Which of the following is a common source of non-point source pollution?

Non-point source pollution refers to contaminants that are not released from a single, identifiable source. Instead, it comes from numerous diffuse sources, often accumulating over a larger area, making it challenging to regulate and manage.

Agricultural runoff is a prime example of non-point source pollution. When rainwater or melted snow flows over agricultural fields, it can pick up fertilizers, pesticides, and sediment, transporting these pollutants into nearby waterways. This type of runoff does not originate from a single point, such as a pipe or a treatment facility, but rather from across a wide landscape where agricultural activities occur.

In contrast, industrial discharge, leaking septic tanks, and discharges from wastewater treatment plants are all associated with specific locations or facilities. These represent point sources of pollution, as they can be traced back to a specific origin, making them more manageable through regulatory measures and monitoring systems. Understanding the distinction between these types of pollution sources is crucial in addressing water quality issues effectively.