Abstract: On the basis of complete analyses of 4 groundwater samples and simple analyses of 5 groundwater samples and of in situ detection of pH, electrical conductivity and water temperature of 50 groundwater samples, the groundwater type and water quality of the Linzhu county in southern Anhui are examined. The results show that there is no phenol, cyanogen, As, Hg and Cr in the groundwater samples. Only NO-3 in some dirty water and fertilizer leakage into the groundwater, causing light contamination of the groundwater. The reasons for groundwater contamination are analyzed. Some suggestions are pointed out, like drilling a deep well, paying attention to the discharge of the dirty water. With these measurements, we hope to raise the water safety of this area.