Here’s where it gets interesting. RO doesn’t just remove the bad stuff; it also removes the good stuff. Calcium, magnesium, and potassium—the minerals your body craves—are filtered out too.
What Is Reverse Osmosis Water? | Living Whole
This is why some people complain RO water tastes flat or “dead.” It’s literally too pure. A 2026 study in the Journal of Water and Health noted that drinking deionized water long-term can leach minerals from your own body if you’re not supplementing.
Sneaky workaround: Many modern RO systems include a remineralization filter that adds back a pinch of minerals post-filtration. Look for that feature if you’re shopping for a unit.
Microplastics and Bacteria: Tiny Threats, Big Solution
You’ve heard the news: microplastics are everywhere—in the ocean, in your shellfish, and yes, in your tap water. RO membranes are your microscopic shield. They block particles larger than 0.0001 microns, which includes bacteria, viruses, and even the tiniest plastic fibers.
A 2026 report by Orb Media found that 83% of tap water samples from around the world contained microplastics. RO systems can reduce that number to near zero. Think of it as a digital detox for your tap.
But caveat emptor: RO doesn’t remove all viruses (like hepatitis A) unless paired with UV light. For paranoid travelers or off-grid dwellers, a combo RO+UV system is the gold standard.
