Water Quality

A detailed Summary of Water Quality


The U.S.A. government mandates that all suppliers of water must test their water supply for contaminants yearly. Water companies run tests constantly checking for contaminants in the reservoir (main water supply) their water comes from. There are many types of water contaminants. Looking for an indicator organism, an organism that is only present when certain contaminants are present, checks for most water contaminants. (Evans, 2001, p. 8) Water-borne diseases are one type of contaminant that needs to be checked for. Water-borne diseases are those diseases that require large amounts of water. Coliform is an example of a water-borne indicator organism that is what is being looked for in water contamination tests. (Tortora, 2001, p. 759) Water sources are checked for contamination because the transmission of water-borne diseases is high because many people share water from the same source.


Water sample B tested positive for the presence of a contaminant when inoculated into a lactose broth. The presence of E. coli, a contaminant, was confirmed when the lactose broth was streaked onto an EMB plate and the colonies were a metallic green color. A colony from the EMB plate was then inoculated into a second lactose broth, which had the same result as the first lactose broth, which confirmed the same organism was being tested now as when the experiment began. The water source was confirmed contaminated because the sample taken from that source was found to have contamination and thus is not safe to drink. All the people who use that water source must find a new source of water. (Tortorga, 2002, p. 759-761)



Some common words found in the essay are:
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Approximate Word count = 659
Approximate Pages = 3 (250 words per page double spaced)

Category: Politics

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