Abstract
This study was aimed to estimate the microbiological status of river Bhavani which is the major life line of the surrounding area. The river water is used mainly for drinking, washing and swimming purposes. Water samples were collected from five sites (Pilloor, Effluent, Sweage I & II, Bhavanisagar reservoir) and theresults obtained were compared with WHO and EP standards for drinking and recreational water. In the present investigation station III and IV (which is Sweage I & II respective points) showed more numbers of microbes were present which cause the deadly diseases to human being as well as in aquatic, terrestrialorganism due the sewage discharges from the nearby towns. But in the case of lower stream (Bhavanisagar reservoir) that the counts of microorganism present in the reservoir was slightly reduced. The major groups of microorganisms were isolated and identified are E. coli, P. aerugionosa, E. aerogenes, S. aureus, Salmonella sp, Bacillus sp, Proteus sp, Klebsiella sp, Flavo bacterium, Acinetobacter sp. The results are alarming and show that alternative measures to reduce the pollution should be taken in favor of society
Highlights
Fresh water resources are becoming deteriorated day-by-day at a very faster rate
Water samples were collected from five sites (Pilloor, Effluent, Sweage I & II, Bhavanisagar reservoir) and the results obtained were compared with WHO and EP standards for drinking and recreational water
The study area divided in a broad sense in three parts namely upper stream, middle stream and downstream and water samples were collected aseptically and transported to the laboratory for analysis the rapid survey was carried our between 2011-12 session to estimate the microbial load and possible impacts of microorganisms on the people receiving end
Summary
Fresh water resources are becoming deteriorated day-by-day at a very faster rate. Water is a resource that has many uses, including recreation, transportation, and hydroelectric power, domestic, industrial and commercial uses. Water is available in the universe in huge quantity in the order of 1400 x 106 km and only 3% of the waters in the universe as freshwater. Only about 5% of them or 0.15% of the total world waters are readily available for beneficial use. The total water resource available in India is 1850 km, which is roughly 4% of the world's fresh water resources. Rivers are vital and vulnerable freshwater systems that are critical for the sustenance of all life. Rivers are waterways of strategic importance across the world, providing main water resources for domestic, industrial, and agricultural purposes (Fathi, 2006). Rivers play a major role in assimilation or carrying off of municipal and industrial wastewater and runoff from agricultural land, the former constitutes the constant polluting source whereas the later is a seasonal phenomenon
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