2021-22167: Rescission of Clean Data Determination and Call for Attainment Plan Revision for the Yuma, AZ 1987 PM10 Moderate Nonattainment Area
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On June 1, 2021, the Environmental Protection Agency (EPA) published in the Federal Register a proposal to rescind our previously issued clean data determination for the Yuma, Arizona "Moderate" nonattainment area for the 1987 24-hour national ambient air quality standard (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10</INF>). We also proposed to find that the Arizona State Implementation Plan (SIP) is substantially inadequate to attain or maintain the PM<INF>10</INF> standard and to therefore issue a "SIP call" requiring Arizona to revise the SIP to address this inadequacy. Due to an administrative oversight, the contents of the rulemaking docket were not available for the full 30-day comment period. Therefore, the EPA is re-opening the comment period for the proposed rule for an additional 30 days. Furthermore, in response to a letter received during the initial comment period, we are also specifically seeking comment regarding the appropriate attainment date for the Yuma PM<INF>10</INF> nonattainment area.
The agency’s own summary, as published.
What this changes
Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.
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