coolmom42, If you simply use a swimming pool chlorine tester kit on the water coming from the faucet on city water, you'll be surprised how much chlorine is already in the water. Try it, if you'r on city water. When we lived in town, I paid the price to have my water analyzed. The chlorine content was awful ... almost scary to drink! But that did explain why all our laundry faded so quickly and whites were really WHITE without needing bleach... for 16 years! We used filtered and bottled water at home to drink to KEEP from getting the chlorine.
All I'm saying is, if you take the time to test your city water, you'll see sanatization in a whole new way.
There's nothing wrong with doing your own sanitazation method, nothing at all. But if you're on city water, more than likely, you don't need to. There again, the only difference between doing it yourself and doing it with city water, is the strength of the chlorine. The stronger the chlorine, the less time it takes to sanitize.