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1.The indicator bacterium should be suitable for the analysis of all types of water, tap, river, ground, recreational estuary sea and waste water
2.It should be present whenever enteric pathogens are present and absent in uncontaminated sample
3.It should survive longer than the hardiest enteric pathogens
4.It should be harmless to humans /the indicator organism should be non-pathogenic
5.It should not reproduce in the contaminated water, thereby producing an inflated values
6.The testing method should be easy to perform
7.Its level in contaminated water should have some direct relationship to the degree of fecal pollution
8.Should be present in greater numbers than the pathogens
9.Should be one of the intestinal micro flora of warm blooded animals
10. The assay procedure should have high sensitivity and detect low levels of the indicator. (other bacterial should not give positive results)
Kavungya answered the question on March 13, 2019 at 06:28
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