During 1993, in the United States, 400,000 people fell ill in Milwaukee, Wisconsin, after drinking tap water containing a microbe that was resistant to chlorine.
1993. aastal haigestus Milwaukees (Wisconsin, Ameerika Ühendriigid) 400000 inimest, olles joonud kraanivett, milles oli kloori suhtes resistentne mikroob.