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Cities look to reduce chloride in water plants

MORRIS (AP) — Some Minnesota cities are grappling with how to reduce the amount of chloride being released from their wastewater treatment plants into lakes and streams, threatening aquatic life.

The state estimates that about 100 municipal wastewater treatment plants are releasing more chloride than allowed by state standards.

While road salts are the biggest culprit of excess salt entering the environment, researchers at the University of Minnesota’s Water Resources Center are telling cities to address the use of water softeners.

“For a lot of these wastewater treatment plants, road salt isn’t going to be their No. 1 source,” said Sara Heger, the center’s research engineer.

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