete, quality-assured, and certified PM2.5 monitoring data.

Action

Proposed Rule

Dates

Written comments must arrive on or before May 28, 2019.

For Further Information Contact

Jerry Wamsley (wamsley.jerry@epa.gov), EPA Region IX, (415) 947-4111

Applicant or Respondent

State of Arizona

Docket Number: 

Federal Register Citation: