Not in Denver, but I test ppm with water tester and I test acidity with pH test strips. I have an RO system in my house. I usually add minerals I get from the brew store, a little more for stouts according to what I’ve read.

I made what I call a Dirty Americano = two double shots of espresso (instead of adding hot water to espresso), in my espresso machine.

The Perfect Storm - the whole thing ended up being speculation from their last radio call in.

Spiral notebook I keep in the bottom drawer of my office