Faced with increasingly stringent phosphorus limits, the Oconomowoc Wastewater Treatment Facility implemented real-time monitoring and automated chemical control to ensure compliance.
The mid-sized utility must maintain a total phosphorus effluent limit of 0.95 mg/L — and is preparing for even tighter future regulations. Averaging 2.4 mgd, the plant sought a reliable, cost-effective strategy for meeting evolving regulations while minimizing chemical use.
Oconomowoc WWTF is also a founding member of the Oconomowoc Watershed Protection Program, a collaborative initiative that tackles phosphorus reduction at the source through conservation agriculture, stormwater practices, and community partnerships. While the OWPP targets upstream improvements, smart instrumentation at the treatment plant minimizes phosphorus discharge downstream.
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