Interesting ruling published in the Federal Register today on air quality in Washington and Idaho, essentially giving a checkoff from the Environmental Protection Agency on some new Northwest air rules.
The state agencies involved are the Department of Ecology in Washington and Department of Environmental Quality in Idaho. Here's the summary:
These provisions require each state to submit a State Implementation Plan (SIP) revision that prohibits emissions that adversely affect another state's air
quality through interstate transport. EPA is proposing to approve IDEQ's and Ecology's SIP revisions because they adequately address the four distinct elements related to the impact of interstate transport of air pollutants for their states. These include prohibiting emissions that contribute significantly to nonattainment of the NAAQS in another state, interfere with maintenance of the NAAQS by another state, interfere with plans in another state to prevent significant deterioration of air quality, or interfere with efforts of another state to protect visibility.