Utah agriculture officials are advising farmers not to irrigate their crops or water livestock from the Scofield Reservoir of Price River because of a toxic algae bloom.
The Utah Department of Agriculture and Food said Friday that tests are showing elevated levels of toxins in the water.
The algae can release toxins that are fatal to animals, and people are also advised to keep pets from drinking the water.
Thousands of small fish have died near the bloom, and authorities have closed the reservoir to recreation for Labor Day weekend after discovering toxin levels at least five times greater than what is considered safe.
The reservoir about 40 miles from Price also provides drinking water to about 15,000 thousand people, but toxin levels have been low near the drinking water source.