Idaho Department
of Environmental Quality

May 29, 2025
The Idaho Department of Environmental Quality (DEQ) released modified Idaho Pollutant Discharge Elimination System (IPDES) preliminary draft permits to the Hayden Area Regional Sewer Board and the cities of Post Falls and Coeur d’Alene for preliminary review.

September 29, 2023

BOISE — The Idaho Department of Environmental Quality (DEQ) has reviewed for completeness an application from Perpetua Resources Idaho, Inc. for a permit to construct, operate, and close a cyanidation facility intended to contain, treat, or dispose of process water or process-contaminated water containing cyanide.