If micro plastics in the water supply is an actual issue long term the tap water will be shot for the whole of most places. Reverse osmosis systems are the only ones I had heard could reliably help, but I haven’t gone to extensive on looking into that. Each household may someday need under the sink or such systems if so : /. Unless we can reliably do so at treatment plants and then transport it through the lines without the water getting any back in. With many American cities having water at its current state, I don’t see that happening.