I sent a water sample to Ward Labs and my water did not match what MUD reports (at least in the link earlier in this post). I think some of my abrasiveness may come from an excessively high level of sulfates. For the last couple of batches I have diluted with about 55% RO water from HyVee so we'll see how they turn out. I live in west Omaha and here's what I got back from Ward Labs:
pH 9.2
Sodium, Na 60
Potassium, K 6
Calcium, Ca 36
Magnesium, Mg 19
Total Hardness, CaCO3 169
Nitrate, NO3-N 0.8 (SAFE)
Sulfate, SO4-S 70
Chloride, Cl 21
Carbonate, CO3 12
Bicarbonate, HCO3 60
Total Alkalinity, CaCO3 69