A great question, I really need to find an expert/chemist who can tell me "xx% of pharms dissolved in water are above n microns" or pesticides, etc. For now I'm stuck looking up info one at a time for naproxen, ibuprofen, etc!! There's got to be a better way than this.
I'd appreciate anybody...
I don't think there's anything to be suspicious about, the documentation I found shows it's an ultrafiltration process vs. RO. From Wikipedia:
"Reverse osmosis is similar to the membrane filtration treatment process. However there are key differences between reverse osmosis and filtration...