AWWA WQTC71511

This powerpoint presentation begins by providing a brief overview of point-of-use (POU) devices and NSF/ANSI 53, a recognized standard that covers health effects specifically for POU devices, and can include lead (Pb) removal. Project objectives included the following: compare dissolved and particulate Pb removal efficiency for diverse types of POU devices (pour-through pitchers, tap-mounted, under-the-sink); evaluate metal removal by pour-through pitchers (Pb, Cu, Ni, Cr); assess Ag leaching by pour-through pitcher filters; measure the effect of POU filters on water quality parameters at the effluent; evaluate the effect of filter nitrification on the dissolution of Pb particles trapped in the filter; and, evaluate the efficiency and applicability of under-the-sink POU devices to solve dissolved and particulate Pb challenges in large buildings. Study methodology included the following 5 experiments: tested metal removal by pour-through pitchers, with and without additions of Pb, Cu and Cr in feed water; tested pour-through pitchers for Pb_part removal, and measured the effect of filters on NH₃-N and pH; same as (I) but in real household using time and without any metal addition in feed water; compared Pb_diss and Pb_part removal for 3 types of POU using a pilot (3 pitchers, 2 tap-mounted devices, 2 under-the-sink devices), and evaluated the effect of POU filters on water quality parameters at the effluent; and, tested the applicability (cost-efficiency) of under-the-sink POU devices in a large building presenting high levels of Pb_diss and Pb_part. Includes figures.