Contaminated water is water that has harmful substances or pollutants in it, making it unsafe for drinking, bathing, or other uses. These pollutants can include chemicals, bacteria, heavy metals, and other toxins that can come from sources like industrial waste, agricultural runoff, or sewage discharge. When people consume or come into contact with contaminated water, it can lead to serious health issues, including gastrointestinal diseases and long-term health problems. Ensuring access to clean water is essential for public health and is a major focus for organizations like the World Health Organization and various environmental agencies.