This study was conducted in July 2024 to determine the extent of the influence of the distance between the seashore and deep groundwater wells on the properties of well water. A total of 33 samples were collected from eleven wells, along with 6 reference samples consisting of fresh water and seawater. Several chemical tests were made, including pH, total dissolved solids (TDS), chlorides, and sulfates. The maximum concentrations in these wells were 8.04, (3095, 2004, 1223) mg/L, respectively. The percentage of these elements' concentrations relative to seawater concentration was calculated, showing maximum ratios of 8.86% for TDS, 21.22% for chlorides, and 67.56% for sulfates. Additionally, the results of groundwater concentrations were compared to Libyan standards, revealing that they exceeded permissible limits except for PH. However, none of the groundwater concentrations reached the seawater level................... Keywords:................. groundwater wells, PH, total dissolved solids (TDS), chlorides, sulfates.