Matt Warner Reservoir Recreational Monitoring 2021

Report a Bloom

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

Call Utah Poison Control Center

Poison Control (800) 222-1222

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

Update October 18, 2021 (HABs)

The Warning Advisory for Matt Warner Reservoir remains in place.

The Tri-County Health Department visited Matt Warner Reservoir on October 13th. Harmful algal blooms were observed at the boat ramp. Cyanotoxin and cell density samples were collected, and results are pending. DWQ will continue to watch Matt Warner Reservoir closely and post updates.


Update September 28, 2021 (HABs)

The Warning Advisory for Matt Warner Reservoir remains in place.

Samples taken from the reservoir on September 21st contained toxigenic cyanobacteria cell densities at 34,506 cells/mL of Microcystis, which is below the UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL. DWQ will continue to watch Matt Warner Reservoir closely and post updates.


Update September 22, 2021 (HABs)

The Warning Advisory for Matt Warner Reservoir remains in place.

The Tri-County Health Department visited Matt Warner Reservoir on September 21st. Harmful algal blooms were observed at the boat ramp, west boat launch and north shore. Cyanotoxin and cell density samples were collected, and results are pending. DWQ will continue to watch Matt Warner Reservoir closely and post updates.


Update August 17, 2021 (HABs)

The Warning Advisory for Matt Warner Reservoir remains in place.

Samples taken from the reservoir on August 11th contained toxigenic cyanobacteria cell densities at 8,787,449 cells/mL, which is above the UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL. DWQ will continue to watch Matt Warner Reservoir closely and post updates.


Update August 12, 2021 (HABs)

The Warning Advisory for Matt Warner Reservoir remains in place.

The Tri-County Health Department visited Matt Warner Reservoir on August 11th. Harmful algal blooms were observed at the boat ramp and north shore. Cyanotoxin and cell density samples were collected, and results are pending. Harmful algal blooms were not observed on the west boat launch. DWQ will continue to watch Matt Warner Reservoir closely and post updates.


Update July 22, 2021 (Waterborne Pathogens/HABs)

On July 20th, Tri-County Health Department visited Starvation Reservoir. Samples from near Knights Hollow, Indian Bay Day Use Areas, and the Day Use Area did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.

The DWQ HABs monitoring team visited Starvation Reservoir on July 21st for routine monitoring. Harmful algal blooms were not observed at the day-use area, the Indian Bay day-use area, or Knights Hollow. Cyanotoxin and cell density samples were not collected. Routine monitoring will continue monthly.


Update June 24, 2021 (HABs)

The Tri-County Health Department has issued a Warning Advisory for Matt Warner Reservoir.

Samples taken from the reservoir on June 18th contained toxigenic cyanobacteria cell densities at 106,910 cells/mL, which is above the UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL.

Keep yourself, your family, and your pets safe during a harmful algal bloom.


Update June 18, 2021 (HABs)

The Tri-County Health Department has issued a Health Advisory for Matt Warner Reservoir.

Note: This is not a formal advisory level but rather an indication that a bloom may exist or become more severe based on available information from Utah DWQ and Utah Department of Health.

The DWQ HABs monitoring team visited Matt Warner Reservoir. Harmful algal blooms were observed at every site visited. Cyanotoxin and cell density samples were collected, and results are pending. DWQ will continue to watch Matt Warner Reservoir closely and post updates.

Keep yourself, your family, and your pets safe during a harmful algal bloom.


Update June 2nd, 2021 (HABs)

The Division of Water Quality and the Utah Department of Health began monitoring for harmful algal blooms on June 1st, 2021. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.