No meter? No problem. You can still get a vibe check. Fill a clear glass with water and hold it up to the light. If it looks cloudy or has floating stuff, your TDS is probably high. Not a scientific method. But it’s a little eyeball hack.
Another trick? Let a drop of water dry on a clean mirror. If it leaves a white ring, that’s calcium. High TDS. If it leaves nothing, you’re either amazing or you have a very clean mirror. Who’s to say?
When to Filter
If your TDS is over 300, you might want a filter. A basic pitcher filter can knock it down. But don’t go crazy—you want some minerals left. Water that’s too pure tastes… flat. Like kissing a robot. Zero personality.
And here’s a fun twist: TDS meters don’t tell you if the water is safe from bacteria. That’s a whole different test. So if your reading is low but you drank from a puddle? You’re on your own, friend.
