Why is it important to test for heavy metals in water samples?

Testing for heavy metals in water samples is crucial because these substances are indicators of chemical contamination that can pose significant risks to human health and the environment. Heavy metals such as lead, mercury, arsenic, and cadmium can have toxic effects even at low concentrations. They can accumulate in living organisms, leading to a range of health problems, including neurological damage, kidney disease, and other systemic issues.

Moreover, heavy metal contamination often results from industrial processes, mining activities, or improper waste disposal, which makes their detection important for environmental monitoring and public safety. Identifying the presence of heavy metals helps regulatory bodies implement necessary measures to protect water quality and ensure that it is safe for human consumption and ecosystem health.

In contrast, options referring to enhancing plant growth, determining aesthetic quality, or regulating water temperature do not accurately reflect the primary health and safety concerns related to heavy metals in water.