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

Recent News

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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DEQ to hold public meeting to collect comments on draft 401 water quality certification for Felt Hydroelectric Project

August 24, 2026 | News Releases

DRIGGS – The Idaho Department of Environmental Quality (DEQ) will hold a public meeting to receive comments on the draft Clean Water Act (CWA) Section 401 Water Quality Certification for the Felt Hydr…

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DEQ seeks representative for Middle Snake Watershed Advisory Group

August 14, 2026 | News Releases

TWIN FALLS – The Idaho Department of Environmental Quality (DEQ) is seeking representatives to fill two vacancies on the Middle Snake Watershed Advisory Group (WAG).

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DEQ seeks representative for Wood River Watershed Advisory Group

August 11, 2026 | News Releases

TWIN FALLS – The Idaho Department of Environmental Quality (DEQ) is seeking a representative to fill a vacancy on the Wood River Watershed Advisory Group (WAG). 

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Did You Know?

Some contaminants are regulated under the Safe Drinking Water Act, while others are unregulated. More information on both regulated and unregulated contaminants can be found on DEQ’s Contaminants in Drinking Water page.
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