Tough question because water quality can affect pH a little bit because if you’ve been around like us and see people all over the country, tap water can actually range in pH from about a 5 to a 9. The big factor here is how much concentration are you running. Because if you look at a titration curve, the difference between a 5 and a 9 because we’re on that 10 scale seems like a lot, but you’re really going from .0001 acid to .0001 base. If you’re working in really low concentrations, your water quality might affect the pH of your solution but if you’re above 1% whatever you’re using is going to dominate the pH there. Most of these cleaning chemistries have these buffers or water softeners to tie up those ions that bring that pH down or up accordingly. That’s the job a good buffer does.