Rule lifecycle · DOCKET:EPA-R09-OAR-2026-2608
Determination of Attainment by the Attainment Date and Clean Data Determination for the 2012 Annual Fine Particulate Standard; Plumas County, California
Environmental Protection Agency — observed across 2 documents over 91 days. Use the source documents below before deciding whether this affects your business.
In plain English
Plumas County, California officially met the EPA's air quality standards for tiny pollution particles by the required deadline, demonstrating that the region's air is clean enough. Business owners in the county should review whether they can now reduce air-quality monitoring costs or pollution-control expenses given the improved status.
First seen
May 14, 2026
Last seen
Aug 13, 2026
Latest stage
Rule
PRORULE → RULE
91d
Effective on
Monday, September 14, 2026
Stage timeline
Proposed·May 14, 2026·91 FR 27224
Determination of Attainment by the Attainment Date and Clean Data Determination for the 2012 Annual Fine Particulate Standard; Plumas County, California
comments close Jun 15, 2026#2026-09604
Final·Aug 13, 2026·91 FR 52249
Determination of Attainment by the Attainment Date and Clean Data Determination for the 2012 Annual Fine Particulate Standard; Plumas County, California
effective Sep 14, 2026#2026-16510