Water Quality | Disinfected Water & Hydrostatic Testing General Permit | Disinfected Water & Hydrostatic Testing Operations | Comment Period Closes October 23, 2025 | Public Meeting October 23, 2025
PERMIT/CATEGORY:
Disinfected Water & Hydrostatic Testing General Permit
GEOGRAPHIC REGION:
Statewide
FACILITIES:
Disinfected Water & Hydrostatic Testing Operations
RECEIVING WATERS:
State Surface Water
PERMIT NUMBER:
MTG770000
The renewal of this General Permit will continue to provide statewide general permit coverage for owners/operators of disinfected water and hydrostatic testing operations that discharge to state surface waters. The renewal is for a five-year cycle.
The General Permit allows disinfected water and hydrostatic testing operations that meet effluent limits and other conditions specified in the permit to discharge to state surface waters. The General Permit includes effluent limitations for Total Residual Chlorine (TRC), Total Suspended Solids (TSS), pH, Benzene, Toluene, Ethylbenzene, Xylenes (total), and oil & grease and monitoring requirements for flow. In addition, the draft permit includes a requirement for erosion control through installation and maintenance of Best Management Practices.
Associated Materials:
Comment Period Ends: October 23, 2025
Send Comments To:
DEQ Water Quality Division
Water Protection Bureau
PO Box 200901
Helena, MT 59620
Or electronically to: DEQWPBPublicComments@mt.gov
Public Hearing Information:
A public hearing will be held on the draft wastewater discharge permit, the fact sheet, environmental assessment, and the Department’s tentative determination.
October 23, 2025, at 10 AM
Wilderness Room
Colonial Building
2401 Colonial Drive
Helena, Montana
Or,
Attend on Zoom
Webinar ID: 825 7927 1874
Passcode: 157105
Join via audio: +1 206 337 9723
The department will make reasonable accommodations for persons with disabilities who wish to participate in this public participation process or need an alternative accessible format of this notice. If you require an accommodation, contact the department no later than 5:00 P.M. on October 13, 2025, to advise us of the nature of the accommodation that you need. Please contact the Department of Environmental Quality at P.O. Box 200901, Helena, Montana 59620-0901; phone (406) 444-6764; or e-mail DEQWPBPublicComments@mt.gov.
Tags: MEPA, Public Comment, Water and Public Meeting