Almost. We’re talking 95–99% removal rates. That’s not 100%, but it’s close enough to make seawater drinkable. The U.S. Navy uses these things. Submarines rely on them. If it’s good enough for nuclear subs, it’s good enough for your kitchen counter.
One funny detail: the leftover brine is super salty. It’s called reject water. It’s basically the “you can’t sit with us” outcast. Most systems flush it down the drain. Sorry, fish.
Here’s a wild fact: reverse osmosis was invented in the 1950s by researchers trying to separate uranium isotopes. Uranium. Then someone said, “Hey, let’s try salt.” And now we have fancy faucets. Science is weird.