CO Maintenance Plan

Proposed State Implementation Plan Revision: Spokane Carbon Monoxide Maintenance Plan and Redesignation Request Background information

Local air pollution control agencies periodically submit air quality plan updates and regulations to the Department of Ecology (Ecology) for inclusion in Washington’s State Implementation Plan (SIP). The SIP is a collection of air polution regulations, programs and plans to ensure that state air quality meets the National Ambient Air Quality Standards established by the federal Environmental Protection Agency 

The Spokane area was designated nonattainment for carbon monoxide air pollution. This means that, in the past, the area did not meet federal health-based standards for carbon monoxide. As the area has been meeting the standards since 1994, it has now be redesignated to attainment by the EPA.

The Spokane County Air Pollution Control Agency and Ecology have prepared a carbon monoxide maintenance plan For the Spokane Area. The maintenance plan shows that the Spokane area meets federal Clean Air Act requirements for carbon monoxide; summarizes the progress of the area in meeting the carbon monoxide standard; and includes a plan to assure that the area will continue to meet the standard for ten years after it is redesignated. Copies of the plan are available for review at:

Spokane County Air Pollution Control Authority 1101 W. College Ave., Suite 403 Spokane, WA  99201

The following documents are availble for review on line:

• Spokane CO Nonattainment area Maintenance Plan