Harmful Algal Blooms Home

The Division of Water Quality will resume monitoring for harmful algal blooms and waterborne pathogens in summer 2022. HABs may still be present in Utah’s water bodies during the fall, winter, and spring. If you recreate during this time, avoid areas of scum, know what to look for, and learn how to protect yourself and your family, including pets

Please Note: This map provides current data on harmful algal blooms AND waterborne pathogens. DWQ does not monitor all the sites on the map for both types of contaminants.

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Monitoring Locations
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Health Watch
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Advisory Warning
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Danger Warning

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.

Protect Your Dog

Harmful algal blooms (HABs) develop when naturally occurring cyanobacteria in the water multiply very quickly to form green or blue-green water, scum, or mats. These blooms can produce potent cyanotoxins that pose serious health risks to humans, pets, and livestock.

How To Stay Safe

  1. Don’t swallow water when swimming.
  2. Wash hands with clean water before eating or preparing food.
  3. Clean fish well and discard the guts.
  4. Keep animals away.
  5. Recognize the signs of a bloom, and when in doubt, stay out.
Protect Yourself

Visit HABs Photo Gallery

See examples of HABs in Utah in the photo gallery.

Protect Yourself

Protect Yourself

Learn about health risks to people and pets exposed to algal blooms and what you can do to recreate safely.

Learn about HABs

Learn About HABs

Got questions? Find more info about harmful algal blooms.

Contact Information

Ben Holcomb, (bholcomb@utah.gov) Manager, Standards & Technical Services
(385) 271-4484