Pesticides in Streams and Groundwater

Pesticides in streams and groundwater are a major environmental concern because of their toxicity and persistence. Pesticides can enter streams and groundwater through runoff from agricultural and urban areas, wastewater disposal, and the application of pesticides in the environment. Once pesticides enter stream and groundwater systems, they can persist for several years, traveling long distances from their initial application site and affecting a wide area. Pesticides can also bioaccumulate in the food chain, meaning that concentrations build up in larger species of fish, making them more dangerous for human consumption. In addition to environmental effects, pesticides can also affect human health by causing acute poisoning or chronic health effects. As a result, it is important to reduce harmful pesticide use on farms, in urban areas, and elsewhere to protect human health and the environment.