Fluoride takes part in a number of geochemical and biochemical reactions. The activity of the fluoride thus makes the ion non conservative in many occations, though the ion is included in the major ions category. Preferential enrichment of fluoride is a general observations in the coastal and estuarine environment.

The present study was conducted to analyse the physico-chemical characteristics of effluent discharged from the distillery unit of McDowell and Company situated in Varanadu at Cherthala Taluk, Alappuzha district in Kerala state. (2007)