The microbiological quality of the drinking water becomes much worse at the end of the village having 110 - TNTC fecal coliform in 100 ml water.
In all the villages except Bakirabad the fecal coliform contamination level increased from 30 - 600 cfu as the water becomes in the access of the communities and in the mid it was from 42 - 780 cfu and at the end of the village the contamination level was from 38 cfu to TNTC.
The inhabitants of Chundapa, Skamthang and Hashipee consume water from nallahs and the level of fecal coliform contamination was from 28 - 500 cfu in 100 ml water as it enters into delivery system the contamination increased from 30 -1350 cfu and in the end of the village contamination become very worst having TNTC colonies of fecal coliform in 100 ml drinking water.
Sinakir has zero colonies of fecal coliform in the eye of spring in 100 ml water as this water enters into the delivery system the contamination level abruptly become too much high to TNTC and it was same in the mid and end of the village.
This contamination gradually increased from 28-286 cfu in the delivery system, 34 - 300 cfu in the mid and at the end it is 50 to TNTC colonies in 100 ml drinking water.
As this safe drinking water com in contact of inhabitants except one village Bakirabad all become contaminated by fecal coliform and in the mid of distribution system the fecal coliform contamination level increased from 2 cfu - TNTC.