Department of Environmental Quality

Learn About & Check Utah Recreational Water Quality

We monitor for two health concerns in popular Utah lakes, reservoirs, and rivers.

Recreational Water Quality Beaker (the glass kind, not the muppet) with spyglass and caution icon.

Harmful Algal Blooms (HABs)
can produce dangerous toxins that pose serious health risks to humans, pets, and livestock.

These blooms develop when naturally occurring cyanobacteria in the water multiply very quickly to form green or blue-green water, scum, or mats.

Waterborne pathogens (E. coli)
can make humans sick.

They are introduced to a water body through fecal contamination and can’t be seen with the naked eye.

Algal bloom monitoring icon

Monitoring
Locations

Algal bloom advisory icon

Health
Watch

Algal bloom warning icon

Warning
Advisory

Algal bloom danger or warning icon

Danger
Advisory

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

What is an Advisory?

Local health departments issue advisories when waterborne pathogens (E. coli) or harmful algal blooms (HABs) at the water body are dangerous for human and animal health.

There are three different levels: Health Watch, Warning Advisory, and Danger Advisory.

If you are visiting a water body under an advisory, be careful and choose only safe activities.

Health Watch

A Health Watch usually means there is evidence that either waterborne pathogens are present or a harmful algal bloom is developing.

During a Health Advisory:

  • Do not swim or water ski
  • Do not drink the water or get it in your mouth

If the Warning Advisory is due to a HAB:

  • Avoid areas of algae scum when boating
  • Keep animals away
  • Clean fish well and discard guts

Warning Advisory

A Warning Advisory usually means a threshold established by the Utah Department of Health and Human Services has been exceeded by the water body. This is a strong indication that either waterborne pathogens or a harmful algal bloom is present.

During a Warning Advisory:

  • Do not swim or water ski
  • Do not drink the water or get it in your mouth

If the Warning Advisory is due to a HAB:

  • Avoid areas of algae scum when boating
  • Keep animals away
  • Clean fish well and discard guts

Danger Advisory

A Danger Advisory means a threshold established by the Utah Department of Health and Human Services has been exceeded by the water body for harmful algal blooms. This means the bloom has become very large and/or high levels of dangerous toxins have been measured. Often a water body is temporarily closed as part of the Danger Advisory.

During a Danger Advisory:

Where do these data come from?

Division of Water Quality staff perform routine monitoring of priority lakes, reservoirs, and rivers throughout the state. These water bodies are generally visited once a month May-October and all updates are posted on the site-specific pages linked above. We also share updates from partner organizations including local health departments, National Parks, and Utah Water Watch.

Ellen Bailey

Recreational Health Advisory
Program Coordinator

We’re Here to Help!

We post conditions on this website as soon as we have new updates. Have a question that isn’t answered here? Ellen, our program coordinator, is happy to talk with you.

(801) 536-4362

ellenbailey@utah.gov

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