State environmental regulators are investigating a fish kill in northwest Wisconsin.
The Department of Natural Resources said employees observed dead fish in Isabelle Creek flowing south along County Road C in Ellsworth, a Pierce County village of about 3,300, 35 miles southeast of the Twin Cities.
The DNR said staff have visited the site several times since Aug. 17, seeing about 600 dead trout and foraging species.
The agency has not found a cause and says the investigation is ongoing.
The site is downstream of a milk factory and two fertilizer installations.
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