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Summary of Klamath Falls PM-10 Maintenance Plan


Klamath Falls, Oregon, was designated as a moderate PM10 nonattainment area upon enactment of the Clean Air Act Amendments of 1990.

Oregon submitted a maintenance plan and redesignation request on November 4, 2002. EPA approved the maintenance plan and redesignation request on October 21, 2003 (68 FR 60036 (PDF)(7 pp, 155 K, About PDF)).


The plan relies on control strategies needed to maintain the PM10 National Ambient Air Quality Standards (NAAQS). The strategy focuses on residential wood combustion, woodstove emissions, open burning, and a major new source review program for industry.


  • OAR 340-204-0040(3)(b) - Designation of Maintenance Areas
  • OAR 340-222 - Stationary Source Plant Site Emission Limits
  • OAR 340-224 - Major New Source Review
  • OAR 340-262 - Residential Wood Heating

Klamath County and City Ordinances

  • Klamath County Clean Air Ordinance 63.03, August 22, 2001
  • Klamath County Resolution 98-036, Secondary Heat Sources for Low Income Families, December 23, 1997
  • Memorandum of Understanding, Klamath County Voluntary Smoke Management Program, April 24, 1991
  • Memorandum of Understanding, Klamath County Agricultural Voluntary Smoke Management Program, June 3, 1991
  • Letter of Agreement from ODOT, Winter Road Sanding Control Program, December 11, 1989
  • City of Klamath Falls Ordinance 6630, September 16, 1991

Contingency Measures

  • Phase I (triggered if PM-10 concentrations equal or exceed 90% of standard) - Phase I would require a review of various residential and outdoor burning requirements and alternative burning practices.
  • Phase II (triggered if there is a violation) - Phase II of the plan would require the implementation of strategies identified in Phase I as well as nonattainment permitting requirements for all new or modified major sources.

EPA Effective Date

December 22, 2003