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Clean Water Act (CWA) <br /> • Federal Water Pollution Control Act <br /> Amendments of 1972 became Clean Water <br /> Act in 1977 <br /> - Basic structure for regulating discharges of <br /> pollutants into the waters of the United States. <br /> • Clean Water Act mandates that states <br /> - Identify impaired waters <br /> - Establish a total maximum daily nitrogen limit <br /> (TIVIDL) to remediate waters <br /> - Take actions to meet the limit <br /> Popponesset Pilot Project Slide 3 <br />