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DEQ seeks comment on draft modified Idaho Pollutant Discharge Elimination System permit for the city of Cascade

June 15, 2023

Contact: Matt Stutzman, IPDES Permit Writer,

CASCADE – The Idaho Department of Environmental Quality (DEQ) seeks comment on a draft modified Idaho Pollutant Discharge Elimination System (IPDES) permit and associated fact sheet for the City of Cascade publicly owned treatment works.

This draft permit authorizes the discharge of treated municipal wastewater year-round to the South Fork Payette River. The city’s current IPDES permit was issued January 7, 2020, and expires February 28, 2025. The modified version of the permit will retain the expiration date. The modification changes the monitoring location for compliance with the total suspended solids effluent limits at Outfall 002 from the groundwater monitoring well (GWMW 001) to the internal discharge from cell #3 (Internal Discharge 001). Additionally, the modified permit removes the 24-hour reporting requirement for routine monitoring of E. coli at Internal Discharge 001.

The formal public notification of a draft permit initiates a minimum 30-day public review and comment period, providing an opportunity for any interested stakeholders to comment on the content of the permit, specific to only those parts of the permit that have been revised from the 2020 permit issued January 7, 2020, as outlined in the modified fact sheet.

The draft permit and fact sheet are available for public review at DEQ’s State Office (1410 N. Hilton Street, Boise, Idaho), DEQ’s Boise Regional Office (1445 N. Orchard Street, Boise, Idaho), and on DEQ’s Public Comment Opportunities page. A public meeting may be held, if requested in writing, by June 29, 2023.

Written comments on the draft permit and fact sheet will be accepted through July 17, 2023, at 5 p.m. MDT. Comments and questions regarding this process should be directed to Matt Stutzman, or DEQ’s Public Comment Opportunities page . Comments should address water quality considerations, include supporting materials where available, and reference the City of Cascade POTW and permit number (ID0023167).

Submit requests for a public meeting on DEQ’s website or by mail, or email to:

Matt Stutzman
Idaho Department of Environmental Quality
Surface & Wastewater Division
1410 N. Hilton St.
Boise, ID  83706

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