Should you avoid swimming in lakes?

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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One other thing to be aware of if you're swimming in a freshwater lake, especially in warmer climates: The Centers for Disease Control and Prevention says that swimmers in freshwater lakes should assume brain-eating amoeba are present, although actual cases of infection are extremely rare.

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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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Look for signs of poor water quality, such as algal blooms and dirty or turbid water. Do not swim in water that smells like rotten eggs or sewage. Avoid swimming near pipes that drain into lakes or streams.

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Blue Lake (Tasman), New Zealand | The Clearest Lake in the World | Times of India Travel.

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There are some simple ways to evaluate the health of your lake without testing equipment. Water clarity is a great example. Measuring how far down into the water you can see a black and white secchi disk can give you a great index of water clarity. Plants you find in the lake can also give you an indication of health.

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