I'm pretty sure there's a map you can look up online that shows whether or not your region has hard water. I can't find it at the moment but perhaps you could Google around and see what you find.
2c/3a, dense, fairly coarse, normal porosity and elasticity, just below shoulder
Low poo: Giovanni 50 50
Co-wash: down under naturals, tresume naturals
R O: Tresume Naturals
L I: Giovanni Direct, KCKT
Stylers: cjccccl, cjpp, jcrr, brhg
Oils: coconut, argan or evoo