Why does untreated lake and river water not make us ill each time we swim in it?

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Swimming pools require mass amounts of chemicals and treatment to ensure it’s safe for swimming, but why not natural bodies of water? Given the amount of waste and bacteria, coupled with water creeping into the ears, nose, etc., why don’t we see more cases of infection?

In: Biology

4 Answers

Anonymous 0 Comments

Standing water can be very dangerous, regardless of it being natural or not. Pools in general can be very unhygienic due to humans being humans and losing bandaids, peeing, etc.

But standing water in nature is not great for you, either. However, like most bad things, it’s much worse if ingested.

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