Which of the following is NOT considered an inorganic contaminant?

The focus of this question is on distinguishing between inorganic and organic contaminants in water. Inorganic contaminants typically include metals and minerals that can be harmful to human health and are derived from geological deposits or human activities. Lead, mercury, and arsenic all fall under the category of inorganic contaminants because they are elements or compounds composed of metals that are naturally occurring or introduced through industrial processes.

Pesticides, on the other hand, are organic chemicals designed to control pests and are commonly derived from carbon-based compounds. They have a different origin and structure compared to inorganic contaminants, which is why they are classified separately. This distinction is crucial in water quality management, as the treatment and regulatory approaches may differ based on the type of contaminant present.