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DuchesneUintahUintah County

Harmful algae identified in Uintah County reservoirs

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A macro view of thick, bright green algae swirling on the surface of dark reservoir water, with blurred red rock cliffs in the distance.
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Utah News spotted this story published August 19, 2026 at ABC 4. Full coverage may follow as more sources report.

UINTAH COUNTY, Utah (ABC4) — Health officials have found harmful algal blooms at Calder and Matt Warner reservoirs. According to the TriCounty Health Department, which serves Uintah, Daggett, and Duchesne counties, there are Harmful Algal Blooms (HABs) present at Calder and Matt Warner Reservoirs. HABs can produce toxins dangerous to humans and animals.

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CityDuchesne, Uintah, Uintah County