The On-Site Water and Wastewater Program regulates the design and installation of septic systems and water wells for single-family homes. There are over 15,000 on-site septic systems in the Municipality of Anchorage serving more than 50,000 residents. These systems produce an average of 4 million gallons of septic effluent per day. The program helps make sure this effluent is treated appropriately to protect the water quality in Anchorage. The On-site Water and Wastewater Program also actively promotes the testing and installation of innovative wastewater treatment systems.