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Summary of Spokane Particulate Matter (PM-10) Attainment Plan


The Spokane, Washington, area was designated nonattainment for PM10 and classified as moderate upon enactment of the Clean Air Act Amendments in 1990.

Washington submitted a PM10 attainment plan on December 12, 1994, and EPA approved the Plan on January 27, 1997 (62 FR 3800 (PDF)(4 pp, 131 K, About PDF)).


The plan relies on control strategies needed to assure attainment of the PM10 National Ambient Air Quality Standards (NAAQS). The strategy focuses on control of windblown dust from unpaved and paved roads, and residential wood combustion.


  • SCAPCA Section 6.05, Particulate Matter & Preventing Particulate Matter from becoming Airborne
  • SCAPCA Section 6.14, Standards for Control of Particulate Matter on Paved Surfaces
  • SCAPCA Section 6.15, Standards for Control of Particulate Matter on Unpaved Roads
  • SCAPCA Article VIII, Solid Fuel Burning Device Standards
  • WAC 173-433, Solid Fuel Burning Device Standards 

Resolutions and Orders

  • City of Spokane Resolution 90-93, October 8, 1990, Street Paving
  • City of Spokane Resolution 91-42, June 17, 1991, Six Year Comprehensive Street Program
  • City of Spokane Resolution 93-43, May 10, 1993, Street Sweeping & Reduced Use of Sanding Materials
  • Spokane County Resolution 90-1219, October 9, 1990, Street Paving
  • SCAPCA Order No. 91-01, December 12, 1991, Alternate Opacity Limit for Kaiser Aluminum
  • SCAPCA Orders No. 96-03 to 96-06*, April 24, 1996, Limiting Potential to Emit, Kaiser Aluminum

*Note: SCAPCA Orders No. 96-03, 96-05, and 96-06 were replaced July 1, 2005 (70 FR 38029). See Summary of Spokane PM10 Maintenance Plan.

Contingency Measures

  • SCAPCA Section 6.15.G., Standards for Control of Particulate Matter on Unpaved Roads
  • SCAPCA Section 8.07 & Section 8.09, Ban on Uncertified Stoves
  • SCAPCA Zoning Code Ordinances 4.17.059 and 4.802.080, May 24, 1990, Paving of New Parking Lots

EPA Effective Date

March 28, 1997