system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:My house has "osmosis filtering" but I don't know what that is so I call it rich people water. Would rich people water be usable in Flint?
gpt
A good thin film membrane will remove about 95% of the lead, eventually the membranes will get clogged. Consumer reverse osmosis systems use pretty crummy membranes, or small ones. 

Commercial and industrial RO membranes are not cheap.