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. The STANDARDS were developed in compliance with Section 75-5-301, MONTANA Code Annotated (MCA) of the MONTANA WATER QUALITY Act, Section 80-15-201, MCA. (the MONTANA Agricultural Chemical Groundwater Protection Act), and Section 303(c) of the Federal Clean WATER Act (CWA).
Nutrients in the aquatic environment are essential substances (organic or inorganic) which are used by living organisms such as algae or bacteria for cellular metabolism or construction. Examples include nitrogen (typically as ammonia, nitrate, or nitrite) and phosphorus. If present in excessive amounts (which depends on
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