Hydrochemical Characterization and Quality Assessment of Groundwater in Hatiya Island, Southeastern Coastal Region of Bangladesh

Groundwater is a vital source of fresh water for drinking and agricultural purposes in the region Hatiya Island, Bangladesh, yet it subject to contamination by natural anthropogenic activities. Over time, has resulted variety negative effects on human health. This research aims examine groundwater hydrogeochemical characterization suitability irrigation different indices utilizing combined geochemical method, multivariate statistical approaches, geospatial analysis. Results analyses 15 samples from intermediate aquifer (60–90 m depth) represent order cations, anions, metal concentrations as Na+ > Mg2+ Ca2+ K+, Cl− SO42− HCO3− NO3−, Fe I Br Mn As, respectively. Saltwater intrusion been determined be most important process influencing chemistry groundwater. Principal component analysis, Pearson’s correlation matrix, hierarchical cluster analysis indicate that quality highly governed geogenic influences. information evaluated using index map, which found six (40%) are suitable consumption, whereas other nine (60%) unfit drinking. The parameters revealed eight (54%) excellent or good condition uses; however, seven (46%) unsuitable.