I know not many of you are in the Columbus, Ohio area, but I thought you might find this interesting. For the first time in the 29 years I have lived here the City of Columbus has mailed its citizens a water report. Specifically its titled Water for Living - 2005 Drinking Water Counsumer Confidence Report. As a spa owner I found a couple of things interesting and maybe a report like this is available from your munincipality. There are a lot of measurements related to drinking water but I'll highlight the ones for my area related to hot tubs.
Chlorine (PPM) 4 is allowed - actual average 1.69 with a low of .43 and a high of 2.33
Hardness - No goals set - average 101 with a low of 92 and a high of 127
PH - Allowed range of 7.0 to 10.5 Actual 7.8 with a range of 7.7 to 7.9. (I would have guessed from my test kit that it was closer to 7.3
There are 3 water plants supplying Columbus and the PH seems to remain pretty constant among them, but the one supplying my house has the softest water at 101ppm, with the other two around 120. That seems consistent with my usual tests.
FYI