The treatment of water utilized in a power is critical for reducing boiler failures. As boilers generate steam or water is evaporated by a cooling tower, dissolved minerals accumulate and eventually lead to corrosion of boiler tubes and heat exchanger leaks. To properly control and conserve the chemical additives used to inhibit the costly build-up of deposits, and to determine appropriate boiler blow down schedules, continuous on-line pH and conductivity monitoring of boiler and cooling water is essential.