I reported previously (3 times) on the Hydro-Optic Ultraviolet technology of Israel’s Atlantium that purifies contaminated water systems. It has recently been installed at the hydroelectric Hoover Dam to help prevent an invasive species of mussel from choking pipes.
https://www.timesofisrael.com/israeli-tech-chosen-to-kill-off-invasive-mussel-species-at-hoover-dam/