What is one source of arsenic contamination in water?

• A. Decay of organic material
• B. Runoff from agricultural fields
• C. Production waste from electronics
• D. Leaking sewer lines

Answer: (C)

Production waste from electronics is a recognized source of arsenic contamination in water due to the use of arsenic compounds in various electronic components, such as semiconductors. During the manufacturing and disposal of electronic devices, these compounds can leach into soil and groundwater systems, leading to contamination. This is particularly concerning near industrial sites where electronics are produced or discarded improperly.

In contrast, while runoff from agricultural fields can introduce a range of pesticides and fertilizers into water systems, it is not specifically associated with arsenic, and organic material decay typically leads to increased bacterial activity rather than chemical contamination. Leaking sewer lines tend to introduce pathogens and nutrient overload rather than heavy metals like arsenic. Thus, the correct identification of production waste from electronics as a source is crucial for understanding environmental contamination and public health implications.