I wont drink tea anywhere other than home as its never how I like it. Don't mind horrible coffee but not tea, and the first cup in the morning is the very best of the day.
anneasquith: You'd be surprised at how many people test the PH of their water. Obviously you're not going to walk around with litmus paper when going into cafes or restaurants.
...all the mains water is slightly alkaline. If the pH was less than 7, corrosion would be a major problem - not least for the water mains themselves....they would simply dissolve away in no time.