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Updated at 4 p.m. on August 22, 2025: DEQ issued an Air Quality Advisory for 6 Idaho counties: Clearwater, Idaho, Latah, Lemhi, Lewis, and Nez Perce Counties, where all burning is prohibited. Take steps to protect your health and check DEQ’s open burning map for future burn decisions.
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Idaho Department of Environmental Quality
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DEQ seeks comment on 2024 Exceptional Events Demonstration
Accepting comments from August 15, 2025, through September 15, 2025.
The Idaho Department of Environmental Quality (DEQ) is seeking comment on the 2024 Exceptional Events Demonstration.
In 2024, the United States Environmental Protection Agency (EPA) lowered the National Ambient Air Quality Standards (NAAQS) for PM2.5 and will use the new standards to designate areas as attainment, nonattainment, or unclassifiable. Under the Clean Air Act, agencies can submit exceptional event demonstrations and ask that certain air quality data to be excluded from attainment calculations. DEQ is requesting the exclusion of one wildfire date in 2024 at the Nampa-Ridgecrest monitoring site.
The draft demonstration is available for review on DEQ’s website, at DEQ’s State Office (1410 N. Hilton Street, Boise, Idaho), and regional offices. Written comments will be accepted through September 15, 2025, at 5 p.m. (MDT). When submitting comments or requesting additional information, reference the 2024 Exceptional Events Demonstration title.
Comments can be submitted electronically using the form below or via mail or email to:
Dianne Hobbs
Idaho Department of Environmental Quality
1410 North Hilton Street
Boise, Idaho 83706
Dianne.hobbs@deq.idaho.gov
Related Documents
2024 Exceptional Events Demonstration
Accessibility Services: The Idaho Department of Environmental Quality will provide reasonable language access services and/or disability services for documents at no charge. To request an accommodation under Title VI of the Civil Rights Act of 1964 or Americans with Disabilities Act, contact DEQ’s nondiscrimination coordinator at (208) 373-0271 or accessibility@deq.idaho.gov. Para obtener información en español, visite https://www.deq.idaho.gov/about-us/accessibility/.
Public Comment Form