Is it risky to swim in a lake?

Lastly, many lakes across the world contain high levels of toxins or bacteria, which can be harmful to those who decide to take a dip. Many lakes in America are perfectly safe for swimmers, but these ones can be particularly hazardous and might warrant a second thought before plunging beneath the surface.



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Know before you go Before you head out, check online to find out if the swim area is currently monitored, is under advisory, or has been closed for health or safety reasons. This is especially important after a heavy rain.

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If there is scum or algae visible in the water, it won't be clean enough to swim in. There are also natural hazards to outdoor waters compared with pools, especially in the summer. Blue-green algae is a type of bacteria naturally found in lake ecosystems.

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Even on hot spring days, lakes, ponds, and rivers are still cold and are dangerous for swimmers. Hypothermia can occur quickly in very cold water. Summer – Water that is warm on the surface, may be much colder below. Use caution when swimming and always supervise young children playing in or near the water.

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“No swimming” signs: This one should go without saying. If there are “no swimming” signs posted near the waterway, don't enter it! Chances are, there are concealed hazards underwater that you may not notice from up above. If you see a sign posted, don't risk it—it's better to find somewhere more desirable to swim.

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Lake Drownings are Especially Common It is easier to drown in freshwater than in saltwater. Lake waters are dark and murky – it harder to spot someone who is drowning. Ice on lakes can be thinner than expected, causing someone to fall through and drown.

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A small pond is usually 4 to 20 feet deep, while lakes are typically any depth beyond 20 feet. In most lakes, the deepest spot is known as the “last drop” or “end of the lake.” The water in a small pond or a natural spring will not have any depth to it.

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