Harmful Algal Blooms Home

2018 Advisories

Location	Last Sample Date	Advisory Level
Deer Creek Reservoir	October 18, 2018	Warning
Scofield Reservoir	October 30, 2018	Warning
Utah Lake	October 22, 2018	Warning

2018 Monitoring Updates

Location	Last Sample Date
Bear River	August 1, 2018
Big Lake	July 19, 2018
Calder Reservoir	August 30, 2018
East Canyon Reservoir	September 10, 2018
Echo Reservoir	September 17, 2018
Gunlock Reservoir	August 8, 2018
Hoop Lake	August 8, 2018
Jordan River and Canals	September 11, 2018
Jordanelle Reservoir	September 11, 2018
Manning Meadow Reservoir	August 7, 2018
Mantua Reservoir	July 19, 2018
Matt Warner Reservoir	October 4, 2018
Mill Meadow Reservoir	October 17, 2018
Montes Creek Reservoir	August 29, 2018
Otter Creek	September 24, 2018
Panguitch Lake	October 31, 2018
Payson Lakes	September 6, 2018
Pineview Reservoir	September 10, 2018
Rockport Reservoir	June 20, 2018
Salina Reservoir	October 3, 2018
Upper & Lower Box Creek Reservoirs	July 16, 2018
Upper Kents Lake	August 9, 2018

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.

Harmful algal blooms occur when normally occurring cyanobacteria in the water multiply quickly to form visible colonies or blooms. These blooms sometimes produce potent cyanotoxins that pose serious health risks to humans and animals.

Although most algal blooms are not toxic, some types of cyanobacteria produce nerve or liver toxins. Toxicity is hard to predict in part because a single species of algae can have both toxic and non-toxic strains, and a bloom that tests nontoxic one day can be toxic the next.