Coliform bacteria and waterborne disease outbreaks

摘要: Coliform-free tap water has previously been thought to be unlikely cause waterborne disease. However, disease outbreaks (especially those caused by Giardia or Cryptosporidium) and endemic risks have reported in systems that not violated either the 1975 1989 maximum contaminant level (MCL) for total coliforms. Focusing on rule using coliform data investigative reports about outbreaks, authors compared MCL violations did experience an outbreak. Coliforms were usually found a public system during outbreak investigation, but months before outbreak, they detected only half of violation one fourth them. The rate was significantly different between community experienced not; both met MCL. To safeguard against disease, microbiological monitoring must supplemented with periodic sanitary surveys activities ensure adequate quality.