Butte County Air Quality Management Plans

This page last reviewed May 22, 2018


This page contains information regarding recent and historical SIP activity related to Butte County Air Quality Management District (District)
.   All documents are in Adobe (.pdf) format unless otherwise noted.


2017 Chico, CA/Butte County PM2.5 Redesignation Request and Maintenance Plan

The California Air Resources Board (CARB) will consider the Chico, CA/Butte County PM2.5 Redesignation Request and Maintenance Plan at a public hearing on November 16, 2017.  This Plan is being considered for submittal to the State Implementation Plan.


ARB Documents
  • Public Notice (November 16, 2017 CARB Board Hearing)
  • CARB Staff Report: Analysis of the Chico, CA/Butte County PM2.5 Redesignation Request and Maintenance Plan
District Documents
  • District Plan: Chico, CA/Butte County PM2.5 Redesignation Request and Maintenance Plan (link to pdf on District website) 
U.S. EPA Documents and Actions
  • Proposed Rule:  Approval and Promulgation of Air Quality State Implementation Plans; California; Chico Redesignation Request and Maintenance Plan for the 2006 24-hour PM2.5 Standard [EPA-R09-OAR-2018-0181; FRL-9977-77-Region-9] [83 FR 21238] 
  • Final Rule:  Determination of Attainment by the Attainment Date, Determinations of Failure to Attain by the Attainment Date and Reclassification for Certain Nonattainment Areas for the 2006 24-Hour Fine Particulate Matter National Ambient Air Quality Standards [EPA-R09-OAR-2016-0515; FRL-9962-25-OAR] [82 FR 21711] 


2012 Chico, CA/Butte County (partial) Planning Area PM2.5 Emission Inventory

At a public meeting held on October 18, 2012, the Air Resources Board (CARB) approved the Chico, CA/Butte County (partial) PM2.5 Emission Inventory submittal to the State Implementation Plan. The PM2.5 Emission Inventory was submitted to the U.S. EPA on November 15, 2012.  The information on this page provides links to ARB and District documentation, as well as U.S. EPA actions.

ARB Documents District Documents
    U.S. EPA Documents and Actions
    • Direct Final Rule:  Approval and Promulgation of Implementation Plans; California San Francisco Bay Area and Chico Nonattainment Areas; Fine Particulate Matter Emission Inventories [EPA-R09-OAR-2013-0599; FRL-9906-92-Region-9] [79 FR 14404] 
    • Final Approval:  Determination of Attainment for the Chico Nonattainment Area for the 2006 Fine Particle Standard; California; Determination Regarding Applicability of Clean Air Act Requirements [EPA-R09-OAR-2012-0800; FRL-9900-69-Region9] [78 FR 55225] 
    • Proposed Rule:  Determination of Attainment for the Chico Nonattainment Area for the 2006 Fine Particle Standard; California; Determination Regarding Applicability of Clean Air Act Requirements [EPA-R09-OAR-2012-0800; FRL-9746-9] [77 FR 65651]





    California State Implementation Plan

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