The Environmental Protection Agency (EPA) is proposing to grant an extension of the "Serious" area attainment date for the Los Angeles-South Coast Air Basin ("South Coast") nonattainment area for the 2012 annual fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS or "standards") from December 31, 2025, to December 31, 2030, based on a proposed determination that the State has satisfied the statutory criteria for this extension. The EPA will accept comments on this proposed rule during a 30-day public comment period.
Source
https://www.federalregister.gov/documents/2026/06/11/2026-11736/attainment-date-extension-for-the-south-coast-california-2012-annual-pm25-fine-particulate-matterCanonical document at the regulator. Always cite this URL — not the Vantage detail page — in compliance evidence.