FWIW Mort, a few years back I asked my bottled water company for the analysis and they emailed it to me – no problem. It is reverse osmosis with added back minerals, which they listed in milligrams (and darn few of them, to boot). No chlorine (obviously) and the water originates from a deep artesian well. My water is as hard as can be (without a softener it immediately stains toilets, tanks, shower stalls, etc…), so I don’t even use it diluted.
It does and it doesn’t. Your water test is only a snap shot of what your water was like when you took your sample. How much it removes the guesswork depends on how consistent the mineral levels in your water supply are.
But I think it is better than nothing, I had mine tested and probably should again to see if it has changed. Any changes could be seasonal or year to year though, so it would really take constant testing to know for sure.
Get yourself an inexpensive conductivity/TDS meter. Compare the TDS of your brew water to your report. That way you’ll have some gage of how much you water quality has changed since you sampled it for testing.
Well water (particularly deep wells) doesn’t change a whole lot. Surface water (rivers, lakes, reservoirs) can change radically, quickly, with changes in the weather.
Mine is 280’. In the spring I get a couple weeks of cloudy water during runoff from Mt Adams but then it clears up again. I used store water during that last year. Next time I’ll build from distilled.