Managing Combined Flow

Lima’s integrated planning approach helps reduce CSOs and protect the Ottawa River.

Managing Combined Flow

The city of Lima, Ohio, agreed to construct a 13 million-gallon CSO storage tank as part of a 2014 consent decree with the EPA. The project, which cost nearly $40 million, was part of $147 million in overall improvements required by the consent decree. (Images Courtesy of Xylem, Inc.) 

The city of Lima, Ohio, struggled with combined sewer overflow issues for decades. Something had to change.

Of the city’s 251 miles of sewer lines, roughly 130 miles are combined storm and sanitary sewers. Lima’s 90-year-old wastewater treatment plant serves more than 40,000...

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