**3.2 Different elements present in the samples**

**Table 1** enlists the different types of toxic metals along with chloride in different water samples. Water samples from three locations attained a higher range of iron quantities as per the standard limits of iron concentration (0.001–0.30 mg/l). Heavy metals like Cd, Cr, Cu and Pb were found in all water samples, lesser than the permissible limits (0.001 mg/l). Nevertheless, manganese (0.32 mh/l) was found in higher concentration in Preonagar water sample than Mathpara and Harishnagar samples as compared to standard limits (**Figure 2**).
