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by fuzztester 761 days ago
Well water is not safe either. It's exposed to the atmosphere, so to dust, birds (both s(h)itting and flying), and insects, etc.

Depending on the shape and structure of the well, rats can crawl inside, and lizards, and cockroaches and other insects can crawl in anyway, and poop there. and we all know about rats as a vector of many serious diseases, like the plague in said mediaeval times.