Abstract

• The research area, Mayangone Township is situated on the Shwedagon-Mingaladon ridge. The topography of the research area is slight moderate rolling plain and it gently slope towards the west. This area is about 62.49 square kilometer. The research area is underlain by Recent to Pleistocene age valley fill deposit and Pliocene age Arzarnigon sand rocks. Arzarnigon sand rocks are medium to coarse-grained sand rocks, and sometime gritty. The sources of water supply are water from tube well and reservoir (Gyobyu reservoir). The main aquifer in western part is valley filled deposit and in the middle part it is Arzarnigon sand rock. The yield of valley filled deposit is 2000 to 4000 gallons per hour. pH is mostly about 7.77. TDS is 380 ppm. Total salinity is low and electrical conductivity (E.C) is always not more than 280 μ mho/cm. Iron content rising up to 6 ppm, is encountered. The concentration of chloride ion is widely distributed in most of the water of the studied region and the amount present in groundwater is relative higher than other anions. The results analyzed by KURLOV'S method and PIPER method can classified the water types. Groundwater is classified on the basic of total dissolved solid (T.D.S). According to WHO Drinking Water Standard, the groundwater of the research area is suitable for the drinking water.