Blue-Green Algae Prompts Water Safety Alert Near Williston North Dakota

The weekend is here, and while many folks in northwest North Dakota may be looking forward to time on the water, caution is strongly advised at Epping/Springbrook Dam. The North Dakota Department of Environmental Quality has issued a WARNING for a Harmful Algal Bloom (HAB) at the site.

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This warning is more than just a precaution. It means that a significant portion of the lake is currently experiencing a blue-green algae bloom, and testing has revealed excessive levels of microcystin, a toxin that can pose risks to people, pets, and wildlife.

Toxic Risks: Why People and Pets Should Stay Out of the Water

Blue-green algae, also known as cyanobacteria, thrive in warm, nutrient-rich water. While not all blooms produce toxins, those that do—like the one confirmed at Epping/Springbrook—can cause serious health issues. Symptoms from exposure may include skin irritation, nausea, headaches, and in severe cases, liver damage. Pets are especially vulnerable because they are more likely to drink contaminated water or lick algae off their fur.

Because of these risks, officials stress the importance of avoiding contact with the water until further notice. That means no swimming, water skiing, kayaking, or paddle boarding. Pet owners are also urged to keep their animals out of the water entirely. Even minimal exposure, such as wading or letting pets splash along the shoreline, could be dangerous.

Read More: Leaf-Peeping Season Arrives: North Dakota’s Top Scenic Destinations

Late-Summer Algae Blooms: Stay Aware, Stay Safe, and Seek Alternatives

HABs are unfortunately common in late summer and early fall, when conditions are ideal for algae growth. The good news is that awareness and prevention can greatly reduce risk. For now, the safest approach is to enjoy other outdoor activities in the area while steering clear of direct water contact.

For more details on Harmful Algal Blooms and their effects, visit tinyurl.com/WMP-HABs. Staying informed is the best way to keep yourself, your family, and your pets safe.