| http://www.w3.org/ns/prov#value | - the Clean Water Act was enacted 40 years ago, prohibiting any entity from discharging into a waterway without a National Pollutant Discharge Elimination System permit from the EPA or its delegated state authority, the focus was on toxic pollutants such as chemicals and metals.More recently, the threat is seen coming from nutrients such as phosphorus and nitrogen, which come from human and animal w
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