Harmful Algal Blooms Home

Take time before playtime: Before you enjoy Utah’s rivers, lakes, and reservoirs, check water quality conditions here and plan safe recreation.

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.

Monitoring
Locations

Health
Watch

Advisory
Warning

Danger
Warning

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.

Report a Bloom

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

Call Utah Poison Control Center

Call the Poison Control Center

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

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.

Visit HABs Photo Gallery

See examples of HABs in Utah in the photo gallery.


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

Got questions? Find more info about harmful algal blooms.

Contact Information

Dr. Hannah Bonner (hbonner@utah.gov)
Recreational Health Advisory Program Coordinator
(385) 258-6057