How do you know if a lake is healthy?

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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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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Smelly or Discolored Water The smell or appearance of water can also indicate water pollution. Water contaminated with sulfur or certain bacteria will emit the smell of rotten eggs. High iron levels give water an orange color. High manganese levels will cause water to look purple or black.

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Pools also tend to be much cleaner than natural lakes. This is because most pool owners take extra care to make sure the pool is sanitized, oxidized, and pH balanced on a regular basis. You're far less likely to pick up an infection from swimming in the local pool.

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Fast-moving currents, waves and rapids, even in shallow water. Hazards, such as dams, underwater obstacles, or rocks and debris. Vegetation, animals and fish. Drop-offs that can unexpectedly change water depth.

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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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