which of the following is the main purpose of the clean water act?

The main purpose of the Clean Water Act is to restore and maintain the chemical, physical, and biological integrity of the nation's waters by regulating discharges of pollutants into them and setting water quality standards. It aims to prevent pollution from point sources and protect water quality for drinking, recreation, aquatic life, and overall ecosystem health by controlling industrial, municipal, and other sources of water pollution through permits and other enforcement mechanisms.