7.1 TDS mg/l, 7 mg/L Na, 1 mg/L Cl 2, 2 mg/L SO 4, 0.74 mg/L Mg, Ca 5.5 mg/L, pH 6.9 1.Rainwater 2.Seawater 3.Lake Water 4.Groundwater 1.Rainwater 2.S