Along with the diagrams are captions, describing each step of the process in detail. At OCWA, we take the responsibility of providing reliable water services very seriously. OCWA is the largest provider of clean water services in Canada, offering its clients environmentally responsible service and a level of technical expertise which is second to none. In large lakes, these pipes may extend hundreds of feet from the facility. Where necessary, chlorine is used to keep zebra mussels from colonizing in the system.
Chlorine is added to the incoming water to kill micro-organisms.
Alum and lime may also be added. Alum concentrates suspended particles such as silt to aid their removal. Lime changes the pH level where required. The Chemicals are mechanically mixed into the water before moving on to the flocculating basin. The flocculating basin stirs the water to concentrate suspended particles.