2022 Yes https://www-sciencedirect-com.ezproxy.lib.utexas.edu/science/article/pii/S0043135421012288?via%3Dihub Clark, Gemma G. North America Observational Exposure Study Water quality Bacteria Point-of-use filter Drinking water Bacteria Chlorine Lead These results suggest that the installation of POU filters be considered as one component of an overall strategy to decrease Pb concentrations in school drinking water that holistically considers the premise plumbing system. A 5-minute flush significantly decreased concentrations of Pb and bacteria in filtered sinks. Replacing Pb-bearing plumbing components downstream of a POU filter may also be needed to combat Pb levels in drinking water.