More than 73,000 gallons of sewage that was not disinfected to kill disease-carrying pathogens flowed into a tributary of Charlotte’s water supply Wednesday.

A brief power outage at the McDowell Creek sewage plant knocked out the final treatment step, ultraviolet disinfection, the Charlotte-Mecklenburg Utility Department said.

Partly-treated sewage flowed into the creek, which drains to Mountain Island Lake, until operators diverted it into storage basins. Bruce Henderson

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