Nonpoint sources are best described as pollution coming from

• A. Examples of Point Sources
• B. Pollution from broad, diffuse areas
• C. Nitrate Standards
• D. Organic Chemicals

Answer: (B)

Nonpoint sources describe pollution that enters the environment from broad, diffuse areas rather than a single, identifiable discharge. This includes runoff from agricultural fields carrying fertilizers and pesticides, urban runoff washing oils and metals into streams, and sediment and other pollutants that are picked up as rainwater flows across diverse surfaces. Because the contamination comes from many different activities over a wide area, it’s not traceable to one pipe or location, which is why this description fits nonpoint pollution so well.

In contrast, a single pipe or outlet would be a point source, which is the opposite concept. Regulations about nitrate levels or organic chemicals refer to contaminants or standards, not to the way pollution enters the system, so they don’t describe the source type.