Sorry, I probably should have given a more useful response. I immediately regret this and punish myself to drinking 3 brews as penance.
Here you go:
http://phoenix.gov/WATERSERVICES/qualre11.pdf
(via
this page)
But seriously, I steer clear and I find my self to be deep into the "screw it, we're making beer, there's a large degree of tolerance" school of thought.