Groundwater contamination occurs when harmful substances seep into underground water sources, making them unsafe for drinking and irrigation. Common contaminants include chemicals from agricultural runoff, industrial waste, and leaking underground storage tanks. This pollution can affect the quality of water for entire communities, leading to health risks and environmental damage. Preventing groundwater contamination involves proper waste disposal, using fewer chemicals in farming, and monitoring water quality. Regulations and community awareness are essential to protect these vital resources. Clean groundwater is crucial for drinking, agriculture, and maintaining ecosystems, highlighting the importance of safeguarding it from pollutants.