You got it. That's the stuff you've been drinking all these years. Can't be good for you.
I live in the country, I get a chalky substance from the water I distill. It's lime.
Years ago I had to replace a water heater. It was only a 40 gallon job. Seemed like it weighed a ton. The new one was nice and light. I looked inside the old one. That'll convince you to drink only distilled water. I don't want all that crap going in me.