The Pima County Regional Wastewater Reclamation Department is using the THM-100™ to optimize its chlorine injection process at its Tres Rios Water Reclamation Facility where ammonia-laden centrate is used for THM control. The THM-100 monitor enables the facility to optimize its chlorine injection process and minimize the formation of THMs in its effluent water by providing the operational staff with immediate and accurate daily reports on THM levels.