Waterborne diseases are caused by consuming or coming into contact with contaminated water. Pathogens such as Vibrio cholerae, which causes cholera, and Cryptosporidium, a parasite, are common culprits. These diseases can result in symptoms like diarrhea, dehydration, and gastrointestinal distress. Contaminated water can also serve as a vehicle for toxins and chemicals, leading to a variety of health problems.