Stephen wrote:So does anyone filter the crap out of their water before using it in a ferment?
The short answer is no.
I use rainwater from my tanks, If you look in my gutters you will find an assortment of things, mostly decomposing leaves and a bit of bird shit.
Over the years Ive found dead frogs, birds, and other critters in the tanks as well as tennis balls and other kids toys just to name a few.
City and town dwellers who visit often comment on how good my water tastes straight from the tap.
Ive been drinking it for 50+ years and it hasn't killed me or anyone else yet and my washes work fine.
As far as I see it the only thing that should be in your town water would be a bit of chlorine and some fluoride.