Montana Department of Environmental Quality Proposes Amendments to Water Quality Standards
The Montana Department of Environmental Quality has initiated rulemaking to amend water quality standards as directed by House Bill 685, enacted by the 2025 Montana Legislature. The proposed amendments involve changes to four Administrative Rules of Montana, specifically ARM 17.30.201, ARM 17.30.706, ARM 17.30.707, and ARM 17.30.708. These changes include altering the terminology from 'authorizations to degrade' to 'feasibility allowances' and removing the requirement for applicants to demonstrate that the economic or social benefits of a project exceed the costs of water degradation. Instead, applicants must now show that their projects will result in significant economic or social development in the area of the high-quality waters. A public hearing on these amendments is scheduled for April 21, 2026, in Helena, Montana, with options for virtual attendance.