Montana Code Annotated
Chapter 5. Water Quality
Part 3. Classification and Standards

75-5-301. Classification and standards for state waters - 75-5-301. Classification and standards for state waters. Consistent with the...

75-5-302. Revising classifications in accordance with existing, present, and future most beneficial uses of water bodies - 75-5-302. Revising classifications in accordance with existing, present, and future...

75-5-303. Nondegradation policy - 75-5-303. Nondegradation policy. (1) Existing uses of state waters and...

75-5-304. Adoption of standards -- pretreatment, effluent, performance - 75-5-304. Adoption of standards -- pretreatment, effluent, performance. (1) The...

75-5-305. Adoption of requirements for treatment of wastes -- variance procedure -- appeals - 75-5-305. Adoption of requirements for treatment of wastes -- variance...

75-5-306. Purer than natural unnecessary -- dams -- definition - 75-5-306. Purer than natural unnecessary -- dams -- definition. (1)...

75-5-307. Hearings required for classification, formulation of standards, and rulemaking - 75-5-307. Hearings required for classification, formulation of standards, and rulemaking....

75-5-308. Short-term water authorizations -- water quality standards - 75-5-308. Short-term water authorizations -- water quality standards. (1) Because...

75-5-309. Repealed - 75-5-309. Repealed. Sec. 3, Ch. 378, L. 2015. History: En....

75-5-310. Site-specific standards of water quality for aquatic life - 75-5-310. Site-specific standards of water quality for aquatic life. (1)...

75-5-311. Local water quality districts -- department approval -- local water quality programs - 75-5-311. Local water quality districts -- department approval -- local...

75-5-312. Temporary water quality standards - 75-5-312. Temporary water quality standards. (1) The department may, on...

75-5-313. Repealed - 75-5-313. Repealed. Sec. 9, Ch. 342, L. 2021. History: En....

75-5-314. Repealed - 75-5-314. Repealed. Sec. 9, Ch. 342, L. 2021. History: En....

75-5-315. Outstanding resource waters -- statement of purpose - 75-5-315. Outstanding resource waters -- statement of purpose. (1) The...

75-5-316. Outstanding resource water classification -- rules -- criteria -- limitations -- procedure -- definition - 75-5-316. Outstanding resource water classification -- rules -- criteria --...

75-5-317. Nonsignificant activities - 75-5-317. Nonsignificant activities. (1) The categories or classes of activities...

75-5-318. Short-term water quality standards for turbidity - 75-5-318. Short-term water quality standards for turbidity. (1) Upon authorization...

75-5-319. Repealed - 75-5-319. Repealed. Sec. 9, Ch. 342, L. 2021. History: En....

75-5-320. Temporary water quality standards variances - 75-5-320. Temporary water quality standards variances. (1) Except as provided...

75-5-321. Transition for nutrient standards - 75-5-321. Transition for nutrient standards. (1) By March 1, 2022,...

75-5-322. through 75-5-324 reserved - 75-5-322 through 75-5-324 reserved.

75-5-325. Definitions - 75-5-325. Definitions. As used in this part, unless the context...

75-5-326. Gray water reuse -- restrictions - 75-5-326. Gray water reuse -- restrictions. (1) Gray water may...

75-5-327. Local gray water regulations - 75-5-327. Local gray water regulations. The requirements of 75-5-305 and...