Analyte: Nitrate as N 3 to 10 mg/L, Nitrate+Nitrite as N (Total Nitrogen) 3 to 10 mg/L, Potassium 10 to 40 mg/L, Chloride 20 to 160 mg/L, Sulfate 25 to 250 mg/L, Fluoride 1 to 8 mg/L, Alkalinity (as CaCO3) 25 to 200 mg/L, Specific Conductance 130 to 1300 umhos/cm, Total Filterable Residue (TDS at 180 deg C) 100 to 1000 mg/L