That is a water quality report, containing information defined by statute, and is not what you need. There may be a different document online called something like "water analysis" that has what you need. If not, there are people who know what you need to know and anecdotes suggest that it can be anywhere from very easy to impossible to get it from them.
First step is to call up the water department. Make sure you know what you need (I assume Ca, Mg, K, SO4, Cl, CO3 and alkalinity) and make sure you get the units the measurements are in.
If that fails, send a sample to Ward Labs.
Alternately, just buy RO and work from there.