Influence of seawater intrusion and heavy metals contamination on groundwater quality, Red Sea coast, Saudi Arabia.

Groundwater samples were collected from 115 boreholes and dugwells to document the influence of seawater intrusion and heavy metals contamination on groundwater quality of the Al Qunfudhah region along the Red Sea coast, Saudi Arabia. The groundwater quality index (GWQI), metal index (MI), and heavy metal pollution index (HPI) were calculated and multivariate analyses were conducted. pH, EC, TDS, Cl, HCO, SO, NO, NO, PO, SiO, F, NH, Ca, Mg, Na, K, B, Ba, Cd, Cr, As, Ni, Pb, Se, Sb, Hg, Cu, and Zn were analyzed and interpreted.