US metropolitan water districts deliver 850 million gallons of drinking water a day. The water disinfection process often starts at the well pumping stations where ground water is sourced, treated and pumped to the treatment plant. Given the cost effectiveness of sodium hypochlorite versus ozone, chloramine and ultraviolet, chlorine is the disinfectant of choice for many water districts. Ultimately, those districts must decide whether they want to source chlorine from a chemical distributor or generate it on-site. The decision making criteria comes down to space, safety and capital expenditure. Suppliers can’t deliver chemicals everyday, so bulk storage tanks are required, along with the space to install and service them, and the higher liability associated with offloading and storing large quantities of chlorine. Conversely, on-site chlorine generators require 2-3 times the initial capital outlay, but they pay for themselves within three years. At this pumping station, an EchoPod ultrasonic level transmitter is measuring sodium hypochlorite that’s generated and metered into the well water as its pulled from the ground. EchoPod is reliable chlorine level measurement.