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Summary of Yakima Carbon Monoxide (CO) Maintenance Plan


Yakima, Washington, was designated nonattainment for carbon monoxide (CO) and classified as “not classified” upon enactment of the Clean Air Act Amendments in 1990.

Washington submitted a limited CO maintenance plan on September 26, 2001 and EPA approved the Yakima limited CO maintenance plan on November 1, 2002 (67 FR 66555 (PDF)(7 pp, 155 K, About PDF)).


The plan relies on control strategies needed to maintain attainment of the CO National Ambient Air Quality Standards (NAAQS). The strategy focuses on a motor vehicle control program, and residential wood stove combustion.


  • Yakima Regional Clean Air Agency (YRCAA) Rules 
  • Article I, Policy, Short Title and Definitions
  • Article II, General Provisions
  • Article III, Violations, Orders and Hearings
  • Article IV, Registration and Notice of Construction
  • Article V, Emissions Standards and Preventative Measures
  • Article VIII, Penalty and Severability
  • Article IX, Woodstoves and Fireplaces
  • Article XII, Adoption of State and Federal Regulations
  • Article XIII, Fee Schedules and Other Charges
  • 40 CFR Part 86, Federal Motor Vehicle Emission Control Program 
  • RCW 70.94.531, Commute Trip Reduction Program
  • WAC 173-433-100, Prohibition of the installation of uncertified wood stoves
  • WAC 173-433-140 (1)(b), Impaired air quality criteria
  • WAC 173-433-150, Wood stove curtailment

Contingency Measures

City of Yakima, Resolution No. 2000-115, Joint Policy with the Yakima Regional Clean Air Authority for implementation of the Yakima CO Air Quality Transportation Contingency Measure, September 19, 2000.

EPA Effective Date

December 31, 2002