 This study evaluated the groundwater quality in the Wadi Fatima area of Saudi Arabia. It found that the southern part of the area had high levels of TDS, CL-MG2+, and CA2+, while the central part had high-quality groundwater. Additionally, nitrates and fluorides were responsible for the high WQI scores in the samples. This study provides a cost-effective method for evaluating groundwater quality in other areas. This article was authored by Fahad Al Sheri and Kamal Abdul Rahman.