Contaminated water is linked to the transmission of diseases such as typhoid, cholera, diarrhea, and polio.
Waterborne viruses and bacteria cause hundreds of millions of people to become afflicted with sickness each year. The World Health Organization (WHO) considers water-transmitted viruses to be a significant health concern worldwide.
According to the Center for Disease Control and Prevention, "Potential health effects from ingestion of water contaminated with viruses are: Gastrointestinal illness (for example, diarrhea, vomiting, cramps), hepatitis, meningitis."
Viruses that spread through water include meningitis, gastroenteritis, conjunctivitis, SARs, hepatitis A, hepatitis E, and Typhoid.