On Thu, Dec 4, 2014 at 4:22 AM, Martin Koppenhoefer <dieterdre...@gmail.com> wrote: > > not sure if "purity" is a good choice. Completely "pure" water is not > potable (distilled water), you'd die if you drank too much (OK, you'll also > die when drinking too much "normal" water [1], but the second "too much" is > much more than the first). >
"purity" is a judgement call. Generally those don't go well in OSM. How about tags for signage, e.g. "It's marked as potable", "it's marked as untested", "it's marked as non-potable".
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