I am also in LA and had Ward Labs test my water in March of 2008. I'll post the results below; they are surprisingly close (some are even dead on) to the averages listed in the LA Aqueduct Filtration Plant column of the table you linked to.
Unfortunately, your table doesn't list sulfate and chloride, but given how close all of the other numbers are, you'd probably be ok using the figures from my report as an estimate until you get your own water tested.
My report:
Sodium: 52
Potassium: 4
Calcium: 28
Magnesium: 11
Total Hardness, CaCO3: 116
Nitrate, NO3-N: 0.4 (safe)
Sulfate, SO4-S: 14
Chloride: 65
Carbonate: <1
Bicarbonate, HCO3: 110
Total Alkalinity, CaCO3: 90
Floride: 1.08
Total Iron: 0.01
pH: 7.8