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Algal blooms could return to recreational water following rain, flooding

Recent monsoonal rains and flash flooding could bring more algal blooms to Utah recreational water.

Recent monsoonal rains and flash flooding could bring more algal blooms to Utah recreational water. (Canva Images via KSL NewsRadio)

SALT LAKE CITY — Harmful algal blooms might be making a return to Utah lakes and reservoirs, according to water experts. The return of the bacteria has to do with recent monsoonal rains and flash flooding.

Cyanobacteria, what algal blooms are made of, like food and warm weather. The big rainstorms have supplied food by washing nutrients into the water. Now warmer temperatures appear to be the norm for the foreseeable future.

The rain is a blessing and a curse, said Dr. Kate Hickas, Utah Division of Water Quality Recreational Water Quality Health Program Coordinator.

"We want more water in our reservoirs. It helps with mixing and it helps dilute both water-borne pathogens and cyanobacteria," Hickas said. "Then, as the weather starts to pick up again, it gets really warm. Water levels are going down and now we have added food for these harmful algal blooms in the reservoirs."

For people unfamiliar with what these blooms look like, Dr. Hickas said they look unnatural.

"It can look like pea soup, really green and gunky. It can look like someone spilled their green paint in the water, it has an oily film. It can look like lime green water, really neon-colored. Sometimes they look like little green pom-poms in the water. Another common one, it can look like someone took their lawnmower clippings and dumped them straight into the water," Dr. Hickas explained.

To see photos of the algal blooms or check where the blooms are known to exist, go to

The Division of Water Quality is now monitoring several recreational bodies of water for the algal blooms on a weekly basis. The agency asks that you call them if you see a bloom at 801-536-4123.

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Nick Wyatt


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