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Columbus Water Works explains combined sewer treatment role; engineers say system is not a flood-control measure
Summary
Columbus Water Works briefed council on the Combined Sewer System (CSS), explaining how overflow treatment facilities work and clarifying that the infrastructure treats water quality but does not function as flood control during intense storm events.
Engineering staff and Columbus Water Works provided a briefing and short video on May 13 describing the city’s combined sewer treatment system (CSS) and its role in protecting river water quality.
Speakers explained the CSS serves an approximately 2,000‑acre area of Uptown Columbus and that during dry weather the system conveys wastewater to the treatment plant. During storms, the CSS handles combined flow and routes excess to backup treatment facilities where screens, chlorination, grit removal and dechlorination reduce debris and pathogens before discharging…
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