The Norweco Model AT 1500 UV disinfection system helps reduce bacteria levels from secondary effluent to achieve strict water-quality standards. Compact design and rigid construction minimize the required excavation for quick and easy installation, according to the maker. It is equipped with an internal current-sensing circuit that continuously monitors the performance of the UV lamp. This self-diagnostic feature is designed to protect the disinfection process from disruptions and maintains treatment quality. 800-667-9326; www.norweco.com.