Abstract <p>The study analyses the water purification capabilities of <i>Moringa oleifera</i> by treating the Yamuna River water sample with alum, <i>Moringa</i> seeds and leaves powder. The results were compared to the traditional water purification method using alum. Before treatment, the water sample had a pH of 8.5, absorbance of 0.22, total hardness of 283.1 mg/L, permanent hardness of 210.5 mg/L, chloride content of 273.0 mg/L, fluoride content of 2.5 mg/L, nitrate level of 100 mg/L, and alkalinity of 800 mg/L. After treatment with <i>Moringa</i> seed powder (2–12 g/L), these parameters values decreased, with pH ranging from 7.5±0.1 to 8.2±0.1, absorbance from 0.12±0.01 to 0.13±0.01, total hardness from 153.3 to 250.8 mg/L, permanent hardness from 127.4 to 181.4 mg/L, chloride content from 218.3 to 262.3 mg/L, fluoride content from 1.5 to 2.5 mg/L, nitrate from 10 to 100 mg/L, and alkalinity from 200 to 600 mg/L. Similarly, after treatment with <i>Moringa</i> leaf powder, the parameter values varied, with pH ranging from 7.0±0.1 to 7.8±0.1, absorbance from 0.12±0.01 to 0.13±0.01, total hardness from 106.4 to 226.2 mg/L, permanent hardness from 101.8 to 164.2 mg/L, chloride content from 208.1 to 260.0 mg/L, fluoride content from 1.5 to 2.0 mg/L, nitrate level from 10 to 100 mg/L and alkalinity from 200 to 400 mg/L. The present study highlights the characteristics of <i>Moringa oleifera</i> as a natural and effective water-purification solution, which could be especially useful in areas with limited access to safe drinking water.</p> Graphical Abstract <p></p>