Is the Bear Lake toxic?

Looks Good! There are no current health advisories for this water body. Conditions may change quickly. Check before entering the water and know how to spot a harmful algal bloom.



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While Big Bear Lake does have algae, its cell counts rarely get high enough to be considered a bloom. To date, there has never been an algae related health incident on Big Bear Lake, including pets and wildlife. That being said, Big Bear Lake's baseline is a Caution level for the presence of algae year round.

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Swimming Rules From the Big Bear Municipal Water District: In the summer months, swimming is permitted in Big Bear Lake at your own risk! There are NO lifeguards on duty and swimmers must stay within 50 feet of the shore or within 20 feet of a private dock.

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When consuming fish from Big Bear Lake, women ages 18-45 and children ages 1-17 may safely eat a maximum of five servings per week of crappie or Rainbow Trout, or one serving per week of black bass species or Common Carp.

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Best Beaches for Swimming in Big Bear Lake. Meadow Park—in particular, McDill Swim Beach—is perfect for parents wishing to bring their children to a safe place on the lake to swim. A lifeguard remains on duty, and there are water toys, a floating dock, a snack bar, and public restrooms nearby.

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For the latest quarter assessed by the U.S. EPA (January 2021 - March 2021), tap water provided by this water utility was in compliance with federal health-based drinking water standards.

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The lake is home to alligators and crocodiles, and while fishing is allowed, getting a permit is the least of your worries.

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Specifically, a lack of nitrogen and phosphorous severely limits algal growth in Bear Lake, keeping its water clean and blue. People Changed Bear Lake?), the diverted river first flows into Dingle Swamp and Mud Lake where sediments settle out and nutrients are extracted by plants.

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Bear Lake contains abundant suspended microscopic particles of white-colored calcium carbonate (lime) that reflect the water's natural blue color back to the surface, giving the lake its intense turquoise-blue color.

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The more adventurous swimmers can find all kinds of swimming and wading spots around the lake, just remember there are no lifeguards and Lake Management (MWD) requires that you swim within 50 feet of the shore.

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It was formed by fault subsidence that continues today, slowly deepening the lake along the eastern side. In 1911 the majority of the flow of the Bear River was diverted into Bear Lake via Mud Lake and a canal from Stewart Dam, ending 11,000 years of separation between the lake and that river system.

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In the Summer time the water temperature in Bear Lake ranges from 68 to 72 degrees. In the Winter time it usually ranges from 35 to 40 degrees and only freezes over 70% of the time. Bear Lake is a great place to swim, boat, kayak, or just sit on the beach.

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Bear Lake is a natural freshwater lake on the Idaho–Utah border in the Western United States. About 109 square miles in size, it is split about equally between the two states; its Utah portion comprises the second-largest natural freshwater lake in Utah, after Utah Lake.



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Despite weighing more than 400 pounds, sumo wrestler, Kelly Gneiting, becomes only the fourth person to swim across Utah's Bear Lake and then back again.

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If you plan to camp overnight, please use one of the many public and private camping areas around the lake (see map). No camping after 10 p.m. on the public beaches or exposed bed of Bear Lake.

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How many hot days will Big Bear Lake have? A hot day in Big Bear Lake is considered to be any day above a “feels like” temperature of 83ºF. Big Bear Lake is expected to experience 7 hot days this year. Due to a changing climate, Big Bear Lake will experience 19 days above 83ºF in 30 years.

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While dogs are welcome to play and swim along the shoreline of Big Bear Lake, it's important to monitor their fun. Keep an eye on how far they're swimming and be sure they can safely return to shore. Never let your dog drink the lake water or scum along the shorelines.

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