Chloride of lime is first used to…
1897 CE
John Snow was the first to successfully use chlorine to disinfect the water supply in Soho that had helped spread the cholera outbreak.
William Soper had also used chlorinated lime to treat the sewage produced by typhoid patients in 1879.
In a paper published in 1894, Moritz Traube had formally proposed the addition of chloride of lime (calcium hypochlorite) to water to render it "germ-free."
Two other investigators had confirmed Traube's findings and published their papers in 1895.
Early attempts at implementing water chlorination at a water treatment plant had been made in 1893 in Hamburg, Germany and in 1897 the city of Maidstone, England is the first to have its entire water supply treated with chlorine.