CSOs Reduced by 77%, SSOs Reduced by 78%


Courtesy of ADS Environmental Services

Nashville, TN - The City of Nashville struggled with excessive overflows totaling 158 SSOs and 30 CSOs in 1989 and 1990. They found themselves with a consent decree and officials immediately started abatement programs to address both issues. A long term flow monitoring network was installed by ADS Environmental Services along with I/I analysis designed to isolate the problems.

Measurable Results
Initially reactive, responding to overflows after they happened, Nashville designed a strategy that allowed them to progress over eight years to a proactive management process. Over the last seven years they have been proactively managing their wastewater collection system by identifying areas with increased I/I and addressing it before it becomes an overflow issue.

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