I would appreciate it if some of the experts could recommend approaches to cleaning up my well water. Here is the analysis. I do not have Arsenic speciation numbers. PH - 8.3 Alkalinity - 180 mg CaCO3/L Chloride - 39 mg/L Hardness - 49 mg CaCO3/L Calcium Hardness - 31 mg CaCO3/L Sulfate - 29 mg/L TDS - 280 mg/L Nitrate + Nitrite - 0.5 mg NO3 -N/L Copper - 0.014 mg/L Iron - 0.02 mg/L Manganese - 0.004 mg/L Zinc - 0.005 mg/L Sodium - 88 Potassium - 1.3 Calcium hardness - 12 mg Ca/L Magnesium hardness - 4.6 mg Mg/L Arsenic - 0.017 It will be a whole house filter. Maximum flow rate of about 10 gpm (rated flow rate of particulate filter preceding the equipment under discussion here). Assume about 6 people in the household.