I think you'll find that most of the bottled filtered/spring water distributed around the world comes from the Floridian aquifer; water you've probably used to make decent pizza with before.
First hand experience with Florida water is that it is awful! That being said, a bread baker who made commercial Italian loaves in New York-New Jersey opened a bakery in Florida and produced almost identical product. It was excellent. He did not truck in water from the northeast.
My Florida water was heavily mineralized and I had to reverse osmosis it so that I could drink it. Washing clothes and live bodies required a great deal of extra effort. Many people install water softeners, but that leads to an increase in sodium. No I am not a chemist or scientist, please correct me if I am wrong here. We generally added a water softener to the laundry machine.
Pinhole water leaks in copper are a common problem and the great brains in Sarasota decided to toss in some more chemicals to fix the problem, YUM ... glad I left several months before they did that! Spare the copper pipes, kill the humans. Since this article was published Sarasota County has announced that on September 1, 2005 they added a new polyorthophosphate blend into the Carlton Reserve water supply (serving south of Clark Road). According to David Cash, Sarasota County Utilities Manager, the inhibitor prevents pinhole leaks from forming, and, for the first time ever, extensive research shows it may even remedy existing holes. http://naca-nokomis.com/copper.faqs.6.05.htm
As to the pizza making - it is the complete and total lack of customer service in commercial establishments that rules the day. The incredible amount of turnover in retail food establishments combined with a generally older population in my opinion leads to bad pizza. I was able to make pizza at home that was very good given my antiquated equipment at the time.