Glad to hear from the locals. I live in Aurora and I too have City water. The quality is pretty good, but I use a RO anyway.
One thing to consider, at least in Aurora, the city does add and treat the city water. My water had traces of silicate and phosphate, but nothing crazy. If you call them, they will provide you with a lab report of the water contents.
I was given this tip years ago from a friend and got most of the info I needed after a few calls. It was hard finding the right person to speak with at first, but they directed me. They mail me an newsletter every year now with water data. I am not a chemist, so most of the info doesnt help. Good luck
Drop me an email if you want to trade sometime
Dave