There is no simple test to determine whether or not the system is providing proper disinfection. Ultraviolet light devices are most effective when water is clear and allows the light to easily pass through. Therefore, ultraviolet light devices are often combined with other treatment devices such as mechanical filters, activated carbon filters, water softeners, and reverse osmosis systems to provide complete water quality solutions. Safety features, such as detectors that activate audio and visual lamp alarms in case of lamp failure, are available to ensure that adequate disinfection conditions are maintained. Ozonation uses ozone which is a more powerful disinfectant than chlorine.
Ozone produces no tastes or odors in the water.
However, as a gas, ozone is unstable and has a very short life so it must be generated at the point of use. Even if tests confirm that you have a bacteriological problem, before investing in expensive equipment, have your household water supply inspected by a County Health Department official. More information For more information about providing biologically safe household water, contact your local Cooperative Extension or Health Department Office.