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We protect human health and the quality of Idaho's air, land, and water.

Recent News

DEQ seeks applications for Idaho AIR-FAIR high school competition

September 18, 2026 | News Releases

BOISE – The Idaho Department of Environmental Quality (DEQ) is seeking applications to the Idaho AIR-FAIR, an educational pilot program for the 2026–2027 school year.

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DEQ seeks member for Clearwater Basin Advisory Group

September 17, 2026 | News Releases

LEWISTON – The Idaho Department of Environmental Quality (DEQ) is seeking a representative to fill a vacancy on the Clearwater Basin Advisory Group (BAG).

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Proper septic system operation and maintenance protect human health and Idaho’s water quality

September 14, 2026 | News Releases

BOISE – Many Idaho households that are not served by public sewers rely on septic systems to treat and dispose of wastewater. Proper operation and maintenance help protect public health, drinking wate…

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DEQ releases 2026 Triennial Review of Idaho Water Quality Standards

September 9, 2026 | News Releases

BOISE – The Idaho Department of Environmental Quality (DEQ) released the 2026 Triennial Review of Idaho Water Quality Standards. The review will guide water quality standards rulemaking and subprogram…

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Did You Know?

If DEQ determines a violation has occurred, DEQ can issue a warning letter or a notice of violation; refer the case to the Idaho Attorney General’s office for civil or criminal enforcement; or refer the case to other relevant local, state, or federal enforcement agencies for enforcement consideration. See DEQ’s Compliance and Enforcement page for more information.
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