Water for public supply can be obtained from underground sources (for example, wells sunk into aquifers), or from surface sources such as purpose-built reservoirs (collecting rainwater run-off or water from streams), lakes or rivers. The quality of the water is of utmost concern for its safe consumption - the primary aim in water treatment is the elimination of any pathogenic microorganisms present. Ovivo provides a complete flow sheet for the treatment of raw water to potable water.