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Summary of Sandpoint PM-10 Limited Maintenance Plan


Sandpoint, Idaho was designated as a moderate PM-10 nonattainment area upon enactment of the Clean Air Act (CAA) Amendments of 1990.

Idaho submitted an attainment plan to EPA on August 16, 1996, as a moderate PM10 State Implementation Plan (SIP) under section 189(a) of the CAA. The EPA approved the Sandpoint moderate PM10 SIP on June 26, 2002 (67 FR 43006 (PDF)(8 pp, 164 K,About PDF)).

On December 14, 2011, Idaho submitted a PM10 Limited Maintenance Plan and Redesignation Request. The December 14, 2011 SIP submittal included a request to approve revisions to the control measures included in the Sandpoint moderate PM10 SIP. On February 1, 2013, EPA proposed to approve in part and disapprove in part the Limited Maintenance Plan, and proposed to approve the redesignation request (78 FR 7340 (PDF)(8 pp, 266 K)).

On April 3, 2013, EPA took final action to approve in part and disapprove in the part the Sandpoint PM10 Limited Maintenance Plan and redesignate the Sandpoint area to attainment for PM10 (78 FR 20001 (PDF)(4 pp, 274 K)).


The plan relies on control strategies needed to maintain attainment of the PM10 National Ambient Air Quality Standards (NAAQS). The strategy focuses on a comprehensive residential wood combustion program, controls on fugitive road dust and emission limitations on industrial sources.

Control Measures

  • Uncertified Wood Stove Replacement Programs
  • Tax Reduction and Grant Incentive Programs
  • Episodic Curtailment Program
  • Improved Quality and Use of Anti-Skid Materials
  • Increased Street Sweeping


  • Ordinance No. 939 - Material Specifications for Street Sanding Material, February 22, 1994
  • Chapter 8 Air Quality (4–8–1 through 4–8–14) (Ordinance No. 965 as amended by Ordinances 1237 and 1258), Solid Fuel Heating Appliances, September 21, 2011


  • Interstate Concrete and Asphalt, August 2, 1999
  • Lake Pre-Mix Concrete, May 17, 1996

Contingency Measures

“Over control” from the mandatory residential wood burning curtailment program adopted by the City of Sandpoint in September 21, 2011, Ordinance No. 965 as amended by ordinances 1237 and 1258. (Control measures that are part of the core control strategy in the SIP when such control measures result in emission reductions greater than those required to achieve the NAAQS.)

EPA Effective Date

May 3, 2013