COVID-19: Offices of the Utah Department of Environmental Quality are open. In an effort to reduce the spread of COVID-19, we are limiting person-to-person contact. Please contact DEQ here to conduct business.

Pineview Reservoir Algal Bloom Monitoring 2020

Harmful algal bloom monitoring has ended for the season. Regular sampling updates to the Utah Recreational Water Monitoring Map will resume in spring 2021.

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.

Update November 2, 2020

The Warning Advisory for Pineview Reservoir has been removed as a result of the end of the sampling and monitoring recreation season.

The Utah Division of Water Quality’s water recreation season runs from May 1 through October 31. At this time, no further monitoring or sampling for harmful algal blooms or waterborne pathogens at priority water bodies will be conducted until May 2021.

This does not mean that the potential for harmful algal blooms or waterborne pathogens has ceased. Please remain aware while recreating in or near water bodies and for information on how to keep yourself, your family, and your pets safe, please visit:


Update September 15, 2020

Weber-Morgan Health Department has issued a Warning Advisory for Pineview Reservoir. On Friday, September 11, 2020, WMHD staff visited the reservoir and observed a bloom of varying magnitude at the main boat ramp, at the end of Old Post Road, Cemetery Beach, and Anderson Cove.

On September 11, the DWQ HABs monitoring team visited Pineview Reservoir. The monitoring team observed a cyanobacteria bloom (HAB) at the NW Point and the boat ramp. Toxigenic cyanobacteria cell count densities samples were taken and results are pending.

The DWQ HABs monitoring team will return to the reservoir this week to monitor and sample.

Pineview-closeup, September 11, 2020

Pineview, September 11, 2020
Click for larger version.

Update September 4, 2020

On August 26, 2020, the DWQ HABs monitoring team visited Pineview Reservoir. The monitoring team did not observe a cyanobacteria bloom (HAB) at the Middle Swimming Beach. The team will be out next week to monitor and sample this reservoir.


Update August 19, 2020

On August 19, 2020, the DWQ HABs monitoring team visited Pineview Reservoir. The monitoring team observed a cyanobacteria bloom (HAB) at the Middle Swimming Beach and Cemetery Point. Toxigenic cyanobacteria cell count densities samples were taken.

Results delivered from Phycotech on August 28, 2020, show the presence of toxigenic cell count densities below Recreational Health Threshold for an advisory.


Update July 21, 2020

On July 21, 2020, the DWQ HABs monitoring team visited Pineview Reservoir. The monitoring team did not observe a cyanobacteria bloom Anderson Cove Beach, Cemetery Point, Middle Inlet Swimming Beach, NW Point, or the West Boat Ramp. The monitoring team will return next month or if there is a report of a suspected HAB.