Microbiological water pollution
Microbiological water pollution is usually a natural form of water pollution caused by microorganisms.
Many types of microorganisms live in water and cause fish, land animals and humans to become ill. Microorganisms such as:
Serious diseases such as cholera come from microorganisms that live in water. These diseases usually affect the health of people in poorer countries, as they do not have the facilities to treat polluted water.