Read this US policy on clean water. The Clean Water Act (CWA) establishes the basic structure for regulating discharges of pollutants into the waters of the United States and regulating quality standards for surface water. –Summary of the Clean Water Act, Environmental Protection Agency How can the Clean Water Act best promote health by monitoring a toxic spill that affects a drinking water supply by providing pamphlets related to the quality of drinking water by carrying out research about the effects of large discharges by controlling the amount of water people use in their homes