The use of gas chlorine, and gas sulfur dioxide in the wastewater treatment industry, is slowly becoming a disinfecting method of the past. In today’s water treatment world, the use of these two highly potential dangerous gases, raise several safety concerns. Along with these safety concerns for the public, treatment plants must meet strict requirements in order to use these chemicals. Now that stringent demands need to be met on these chemicals, many private and public owned water and wastewater facilities have noted that the risk of using these two gases, for disinfecting, are risky and not worth the potential of harming the public, the plant personnel and the environment.