AWWA ACE92157

Nitrification in chloraminated water systems is being reported more frequently as the popularity of chloramine secondary disinfection grows. Nitrification is often associated with losses in chloramine residual, increased bacterial growth, and other symptoms. Nitrification incidences most often occur in areas of the distribution system that have long detention times and are usually associated with warmer water temperatures. As part of an AWWA Research Foundation project on the Occurrence of Nitrification in Chloraminating Water System, a telephone survey was performed to gather nation-wide information on the occurrence of nitrification, monitoring for nitrification, nitrification control practices, and water treatment data. This information will be used to determine the extent and significance of nitrification in the US. Other parts of the study include Nitrification Control Case Studies and a Laboratory Method for Controlling Nitrification with treatment.