The question is by how much? I prefilter tap water with brita and then my RO unit filters into a glass container which re-adds minerals for taste. Post-filtration, it should only make contact with two pieces of plastic (the pipe to the drip and the lid of the container. Pre-mineral it's usually under 10ppm. Can I get it any better with any other method?
Agree, that its probably good enough. I still use my RO for drinking water. I would add that most of an RO filter is pure plastic, so perhaps something there? These would be interesting things to get the numbers on. I still think using an RO filter is > than not.
