Data on the chemical composition of groundwater in aquifers within the Neogene and Paleogene deposits of the Kakhovka Reservoir region were collected and analyzed to assess the impact of natural and anthropogenic factors on their chemical composition. Spatial analysis identified three general zones with varying levels of mineralization and well yield. The first zone (mineralization of 2,000–6,000 mg/dm³, yields up to 100 m³/day) is located within the Ukrainian Shield in the Dnipropetrovsk region and partly in the Zaporizhzhia region. The second zone covers the far south of the study area – the lower Dnieper River basin in the Kherson region (predominantly fresh water, though right-bank mineralization reaches 2,000–2,500 mg/dm³, with yields of 200–1,200 m³/day). Increased mineralization in specific wells in this area stems from the inflow of highly mineralized water driven by intensive abstraction far from the Dnieper River, and seawater intrusion in coastal wells near the Black Sea. The third zone serves as a transition zone between the first and second zones, featuring mineralization of up to 1,500 mg/dm³ (occasionally exceeding 2,000 mg/dm³). Yields range from 100 to 300 m³/day, and can exceed 500 m³/day along the banks of the Dnieper River. The impact of well abstraction intensifies toward the south.
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