Coliforms are not one kind of bacteria, but many, and they can make you sick if ingested from drinking water. But most coliforms are harmless residents of soil and will not make people sick. Some strains of E. coli, the most common fecal coliform bacterium (usually living in animal fecal material) may cause disease. Some E. coli strains found in food have been lethal. Their presence should be taken very seriously.
Your immune system also determines whether on not …