Pump-and-treat is a common method used to clean up contaminated groundwater. In this process, water is pumped from the ground, where it may contain pollutants, and then treated to remove harmful substances. The cleaned water can either be returned to the environment or used for other purposes. This technique is often employed at sites affected by industrial activities or hazardous waste. While pump-and-treat can effectively reduce contamination levels, it may take a long time to achieve desired results, and ongoing monitoring is necessary to ensure the groundwater remains safe for use.