title: Arsenic groundwater contamination in Middle Ganga Plain, Bihar, India: a future danger?
abstract: The pandemic of arsenic poisoning due to contaminated groundwater in West Bengal, India, and all of Bangladesh has been thought to be limited to the Ganges Delta (the Lower Ganga Plain), despite early survey reports of arsenic contamination in groundwater in the Union Territory of Chandigarh and its surroundings in the northwestern Upper Ganga Plain and recent findings in the Terai area of Nepal. Anecdotal reports of arsenical skin lesions in villagers led us to evaluate arsenic exposure and sequelae in the Semria Ojha Patti village in the Middle Ganga Plain, Bihar, where tube wells replaced dug wells about 20 years ago. Analyses of the arsenic content of 206 tube wells (95% of the total) showed that 56.8% exceeded arsenic concentrations of 50 micro g/L, with 19.9% > 300 micro g/L, the concentration predicting overt arsenical skin lesions. On medical examination of a self-selected sample of 550 (390 adults and 160 children), 13% of the adults and 6.3% of the children had typical skin lesions, an unusually high involvement for children, except in extreme exposures combined with malnutrition. The urine, hair, and nail concentrations of arsenic correlated significantly (r = 0.72-0.77) with drinking water arsenic concentrations up to 1,654 micro g/L. On neurologic examination, arsenic-typical neuropathy was diagnosed in 63% of the adults, a prevalence previously seen only in severe, subacute exposures. We also observed an apparent increase in fetal loss and premature delivery in the women with the highest concentrations of arsenic in their drinking water. The possibility of contaminated groundwater at other sites in the Middle and Upper Ganga Plain merits investigation.
authors.affiliation: School of Environmental Studies, Jadavpur University, Kolkata, India. dcsoesju@vsnl.com
authors.forename: Dipankar
authors.initials: D
authors.lastname: Chakraborti
authors.forename: Subhash C
authors.initials: SC
authors.lastname: Mukherjee
authors.forename: Shyamapada
authors.initials: S
authors.lastname: Pati
authors.forename: Mrinal K
authors.initials: MK
authors.lastname: Sengupta
authors.forename: Mohammad M
authors.initials: MM
authors.lastname: Rahman
authors.forename: Uttam K
authors.initials: UK
authors.lastname: Chowdhury
authors.forename: Dilip
authors.initials: D
authors.lastname: Lodh
authors.forename: Chitta R
authors.initials: CR
authors.lastname: Chanda
authors.forename: Anil K
authors.initials: AK
authors.lastname: Chakraborti
authors.forename: Gautam K
authors.initials: GK
authors.lastname: Basu
mesh_terms: D000328:Adult; D001151:Arsenic / Q000032:analysis*; D020261:Arsenic Poisoning / Q000150:complications / Q000453:epidemiology*; D002648:Child; D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000209:etiology; D006306:Health Surveys; D006801:Humans; D007194:India; D008297:Male; D044342:Malnutrition; D009422:Nervous System Diseases / Q000453:epidemiology / Q000209:etiology; D007752:Obstetric Labor, Premature / Q000453:epidemiology / Q000209:etiology; D011247:Pregnancy; D012871:Skin Diseases / Q000453:epidemiology / Q000209:etiology; D012989:Soil Pollutants / Q000032:analysis*; D014018:Tissue Distribution; D014873:Water Pollutants / Q000032:analysis*; D014881:Water Supply
chemical_list: D012989:Soil Pollutants; D014873:Water Pollutants; D001151:Arsenic