Northern Sierra Air Quality Management District Plans

This page last reviewed November 20, 2017


This page contains information regarding State Implementation Plan (SIP) activity related to the Northern Sierra Air Quality Management District (District) which comprises the counties of Nevada, Plumas, and Sierra. The information on this page provides links to ARB, District, and U.S. EPA  documentation. (Unless otherwise noted, documents are in .pdf format.)


Plumas County 


2017 Portola PM2.5 State Implementation Plan (2017 Plan)


The Board approved the supplemental transportation conformity budgets for 2019 and 2022 at its October 26, 2017 public meeting.  In addition, CARB approved the Portola Fine Particulate Matter (PM2.5) Attainment Plan (Plan) on February 16, 2017 as a revision to the State SIP.  

CARB Documents
  • Public Notice (October 26, 2017 CARB Board Hearing)
  • Staff Report: CARB Staff Report Supplemental Transportation Conformity Emission Budgets for the Portola Fine Particulate Matter (PM2.5) Attainment Plan

District Documents

Portola Wood Stove Change-Out Program


The Greater Portola Wood Stove Change-out Program (Program) was established to assist the District in meeting commitments in the 2017 Plan.  Progress reports on the Program are transmitted to U.S. EPA on an annual basis.

2016 Progress Report



preload