After concerns about bacteria in the water, officials say this lake is safe to swim
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RIGBY — Officials say Jefferson County lake is safe for recreation after reports about the water in other nearby lakes and reservoirs.
According to a news release from Jefferson County Parks & Recreation, Jefferson County Lake is not currently experiencing a harmful algal bloom (cyanobacteria), like Ririe Reservoir.
“Maintaining a safe and enjoyable lake for the community is an ongoing priority for Jefferson County Parks & Recreation,” says the release. “Jefferson County Lake is routinely monitored and managed for algae growth as part of its regular maintenance and water-quality management strategies.”
On Monday, officials warned the public not to recreate in Ririe Reservoir after testing found high levels of toxin-producing cyanobacteria.
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In July, officials warned against recreating in the Island Park Reservoir after the Idaho Department of Environmental Quality confirmed the presence of cyanotoxins in the Fremont County reservoir.
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According to Jefferson County Parks and Recreation Director Martin Jones, Jefferson County Lake is not experiencing any toxins and has been treated to prevent cyanobacteria growth.
One of the tools used to manage algae growth is copper sulfate, an EPA-registered algaecide commonly used in lakes and ponds, according to the release.
“We treat the lake every single year in June, and it gets ahead of the algal blooms before it’s established,” says Jones.
Jones says the lake has seen a dramatic drop in attendance this week, partly due to misunderstandings about the cleanliness of the water.
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“The use of copper sulfate is part of Jefferson County’s proactive algae- management program and does not indicate that a harmful algal bloom has been detected at Jefferson County Lake,” says the release. “As with any natural body of water, conditions can change. Visitors are encouraged to use caution around water that appears unusual, including water with visible mats, scum, foam, unusual discoloration, or an unusual odor. If these conditions are observed, people and pets should avoid contact with the affected area and notify Parks & Recreation.”
For questions regarding Jefferson County Lake or its water-quality management practices, contact Jefferson County Parks & Recreation at (208) 612-6000.