I just noticed somebody had created a new water-filtration tag. It was only used on two questions, both asked by the same person.
The first two fit perfect but the last one seemed a bit off. We have a tag for water but it's a bit too specific in its current form, tap-water.
Now water-filtration isn't a great tag name because the best ways to turn bad water into good water require other methods instead of or in addition to filtration. "Water purification" would cover those.
But for our site I don't think 'food-and-drink' + 'tap-water' + 'water-purification' is the best way to divide up the problem space now.
I think 'water-purification' would be good on outdoors.SE but too specific for one narrow part of a small range of related travel problems on travel.SE
What do we think?