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Delhart general manager reviews plant upgrades, capacity and future regulatory risks
Summary
Rob Manema, general manager of the Delhart wastewater commission, presented a historical review of the Delafield–Hartland system, outlined recent upgrades completed in 2024, described flows and peak-day stress during an August storm, and flagged PFAS and future nutrient limits as possible cost drivers.
Rob Manema, general manager of the Delhart wastewater commission, told the Village of Hartland board on Tuesday that the facility completed a biological phosphorus upgrade in July 2024 and is operating within its design average but faces regulatory uncertainty on PFAS and potential future nutrient limits. "If we did nothing, the estimated chemical cost to meet limits would be about a half million dollars a year," Manema said, explaining part of the rationale for the roughly $7 million biological upgrade.
Manema said the commission, formed by the City of Delafield and the Village of Hartland in 1971, put the plant online in 1980 and completed a major capacity expansion in 2005. That project increased design flow from 2.2 million gallons per day (MGD) to 3.23 MGD; the facility’s current average flow is about 2.0 MGD and the design peak-day capacity…
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