What is it called when pesticides enter waterways from run off?

When pesticides enter waterways from runoff, it is commonly referred to as "agricultural runoff" or "pesticide runoff." This phenomenon occurs when rain or irrigation causes pesticides applied to agricultural fields to flow into nearby rivers, lakes, or streams. This runoff can lead to water pollution, negatively impacting aquatic ecosystems and potentially harming human health. Efforts to mitigate this issue often focus on buffer zones, responsible pesticide application, and improved agricultural practices.