People on globe are under tremendous threat due to undesired changes in the physical, chemical and biological characteristics of air, water and soil. Due to increased human population, industrialization, use of fertilizers and man-made activity water is highly polluted with different harmful contaminants. Natural water contaminates due to weathering of rocks and leaching of soils, mining processing etc. It is necessary that the quality of drinking water should be checked at regular time interval, because of contaminated drinking water, human population suffers from varied of water borne diseases. The availability of good quality water is an indispensable feature for preventing diseases and improving quality of life. It is necessary to know details about different Physico-chemical parameters such as Hydrogen ion concentration, Electrical Conductivity, Total Dissolved Solids, Total Hardness, Calcium, Magnesium, Sodium, Potassium, bicarbonate, Chloride, Sulphate, Phosphate, Dissolved Oxygen, Biochemical Oxygen Demand, Chemical Oxygen Demand etc. for testing water quality. Yerraguntla area of YSR kadapa district was selected to determine the groundwater quality in monsoon and summer seasons. In the present investigation, the results showed that most of the Physicochemical parameters exceeded the permissible limits of WHO. The water quality index showed that groundwater is not suitable for drinking purpose in all locations of the study area. The correlation coefficient (r) showed the inter dependency of various parameters that influence groundwater quality. Piper tri linear diagram showed that the groundwater of the area contains Ca-HCO3 type of salts. So, it is necessary to adopt sound water purification methods in the study area.
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