Evaluation of different physico-chemical parameters of ground water of village, Maniyari (Bahadurpur Block, Darbhanga District, Bihar) was carried out to study the water quality of the water samples. Samples were collected from different sources of different locations throughout the year 2019. Parameters studied were P^H, EC, TDS, Fluride (F^-), Sulphate (SO₄^-2) Chloride (Cl^-), Nitrate (NO₃^-), etc.