VERNAL--A popular recreational site, Matt Warner Reservoir, has been closed by the TriCounty Health Department and the Utah Department of Environmental Quality following testing that revealed dangerous levels of bacteria in the water.

A water sample recently taken from Matt Warner Reservoir showed 109 million cells per milliliter of cyanobacteria — over 11 times higher than the Environmental Protection Agency’s threshold for closure.

The reservoir is closed to all forms of swimming, fishing and recreation. The DNR will cite individuals found fishing in the toxic body of water.

Nearby Calder Reservoir also has measurable amounts of bacteria, but has not yet risen to the levels found at Matt Warner Reservoir.

Officials will continue to monitor the reservoir on a weekly basis and will announce the reopening of the waterway, as soon as it is once again safe. Residents can monitor the test results at habs.utah.gov.

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