Minneapolis St. Paul, MN, October 12, 2026 — Minneapolis is employing an unconventional yet effective method to safeguard the drinking water supply for approximately half a million residents: mussels. The city’s water treatment plant in Fridley, Minnesota, has implemented a program that uses these bivalves as a biological monitoring system to detect potential pollution.

This initiative marks the program as the only one of its kind currently operating in the United States. The mussels act as highly sensitive early warning indicators, reacting to changes in water quality that might signal the presence of contaminants before they are detected by conventional technological methods. By observing the behavior and physiological responses of the mussels, plant operators can gain crucial insights into the health of the water flowing into the treatment facility.

The program’s reliance on living organisms highlights a growing interest in bio-monitoring solutions for environmental protection and public health. Mussels are particularly well-suited for this role due to their sessile nature and their filtering activity, which exposes them directly to substances present in the water column. Any adverse reactions, such as changes in pumping rates or shell closure, can trigger alerts for further investigation by human operators.

This innovative approach aims to enhance the robustness of Minneapolis’s water quality assurance protocols, providing an additional layer of protection for the region’s drinking water. The specific contaminants being monitored and the precise operational details of the mussel system were not detailed in the summary, but the program’s objective is to ensure the continuous safety and purity of the water delivered to consumers.


Story summarized from the original created by Claire Carlson on www.minnpost.com, see more information here.

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