Bacteriological quality of Mirik lake waters, Darjeeling district, West Bengal
DOI
Access Status
This content is available to Open Access.
To download content simply use the links provided under the Files section.
More information about licence and terms of use for this content is available in the Rights section.
Type
Article
Date
2012-03
Journal Title
NBU Journal of Plant Sciences
Journal Editor
Sen, Arnab
Journal ISSN
Volume Title
Publisher
University of North Bengal
Statistics
Total views and downloads
Views
102Downloads
55Citation
Sharma, B. C., Rai, B., Kalikotay, S., Tamang, B., & Rai, R. (2012). Bacteriological quality of Mirik lake waters, Darjeeling district, West Bengal. NBU Journal of Plant Sciences, 6(1), 31–34. https://ir.nbu.ac.in/handle/123456789/4450
Authors
Sharma, B.C.
Rai, B.
Kalikotay, S.
Tamang, B.
Rai, R.
Advisor
Editor
Abstract
A study was conducted on Mirik Lake to assess the bacteriological quality of the lake water during the period of March 2009 through February 2010. Water samples were collected from five different sites of the lake and analysed for bacteriological study to enumerate the seasonal distribution of total bacterial count, total coliform, faecal coliform bacteria and faecal streptococci. Total heterotrophic bacterial count per 100 ml (cfu/100 ml) was found to be 0.2x106-0.3x106 in monsoon, 1.0 x 106-6.7 x106 in summer and 4.75 x 106 - 10 x 106 in winter. The range of total coliform was observed to be 1100 - 1750 / 100 ml, 1100 - 2400/ 100 ml and 1750 - 2400 /100 ml in winter, summer and monsoon seasons, respectively. Faecal coliform was recorded to be 49 - 1245 / 100 ml in winter, 1320 - 2400 /100 in summer and 780 - 2400 / 100 ml in monsoon. The range of faecal streptococci was found to be 43-125 /100 ml in winter, 87-1100/100 ml in summer and 87 - 1340 /100 ml in monsoon.
The study indicated that the lake water was polluted by faecal contaminants of human origin to the extent that water was unsafe to be used for domestic as well as recreational purposes, also the total bacterial load exceeded the standard prescribed level (WHO, 1983) and both parameters showed variation according to the sampling sites and season.
Description
Keywords
Coliforms, Faecal, Streptococci
Citation
Accession No
Call No
Book Title
Edition
Volume
ISBN No
Volume Number
6
Issue Number
1
ISSN No
0974-6927
eISSN No
Pages
Pages
31 - 34