The bill proposes significant changes to Montana's water quality standards by eliminating existing numeric nutrient standards and replacing them with narrative nutrient standards. It seeks to repeal the current base numeric nutrient standards and instructs the Department of Environmental Quality (DEQ) to amend various administrative rules to remove references to these numeric standards and related variances. Additionally, the bill calls for the repeal of the Nutrient Work Group, which previously advised on nutrient standards, indicating a shift in the management of nutrient criteria in the state.

Key provisions include the amendment of Section 75-5-103 of the Montana Code Annotated (MCA) to redefine terms related to water quality management, and the repeal of Section 75-5-321 concerning numeric nutrient standards. The DEQ is tasked with updating its guidance and assessment methods to align with the new narrative standards, streamlining the regulatory framework. The bill also introduces new definitions and clarifications, modifies the composition of the nutrient work group by removing certain representation requirements, and establishes a framework for monitoring and managing water quality standards. The act is set to take effect immediately upon passage.

Statutes affected:
LC Text: 75-5-103