Pollution Signs in a Pond

Question: What are the signs that a pond or lake is polluted?

Answer: Generally there’s environmental indicators. Fish and frog are generally the first to be affected by some kind of pollutant. You have visual indicators, which are: general color, clarity change, particularly if it’s sudden; or excessive growth of algae or aquatic vegetation. Generally, any extreme change from the norm is an indicator of pollutants.

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