I am actually not from North America so don't think it will be that easy to find out the tap water content. I did check the bottled water label and it says it has Ca 176,6 Mg/l, Mg 78,65 Mg/l, K 7,56 Mg/l, Na 33,47 Mg/l, Cl 9,9 Mg/l, SO4 32,82 Mg/l, HCO3 10,37 Mg/l, pH 5,99.
As for the nutes...