MICROBIOLOGICAL ANALYSIS OF WATER

The microbiological analysis of water aims at looking for micro-organisms that are normally found in human and animal intestine in high concentration. They are eliminated with excrements and are carried into domestic drain pipes that collect waste water used by men for all their necessities. The sewage is then treated in depuration plants.
Unfortunately not always waste water is depurated, some illegal drains flow directly into rivers and seas without going through water depuration process.
That's the reason why it is important to carry out a microbiological analysis.
If we find high concentrations of micro-organisms called coliform , it means sure fecal pollution and that water has not been properly depurated. It is not drinkable and it is not good for recreation use, neither for washing vegetables. Faecal coliforms are indicators of a recent contamination, whereas total coliforms are indicators of a less recent pollution, because the fecal streptococcus is not resistant in water for a long time.

Faecal coliforms

These bacteria are indicators of fecal pollution because these bacteria normally live in human and animal intestine. They are dangerous for health because they may produce pathogen micro-organisms bringing diseases such as salmonellas, dysentery, hepatitis, typhoid and vibrio cholera.