Region 4: Topics & Issues

EPA Region 4

Water Quality Standards
Assisting States and Tribes of the southeast in the development of Water Quality Standards' Programs that fulfill the Clean Water Act

Total Maximum Daily Loads (TMDL) Program
Assisting States of the southeast in identifying impaired waterbodies and developing TMDLs for these impaired waters.

EPA Headquarters

Water Quality Criteria and Standards
Information related to water quality, biological, aquatic, and wildlife criteria and state water quality standards

Water Quality Models
Download EPA models that simulate the movement of precipitation and pollutants from sources to receiving waters.