eli5: When people used wells for drinking water, how did they not get sick? Was there some type of filter or was the water just naturally clean?
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I have a well. The water is about 175 feet underground, in a natural cistern. All the water in there has been filtered pretty well by all the various layers of earth its seeped through. I have a simple filter on my water system that keeps my water clear of biological contaminates and I have a softener for the excess iron. I use that for showers, cleaning etc. I have a five stage reverse osmosis filter I use for the drinking water, but it’s not strictly necessary.
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