Revise categorical exclusions from nondegradation authorization

This Montana bill (LC 1155) requires the Department of Environmental Quality to amend a rule by January 2026, creating a new pathway for counties to exclude certain land uses from water quality review. Specifically, counties must demonstrate two conditions: (1) no drinking water wells in the area, and (2) absorption trenches (e.g., septic systems) located at least 1,000 feet from high-quality surface waters. The bill appropriates $10,000 from the general fund to support this rule change and provides guidance for the exclusion process. It takes effect upon passage, with the funding provision starting July 1, 2025.