Transcription of MONTANA NUMERIC WATER QUALITY STANDARDS
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CIRCULAR DEQ-7. MONTANA NUMERIC WATER QUALITY STANDARDS . June 2019. Prepared by: MONTANA Department of Environmental QUALITY WATER QUALITY Planning Bureau WATER QUALITY STANDARDS and Modeling Section 1520 E. Sixth Avenue Box 200901. Helena, MT 59620-0901. Suggested citation: MONTANA DEQ, WATER QUALITY Division, WATER QUALITY Planning Bureau, WATER QUALITY STANDARDS and Modeling Section. 2019. DEQ-7 MONTANA NUMERIC WATER QUALITY STANDARDS . Helena, MT: MONTANA Dept. of Environmental QUALITY . DEQ-7 MONTANA NUMERIC WATER QUALITY STANDARDS INTRODUCTION. The Department of Environmental QUALITY (Department) Circular DEQ-7 (DEQ-7) contains NUMERIC WATER QUALITY STANDARDS for MONTANA 's surface and ground waters.
Numeric nutrient standards for aquatic life and recreation are not included in DEQ-7, but are addressed in Department Circular DEQ-12A. The human health standards for nitrogenous compounds are found in DEQ-7 and are listed as toxic compounds. Human health criteria also have a magnitude, duration and frequency component. The standard assumption in
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