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

Recent News

DEQ awards $3,200,000 to the Bailey Creek Homeowners Association in Caribou County

February 25, 2026 | Construction Grant, News Releases

BOISE – The Idaho Department of Environmental Quality (DEQ) awarded a $3,200,000 low-interest drinking water construction loan to the Bailey Creek Homeowners Association in Caribou County, Idaho.

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DEQ seeks member for Clearwater Basin Advisory Group

February 25, 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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DEQ preparing draft 401 water quality certification for Ashton Hydroelectric Project

February 3, 2026 | News Releases

IDAHO FALLS – The Idaho Department of Environmental Quality (DEQ) is preparing a draft 401 water quality certification for the Ashton Hydroelectric Project—Federal Energy Regulatory Commission (FERC) …

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DEQ awards $142,500 to four water systems across Idaho

January 30, 2026 | News Releases, Planning Grant

BOISE – The Idaho Department of Environmental Quality (DEQ) awarded $142,500 to four water systems to help evaluate deficiencies and determine necessary upgrades.

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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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