The Roanoke Regional Water Pollution Control Plant provides tertiary treatment for an average of 32-million gallons of sanitary sewer a day from all jurisdictions in the Roanoke Valley. A drop of water entering the Regional Water Pollution Control Plant takes approximately 24 hours to move through all levels of the liquid treatment process.

Along the way, more than 3,000 lab tests are conducted every month to verify that the liquid treatment process is meeting or exceeding water quality standards. The Regional Water Pollution Control Plant meets some of the most stringent requirements for treatment of any plant in Virginia.