Water is a vital resource, and its quality must be regularly monitored to safeguard public health. In Senegal, packaged and tap water are widely consumed, yet their physicochemical characteristics vary and may pose health risks. This comparative study was conducted on 12 water samples collected in the Dakar region, grouped into three categories: bottled water, sachet water, and tap water; 4 samples for each. Physicochemical analyses were performed in accordance with WHO guidelines and the Senegalese standard NS 05-033. The parameters examined included pH, conductivity, hardness, alkalinity, chlorides, and total dissolved solids. Results indicate that bottled water exhibits optimal quality, with a neutral to slightly basic pH and low conductivity (<400 μS/cm). Sachet water shows similar mineralization and hardness (6？F - 7？F) to tap water but presents a potential microbiological risk. Principal Component Analysis (PCA) reveals a strong similarity between sachet water and tap water, and also Kirene is unique and stands out with its extreme dry residue. This study highlights the importance of regular monitoring and consumer awareness.
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