Fealter, intensive care for your health care water. Your water supply, even though it is purified in a water plant, will always contain a certain level of bacteria and other particles/contaminants once it enters your facility. These have the common ability to anchor themselves to the internal surface of the water distribution system of your building and water-using equipment. This is commonly known as biofilm and once there it is very hard to eradicate. Waterborne pathogenic micro-organism lives in and may be released from this biofilm and consequently represent an infectious risk to your patients, guests and staff.