Upper 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 Upper Kents Lake after sampling conducted by the Division of Water Quality (DWQ) on September 10, 2019, showed cyanobacteria cell-count concentrations and 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

Upper Kents Lake, September 10, 2019

Cyanobacteria cell count concentrations for samples collected by the Division of Water Quality (DWQ) at the access point on Upper Kents Lake on September 10, 2019, exceeded the recreation health-based threshold for a Warning Advisory. Cell counts were approximately 1 million cells per milliliter (cells/mL) in the surface sample and approximately 770,000 cells/mL in the water column sample. Aphanizomenon was the primary taxon in the samples.

Toxin test results received from the Utah Public Health Lab (UPHL) also showed anatoxin-a levels exceeding the recreation health-based threshold for a Warning Advisory in both samples. Microcystin levels were well below the advisory threshold.

The DWQ monitoring crew observed visible cyanobacteria that resembled grass clippings. These cyanobacteria were consistent throughout the water column and also clumped together on the surface. The water column had a milky blue hue, and there was dried bloom material on the surface. of the lake.

Data Summary

Surface sample

  • Sample date: September 10, 2019
  • Microcystin: 0.2 micrograms per liter (µg/L)
  • Anatoxin-a: 0.21 µg/L
  • Cyanobacteria cell counts: 1,007,397 cells per milliliter (cells/mL)

Elbow-depth integrated composite sample

  • Sample date: September 10, 2019
  • Microcystin: <2.0 micrograms per liter (µg/L)
  • Anatoxin-a: 0.13 µg/L
  • Cyanobacteria cell counts: 770,835 cells per milliliter (cells/mL)