How to Keep Your Dog Safe from Harmful Algae Blooms in Utah Waters

Protect your pet during outdoor adventures by learning to identify toxic algae

Utah has incredible outdoor spaces to explore with your dog​, including reservoirs, rivers, and mountain streams. But as the weather warms up, it’s essential to be aware of a growing seasonal danger: harmful algal blooms. These naturally occurring algae can pose serious, sometimes fatal, health risks to pets. In partnership with the Utah Department of Environmental Quality (DEQ), Division of Water Quality (DWQ), we share what every dog guardian should know to prevent exposure and protect their pets this summer.

What Is Harmful Algae and Why Is It Dangerous for Dogs?

There are two types of harmful algae that dog owners should watch out for:

• Harmful Algal Blooms (HABs): Also known as blue-green algae or cyanobacteria, these blooms float on the water’s surface and can look like pea soup, spilled paint, or scummy foam.
• Harmful Algae Mats (Benthic Mats): These grow along the bottom of water bodies and can break loose, washing ashore where curious dogs may sniff or eat them.

Both types can release toxins that affect the liver, nervous system, or skin, posing a serious risk to dogs that drink the water, lick their fur, or ingest the algae directly.

Common Ways Dogs Are Exposed to Harmful Algae

Dogs are at higher risk of algae-related illness than humans because they are more likely to:

• Drink from contaminated water sources
• Ingest algae mats found near shorelines
• Lick algae residue off their fur or paws

Even small amounts of exposure can be dangerous. If you think your dog has come into contact with harmful algae, rinse them with clean water immediately and monitor for signs of illness.

Symptoms of Harmful Algae Poisoning in Dogs

Symptoms can vary depending on how much and how long your dog was exposed to harmful algae. In some cases, symptoms can appear within minutes.

Ingestion-related symptoms:

• Vomiting or diarrhea
• Excessive drooling or foaming at the mouth
• Loss of appetite
• Stumbling or weakness
• Difficulty breathing

Skin contact symptoms:

• Rashes or hives
• Itching or redness
• Allergic reactions

If your dog shows any of these signs, seek emergency veterinary care immediately. You can also call the ASPCA Animal Poison Control Center at (855) 764-7661 (note: consultation fees may apply).

How to Tell if Water is Safe for Your Dog

During Utah’s recreational monitoring season, you can check current harmful algae advisories on the DEQ’s water quality page.

Even if no official warning is posted, water conditions can change quickly. Learn to visually identify suspicious water:

• Harmful blooms often appear bright green, turquoise, or brown and can resemble spilled paint or floating scum.
• Harmful mats are thick, dark-colored growths on rocks or the bottom of shallow areas.

Some harmless aquatic vegetation, like duckweed or stringy green algae, can look similar but doesn’t produce dangerous toxins. When in doubt, keep your dog out of the water.

Are At-Home Algae Test Kits Reliable?

No, rapid water test kits for algae are not approved by the U.S. EPA and may not reliably detect toxins. The best defense is visual awareness and avoiding questionable water bodies altogether.

Final Tips for a Safe Summer

• Bring clean drinking water for your dog when you go hiking, camping, or swimming.
• Avoid letting them drink from puddles, ponds, or slow-moving water.
• Rinse your dog off with clean water after outdoor water play.
• Know the signs of algae poisoning and act quickly if symptoms occur.

Spending time in Utah’s beautiful outdoors is one of the best parts of pet ownership. A little knowledge and prevention go a long way in keeping your dog safe, healthy, and by your side for many future adventures.
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