Ann: De.mem's Graphene Oxide Enhanced Membrane passes NSF test, page-5

Interesting they haven't sort approval for NSF61 which is one of the standards for applying the technology to the large scale filtration technology sold into drinking water plants, which is where I thought they were going with this originally. I was replaced my own under-the sink cartridge on the weekend for $45 (lasts about a year). Not sure on the marketing of the flux for domestic market since you (should) get a constant pressure from the mains supply anyway, and never found my under-the-sink unit to deliver too low a flow. Anyway we'll see what happends.