Distilled water wins for absolute purity—it’s the sterile gold standard for medical equipment, CPAP machines, and car batteries. You wouldn’t drink it for years on end, though, because it lacks electrolytes and can leach minerals from your body if you’re not careful.
Reverse osmosis is the practical champion for daily drinking. It removes most contaminants but leaves behind trace minerals (depending on the system), making it a middle-ground MVP. Many modern RO systems add a remineralization filter just to keep things balanced.
Here’s a quick cheat: if you’re making fancy coffee or baby formula, use distilled. For your everyday hydration and smoothies? Go RO. Your taste buds will thank you, and your Keurig won’t scale up like a limestone cave.
Reverse Osmosis versus Distilled Water - My Pure Water
Practical Tips for the Curious Sipper
Don’t buy plastic jugs for either. Invest in a countertop distiller or an under-sink RO system—both pay for themselves in a year and save the planet. Pro tip: add a pinch of sea salt or a slice of lemon to distilled water to resurrect its flavor.
If you’re a Home Edit fan, label your water jugs clearly. Distilled is for your iron, RO is for your glass. And if you ever feel fancy, try a water sommelier test—yes, that’s a real thing. Distilled scores low for “mouthfeel,” RO scores higher for “clean finish.”
One weird fact: distilled water can actually absorb carbon dioxide from the air, making it slightly acidic (pH ~5.8). RO water stays closer to neutral. So your stomach doesn’t really care, but your espresso machine does.
