Groundwater Quality identification in the shallow aquifer of Thanjavur district, regions based on the physicochemical parameter such as EC, pH, Ca, Mg, Na+K, CO3 , HCO3 , Cl, SO4 and TDS were demarcated the chemical features such as RSC, SAR, PI, MR, NCH, CR, Gibbs1, Gibbs2, CAI1, CAI2, NA%, TH were found different zones for irrigation, industrial and agricultural purposes were identified for further groundwater resource development. Water samples have collected 50 locations at various level such as bore and open wells and analyzed physiochemical parameters. Most of these samples are found to be drinking, irrigation, agricultural purposes and a few locations are found to be not suitable for domestic purposes. Out of 50 samples there are 5-10 samples are not suitable for drinking purposes remaining all locations well suited for irrigation and agricultural purposes.
