That water supply is a very soft water that could easily be subject to picking up iron and manganese. That is the case, as evidenced by the water report. While the bicarbonate or alkalinity is not presented in the report, it is apparent that the values would be very low.
While ion-exchange softened water use is typically a no-no in brewing, this water has very little hardness and will not pick up a bunch of sodium in the exchange. The good thing is that this treatment will knock down the Fe and Mn content and make this a very good brewing water. Given the Fe and Mn content in that water, I'm guessing that water softeners are common in this area. It's OK to use the softened water here.