Geology and hydrochemistry of shallow aquifer in Kubang Gadong, Pasir Mas, Kelantan.

Well water is a renewable natural resources was used most people in northern part in of Kelantan state for drinking an agriculture purpose. The study area is northern part of Kelantan state lies between latitude E 06008‟52.61‟‟ and E 06004‟32.88‟‟and longitude N 102004‟32.44‟‟ and N 102009‟25.95‟‟. The present research was focused on the analysed psychochemical parameter of groundwater for quality to study the suitability of domestic well which for drinking purpose.The analyze of major ion were bicarbonate, chloride, sulphate, potassium, sodium, calcium and ferum and for in-situ parameter were pH, temperature, turbidity, total dissolve solids and electrical conductivity were determined respectively. The major cation was using Atomic Absorption Spectrometer (AAS) in Universiti Malaysia Terengganu (UMT) by ion concentration, major cation was using by titration and gravimetric analysis. The well water samples were collected in Kubang Gadong, Pasir Mas. The TDS parameter reading shows all the samples water were classifying freshwater with range 42 mg/L until 250 mg/L which permissible the standard by W.H.O. and M.O.H guideline for drinking purpose. The groundwater facies was interpreted by using piper trilinear diagram. In this study area, the classification of water dominantly show alkali bicarbonates. This can be proven by the highest value of bicarbonates.