Industrial impact on groundwater quality with special reference to Cr and Pb in coastal aquifers.

The present investigation has been carried out in the Ottapidaram taluk to evaluate the suitability of groundwater for drinking purposes and to assess the non-carcinogenic health risks. Twenty groundwater samples were collected, and the major physicochemical parameters were measured along with the heavy metals lead (Pb) and chromium (Cr). The analyzed anions and cations follow the average dominance order, Cl  > PO  > SO  > NO  > F, and Mg  > Ca  > Na  > K, respectively.