Administrative Rules of Montana
Department 17 - ENVIRONMENTAL QUALITY
Chapter 17.30 - WATER QUALITY
Subchapter 17.30.6 - Surface Water Quality Standards and Procedures
Rule 17.30.618 - NATURAL AND NONANTHROPOGENIC WATER QUALITY STANDARDS
Current through Register Vol. 6, March 22, 2024
(1) Named waterbodies, waterbody segments, or waterbodies within geographic regions listed below have natural or nonanthropogenic concentrations for one or more parameters that exceed the applicable standards. For these waterbodies, the standards specified in (2) supersede the otherwise applicable water quality standards found elsewhere in state law.
(2) No person may violate the numeric water quality standards identified below:
(3) Named waterbodies, waterbody segments, or waterbodies within geographic regions specified in (2) have no assimilative capacity for the applicable natural or nonanthropogenic standards. Therefore, the department may not grant a mixing zone under ARM Title 17, chapter 30, subchapter 5 for these waterbodies and the specified standards.
AUTH: 75-5-201, 75-5-301, MCA; IMP: 75-5-222, 75-5-306, MCA