State regulators have detailed plans to ratchet down a source of noxious, water-choking algae blooms on a series of popular reservoirs in the Wisconsin River. The Department of Natural Resources is targeting phosphorus that flows into the state’s longest river from Rhinelander south to Lake Wisconsin. Phosphorus has been a contributing factor in fish kills and blooms of toxic blue-green algae while making summer boating virtually impossible at times on some of the waterways.

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