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iWhen soul washes Into the water, lt cames Wll'h |t some of the many pathogemc m
croorgonisms that inhabit it, but these microorganisms find water an inhosprtable en-t
vironment because it usually does not contain enough organic matter to 5UPP°I"d
their growth. Swimmers are therefore protected from diseases to which they WOU
d
otherwise be exposed. But it a pond or lake becomes eutrophic or heavrly pollutef
with organic matter, it may acquire the ability to support the growth of some °
these microorganisms and the protective barrier may break down.
168
Drinking Water