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

What is the best way to use the Clean Water Act to address the issue of dirty water and diseases that plague a small community?

to report the number of cases of people who have cholera symptoms
to provide health guidelines about effects from waterborne diseases
to enforce standards that focus on chemical discharge into bodies of water
to carry out research that investigates how dirty water affects human health