Which of the following is an organic contaminant?

Pesticides are classified as organic contaminants because they typically contain carbon-based compounds and are formulated from natural or synthetic organic chemicals. These substances are designed to manage pests but can pose risks when they enter water systems, potentially impacting both human health and the environment. The presence of organic contaminants like pesticides in water can lead to various health issues, including hormonal disruptions, carcinogenic effects, and other toxic responses.

In contrast, aluminum, fluoride, and chlorine are considered inorganic substances. Aluminum is a metal commonly found in natural ores, while fluoride is a mineral that can occur in nature. Chlorine, on the other hand, is a chemical element widely used for disinfection purposes. Understanding the distinction between organic and inorganic contaminants is vital, as their behaviors, regulatory standards, and removal techniques often differ significantly in water treatment processes.