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How to take Water Sample for Microbiology Testing?

In many cases for water testing specially E-coli Test of Colform bacteria test Results not seems to be satisfying as there is some how a minute mistake can ruin up your whole sample and you will not get accurate results,this is
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Seasons Are Changing!

There is a deviation in temperature  and season within different parts of the world as some times there is so cold temperature at Europe and some times there is so hot in Asian countries.Environmental Scientists are keenly indulge in finding the