I live in Peoria, and never even considered using tap since I am not even willing to drink it. It tastes horrible. I have also noticed that when you fill up something large like a bathtub the water has a very blue tint to it, which would be bad in a tank.
I did however just test my tap water for you, but I didn't have any prime or anything on hand, so the chlorine could have messed up the results?
pH - 7.6
Gh - 15 degrees
Kh - <60 degrees (I didn't want to keep wasting solution)
If you need any other tests let me know, but some pet stores here sell really good water for a reasonable price.