Heavy metal toxicity studies were conducted using water samples collected in 2019 and 2020 from Parangipettai, Pazhaiyar, Poompuhar, Karaikal, and Velankanni. All of these samples were collected in the summer, either after or right before the monsoon hit. The samples were taken at a location a kilometre or two inlands from the shore, where two streams converged. Cadmium, chromium, copper, iron, nickel, lead, and zinc are the PPM heavy metal parameters. The sea confluence point has the highest concentration of iron pollution and heavy metals. The laboratory has implemented quality control and assurance procedures to guarantee the reliability of the results. Methods such as standard operating procedure adherence, standard calibration, blank analysis, etc. Analyzing duplicates and piecing together newly added components. Each experiment was repeated three times, with the average result used for analysis. To eliminate bias, we used the same statistical procedures on all samples. Each chemical element was analysed using the same methods as those used by the analytical laboratory.