An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Summary of Northern Ada County (Boise) PM-10 Nonattainment Area Plan


The Ada County, Boise, Idaho, area was designated nonattainment for PM10 and classified as moderate under the Clean Air Act Amendments of 1990. Idaho submitted a PM10 attainment plan on November 14, 1991, and submitted a revised SIP on December 30, 1994. EPA approved the plan on May 30, 1996 in (61 FR 27019 (PDF)(5 pp, 141K, 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 residential wood burning.


  • Boise City Woodburning Ordinance and Boise City Burning Ban Enforcement Procedures, January 1, 1990
  • Wood Smoke Control Ordinances for the Cities of Garden City, Meridian, and Eagle, and for Unincorporated Ada County

Contingency Measures

“Over control” from the wood smoke control measures. (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

July 29, 1996