Implementing the Clean Water Act involves (check all that apply): Cooperation among federal, state, tribal, and some local organizations. Implementing different regulations and programs, such as the Total Maximum Daily Loads (TMDL), the National Pollutant Discharge Elimination System (NPDES), among others. Implementing programs to address point sources of pollution. Implementing programs to address nonpoint sources of pollution. Has evolved over time with multiple revisions of the Clean Water Act