Panguitch Lake Algal Bloom Monitoring 2018

Warning Advisory

  • Do not swim or water ski
  • Do not ingest the water
  • Keep pets and livestock away
  • Clean fish well and discard guts
  • Avoid areas of scum when boating

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.

Panguitch Lake is located approximately 18 miles southwest of the city of Panguitch and sits at an elevation of 8,812 feet in the Dixie National Forest. The lake is a popular camping and water recreation destination.

Update September 21, 2018

Northeast shore, September 13, 2018

The Division of Water Quality (DWQ) visited Panguitch Lake on September 12, 2018, and observed cyanobacteria blooms at all three monitoring sites on the lake. DWQ collected samples at the northern end of the lake where the cyanobacteria accumulation was the greatest. This location is also where Panguitch Lake exits into Panguitch Creek.

Toxin test results from the Utah Public Health Lab (UPHL) for samples collected on September 12, 2018, show microcystin levels after 5000x dilution that were at least 12.5 times higher than the recreation health-based threshold for a Danger Advisory. Further dilutions by the lab will be necessary to quantify microcystin concentrations, and these levels could go even higher after these dilutions.

DWQ collected samples from Panguitch Creek at the White Bridge Campground below Panguitch Lake on September 18, 2018. Toxin test results were non-detect for anatoxin and >5 µg/L for microcystins. Further dilutions by the lab will be necessary to quantify microcystin concentrations, and the preliminary values could go even higher after these dilutions.

Toxin Test Results

Panguitch Lake

Test results from the Utah Public Health Lab (UPHL)

  • Anatoxin-a: <0.1 micrograms per liter (µg/L)
  • Microcystin: >25,000 µg/L

White Bridge Campground (below Panguitch Lake)

Test results from the Utah Department of Agriculture and Food (UDAF) lab

  • Anatoxin-a: <0.1 µg/L
  • Microcystin: >5 µg/L

Update August 21, 2018

Cyanobacteria cell-count concentrations from a sample collected August 8, 2018, at the Panguitch Lake Boat ramp showed high cell counts of 5,229,989 cells per milliliter (cells/ml). These cell densities exceed the recreation health-based threshold for a Warning Advisory. The reservoir remains under a Warning Advisory based on microcystin levels and cyanobacteria cell-count concentrations.

Warning Advisory for Panguitch Lake

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. Advisory actions:

  • Do not swim or water ski
  • Do not ingest the water
  • Keep pets and livestock away
  • Clean fish well and discard guts
  • Avoid areas of scum when boating

Update August 15, 2018

Lab results from the Utah Public Health Lab (UPHL) for the sample collected at the Panguitch Lake North Boat Ramp on August 8, 2018, showed microcystin levels of 8.6 micrograms per liter (µg/L) and 0.19 µg/L of anatoxin-a. Toxin levels for both anatoxin-a and microcystin exceed the recreation health-based threshold for a Warning Advisory.


Update August 14, 2018

Panguitch Lake August 7, 2018

Panguitch Lake August 7, 2018

The Division of Water Quality (DWQ) observed a cyanobacteria bloom on interpolated satellite imagery and visited Panguitch Lake on August 7, 2018. The monitoring crew visited two sites on the north side of the lake and one site on the south side of the lake. The bloom appeared to be predominantly in the northeastern portion of the lake. The cyanobacteria were clumped into small masses floating on the water.

Toxin strip tests for a sample taken at the north boat ramp were non-detect for anatoxin-a and invalid for microcystin. The sample has been delivered to multiple labs for further analysis.