Organochlorine residuals in groundwater of Pondicherry region

Nineteen representative water samples were collected from surface and ground water sources, covering urban, rural area, shallow and deep aquifers in Pondicherry region. The samples were analysed for various pesticide residues such as HCH, Aldrin and DDT. Both surface and ground water sources found t...

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Bibliographic Details
Published inJournal of environmental science & engineering Vol. 49; no. 1; p. 7
Main Authors Sivasankaran, M A, Reddy, S Sivamurthy, Govindaradjane, S, Ramesh, R
Format Journal Article
LanguageEnglish
Published India 01.01.2007
Subjects
Environmental Monitoring
Hydrocarbons, Chlorinated - analysis
India
Insecticides - analysis
Pesticide Residues - analysis
Water Pollutants, Chemical - analysis
Water Supply - analysis
India
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Summary:Nineteen representative water samples were collected from surface and ground water sources, covering urban, rural area, shallow and deep aquifers in Pondicherry region. The samples were analysed for various pesticide residues such as HCH, Aldrin and DDT. Both surface and ground water sources found to exhibit the residuals of various pesticides. The residual levels oforganochlorine pesticides were found to be three to four times more in ground water sources of agricultural areas than in urban areas, indicating the impact of usage of pesticides for agriculture. It is evident that total residuals of organochlorine pesticides are more in tanks followed by shallow wells and deep wells. However, the residual levels of pesticides were found well below the maximum acceptable level of 100 ng/L for individual pesticides for drinking purpose in the study area. Though the residual levels of pesticides in the study area were well below the acute toxicological problems, the major concern is for long term, chronic exposure from compounds that may be carcinogenic.