©2016 Mahoning Valley Water Inc.  DISINFECTION      Water piped into the home must be potable.  Water is a breeding ground for an almost unbelievably large variety of organisms.  Water does not produce these organisms.  It merely is an ideal medium in which they can grow.  These organisms gain entry into water from natural sources, surface drainage, and sewage.        Research has shown that the presence of coliform bacteria indicates the entrance of human or animal wastes into water since coliform bacteria naturally exist in the intestines of humans and certain animals.  Thus, the presence of these bacteria in water is accepted as proof that the water has been contaminated by human or animal wastes.         Iron bacteria frequently thrive in iron-bearing water.  As they develop, these bacteria form reddish-brown growths which may clog pipes and reduce flow rates.  A decaying mass of these iron bacteria can cause bad tastes and odors in a water supply, and often cause extremely discolored water.            One of the most widely used disinfecting agents to insure safe drinking water is chlorine. Chlorine is used as an oxidizing agent to kill bacteria and to oxidize iron and sulphur where levels of iron exceed 10 ppm and levels of sulphur exceed 5 ppm.  The chlorine oxidizes the iron and sulphur and turns both from their dissolved state into their solid elemental form which is then filterable.                   For use in the home, chlorine is readily available as sodium hypochlorite (household bleach) which can be used both for laundering or disinfecting purposes.  This product contains a 5.25% solution of sodium hypochlorite which is equivalent to 5% available chlorine.   This form of chlorine is mixed with water to form the solution  for a chemical feed injection system.       The chemical feed injection system consists of a solution tank with a chemical feed pump that is wired to the well pump.  When the well pump kicks on, the chemical feed pump injects the chlorine solution into the pressure tank.  From the pressure tank the water enters the 120 gallon retention tank that allows the 20 minutes of contact time that is necessary to kill bacteria and oxidize iron and sulphur.  The final step in the system is the carbon filter which is used to filter out the oxidized iron, sulphur and dead bacteria, and to remove the chlorine from the water.