Sewer System History
The history of the Nashville Sewerage System
1823 - Brick and Clay Sewers

Central Wastewater Treatment Plant Beginning in 1823, brick and clay sewers were constructed and conveyed both stormwater and sanitary sewage for discharge into the Cumberland River. Some of these sewers were constructed directly in Nashville’s streams. In more rural areas, outhouses gradually gave way to septic tanks as the primary method of disposal for sanitary waste.
1950 - Population Growth
By 1950, as Davidson County’s total population grew to more than 300,000, the discharge of untreated waste and failure of septic systems represented a significant threat to the environment and a challenge for a growing community. The sewer system had evolved to nearly 400 miles of sanitary sewer lines that emptied into a network of combined sewers, which discharged directly into streams and the river. The need was recognized for a system that would capture and treat the sewage.
1960-1970
The Central Wastewater Treatment Plant was built just north of downtown and began operation in 1958. As Nashville and Davidson County continued to grow, so did its wastewater system. The Dry Creek Wastewater Treatment Plant was built in the Rivergate area and began operation in 1961. The Whites Creek Wastewater Treatment Plant in West Nashville was placed in service in 1975.
1980
The 1980s marked the beginning of an aggressive sewer expansion program to help eliminate more septic systems in Davidson County. Even with three treatment plants, this aggressive expansion resulted in a need for additional improvements to control overflows that resulted from the amount of excess water entering the sewer system during rain events.
1990
The Overflow Abatement Program, launched in 1990, was an aggressive program designed to upgrade pumping stations and treatment plant capacities, repair leaking sewers and address combined sewer overflow impacts. Nashville has spent more than $700 million on overflow abatement projects and has made tremendous progress toward improving water quality in the Cumberland River watershed.