Here’s the catch: a TDS meter does not measure safety. It only measures dissolved stuff. Not bacteria. Not viruses. Not pesticides.
A glass of water could be 100 ppm and full of deadly germs. Or it could be 300 ppm and perfectly safe spring water. The meter is silent on the scary stuff.
So, treat it like a curiosity tool, not a health certificate. It’s for fun, for experiments, and for winning arguments with your know-it-all friend about tap water.
Go find a glass of water. Stick the meter in. Watch the number dance. Be curious. That’s the whole point. It’s just water, but now you know its secret handshake.
