Determination of Attainment by the Attainment Date; 2006 24-Hour Fine Particulate Matter National Ambient Air Quality Standard; Pinal County, Arizona
air-emissions · Rule · Published 2019-10-03 · Effective 2019-11-04 · AZ · 84 FR 52766
Document
Document number
2019-21206
Federal Register citation
84 FR 52766
CFR reference
40 CFR 52
Type
Rule
Action
Final rule.
Category
air-emissions
Publication date
2019-10-03
Effective date
2019-11-04
State
AZ
EPA docket
EPA-R09-OAR-2019-0068
Abstract
The Environmental Protection Agency (EPA) is taking final action 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 (PM<INF>2.5</INF> or "fine particulate matter") by December 31, 2017, the statutory attainment date for the area. This final action 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 PM<INF>2.5</INF> monitoring data.