Here’s the punchline: RO is too good at its job. It removes dissolved minerals like calcium and magnesium. You know, the stuff that makes water taste, well, hydrating. That’s why RO water can taste flat or “dead.” It’s like eating a hamburger with no salt—technically food, but your soul knows something is missing.
So you’ll often see RO systems with a “remineralization” stage that adds back the good stuff. It’s the water filter equivalent of going to the gym, losing 20 pounds, and then getting a tiny liposuction injection of muscle. We’re complicated creatures.
The Gross Truth It Reveals
Here’s a surprising fact: RO systems waste water. For every gallon of clean water you get, they usually send 3–4 gallons down the drain. That sounds terrible, but it’s actually the byproduct of squeezing water through that microscopic membrane. The waste water carries away all the bad guys. Think of it as the bodyguard’s expensive security detail—a little overkill, but worth it when you see what gets kicked out.
How to Replace Pre-filters in an RO Water Filter | HomeTips
What gets kicked out is genuinely terrifying. One study found RO can remove up to 99.9% of dissolved solids. That includes things like pharmaceuticals. Yes, that’s right—your tap water might contain trace amounts of someone else’s antidepressants. Your RO filter is basically saying, “I’m not drinking your neighbor’s Prozac, thank you very much.”
