Kents Lake Algal Bloom Monitoring 2019

Warning Advisory

  • Do not swim or water ski in this area.
  • Avoid areas of algae scum when boating.
  • Keep animals away.
  • Do not ingest the water.
  • Clean fish well and discard guts.

Report a Bloom

24-Hour DEQ Environment Incidents Line: (801) 536-4123

Call Utah Poison Control Center

If you believe you or your pet have been exposed to a harmful algal bloom, call (800) 222-1222.

Get BloomWatch App

Help us track cyanobacteria blooms with your smartphone. Go to cyanos.org for more info.

Update September 23, 2019

The Southwest Utah Public Health Department has issued a Warning Advisory for Kents Lake after sampling conducted by the Division of Water Quality (DWQ) on September 10, 2019, showed anatoxin-a levels above the recreation health-based threshold for a Warning Advisory.

A Warning Advisory indicates a moderate relative probability of acute health risk, cell-count density of 20,000 – 10 million cells per milliliter (cells/ml), microcystin levels of 4-2,000 micrograms per liter (µg/L), or anatoxin-a levels above non-detect.


Update September 17, 2019

Kents Lake, September 10, 2019

Toxin test results received from the Utah Public Health Lab (UPHL) for samples collected by the Division of Water Quality (DWQ) at the access point on Kents Lake on September 10, 2019, showed anatoxin-a levels exceeding the recreation health-based threshold for a Warning Advisory. Microcystin levels and cyanobacteria cell-count concentrations were below the advisory threshold. The primary taxon in the samples was Dolichospermum, a known toxin-producer.

The DWQ monitoring crew observed visible cyanobacteria that resembled grass clippings. The cyanobacteria were consistent throughout the water column and clumped together in places.

Data Summary

Elbow-depth integrated composite sample

  • Sample date: September 10, 2019
  • Microcystin: 0.2 micrograms per liter (µg/L)
  • Anatoxin-a: 0.15 µg/L
  • Cyanobacteria cell-counts: 10,846 cells per milliliter (cells/mL)