Research Article
Mukut. M. Saikia and Hari. P.
Abstract
A total of 40 groundwater samples collected from deep tube well and bore well from Nagaon district, Assam, India were analysed for fluoride contamination, besides water quality parameters such as pH, calcium, magnesium, sodium, potassium, and major anions such as chloride, sulphate, nitrate etc. The concentration of fluoride in the water samples ranged between 0.03 and 5.68 mg/L and revealed that 42.5% of water samples contain fluoride above the maximum permissible limit. The R-squared values for the correlation of fluoride with calcium and magnesium showed a poor positive correlation, but with sodium and potassium a strong positive correlation was observed.