Try a Britta filter and pitcher. I live in the Miami Valley of Ohio and the water is pretty crummy. Our local water plant holds the water in settling ponds, then a silo type filtering & settling device. They have to haul away the "milk of magnesia" looking stuff they get out of the water.
We have had a Britta pitcher in the fridge for years. One day it dawned on me to try the filtered water since I have such a helluva time getting good lather.
I'd guesstimate about a 40-60% improvement over the tap water, and I now can try some previously used soaps and creams that didn't do so good in my tap water.