This study evaluated baseline groundwater quality near the proposed Direct Air Capture (DAC) facility in Kingsville, TX, USA. It hypothesized that groundwater quality in the region has remained relatively stable over time. Rainwater and groundwater data from NOAA, along with records from approximately 30 water wells, were analyzed. A detailed assessment was conducted on Well ID 8329702, which had the most extensive and continuous dataset for alkalinity, bicarbonate, pH, and hardness from 1973 to 2012. The analysis revealed a slight decline in alkalinity (−0.00006) and bicarbonate (−0.007) over time, while changes in pH and hardness were minimal. These findings provide a critical baseline for future groundwater monitoring, particularly in areas surrounding industrial facilities such as DAC plants.