www.hydro-int.com Tel: (866) 615 8130 The City of Columbus, GA knew firsthand the pollution problems that combined sewer systems caused. In dry conditions, the city’s combined sewer overflows (CSOs) were not a problem, but during heavy rain events the rapid influx of stormwater caused the system to overload — resulting in untreated water to flow directly into the Chattahoochee River. The river provides drinking water for over half of all

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