Colorado Springs, Colorado, enjoys some of the highest quality drinking water in the country, with most of its water coming from high country snowmelt. Despite its pristine origin in the mountains, the water at the far end of the distribution system is prone to developing trihalomethanes (THMs) due to low turnover and high water age. Armed with water quality lab results, the staff at Colorado Springs Utilities graphed the data to pinpoint the precise location of the highest occurrence of THMs in the distribution system in an effort to be proactive in reducing THM levels. The utility staff had developed numerous disinfection by-product (DBP) mitigation strategies over the years, including an annual distribution system flushing program, treatment process modifications, reduced tank storage levels, and on-site chlorine boosting to allow for reduced chlorine dosing at the water treatment plant itself. None of these strategies reduced the THMs to an acceptable level.