%0 Book Section %A Block, J.C. %A Sibille, I. %A Gatel, D. %A Reasoner, D.J. %A Lykins, B. %A Clark, R.M. %B The microbiological quality of water %C Ambleside, UK %D 1997 %E Sutcliffe, D.W. %F aquacomm:5323 %I Freshwater Biological Association %K Water supply; Biodiversity; Food chains; Bacteria; Invertebrate larvae; Escherichia coli %N 5 %P 63-70 %S FBA Special Publications %T Biodiversity in drinking water distribution systems:a brief review %U http://aquaticcommons.org/5323/ %X In drinking water distribution systems, three groups of living organisms are usually found in the biofilm and circulating water: heterotrophic bacteria, free-living protozoa, and macro-invertebrates. Indirect evidence suggests that protozoa grazing in distribution systems can partially eliminate biomass production and accidental microbiological pollution. This paper examines the biodiversit in drinking water distribution systems.