Mitigation and Remedy of Groundwater Arsenic Menace in India

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Mitigation and Remedy of Groundwater Arsenic Menace in India : A Vision DocumentIt must, however, be noted that though the above system has been successful in monitoringpublic sources, the big question remains on the monitoring of water quality of the privatesources. In Bangladesh, a community based approach, using field kits, has created a very largedatabase covering both public and private sources. However, the precision and dependability ofthe same is always open to question. The challenge is to produce field test kits, which are robust,reliable, cheap and simple enough to be used by relatively unskilled users in the villages of Indiaand Bangladesh. It is also imperative to say tat these field kits and supplies should be readilyavailable for the rural markets. Misclassification of arsenic contaminated drinking water sourcesis a real risk, considering the large number of wells, having arsenic concentrations close to theexisting national drinking water standard. However, giving the private well owners fullinformation, about the test result of his well, will alert them to a considerable degree, regardingthe contamination of their water supply. This will also enable them to make their own decisionsregarding the use of the tube wells, owned by them.7.2.3 Provision of Arsenic Safe Water to the Community: The Key Challenge ofSustainabilityIn West Bengal, the Master Plan envisages supply of arsenic safe water, to all theaffected habitations, through a system of piped water supply, which would be fed from treatmentplants after appropriate treatments. 40% of the villages would be supplied from mega watertreatment plants, drawing water from large perennial rivers like the Ganga. They would supplywater through kilometers of water distribution system after appropriate treatment forbacteriological purification. 60% of the villages would be served by mini-piped water supplynetwork, which would be fed from large diameter tube wells after removing arsenic by usingappropriate technology. This is the most ambitious long term mitigatory programme undertakenby any State Govt. for the arsenic affected rural community. The implementation of the masterplan is expected to be completed by 2011. But the progress of work indicates delay in projectexecution. The more vital question that remains to be answered is that, whether such a capitalintensive approach could be sustainable in the long run. Effected operation and maintenance ofthe system, through people's participation in cost sharing and maintenance, could go a long wayin ensuring sustainability. The success of West Bengal experience could set a model for nationwide replication. However, to make a community based scheme sustainable, the Govt. effortneeds to be supplemented. These efforts can be community based approaches through theimplementation of decentralized small scale community maintained rural water supply projects,based on traditional surface water sources, that are largely supported by rain water harvesting.There are millions of traditional surface water sources like ponds and dighis in states, like WestBengal, Bihar, UP, Jharkhand, Chhattisgarh, Assam etc, which could be rejuvenated, conservedand utilized.NIH & CGWB 129
Work Ahead: Critical Concerns and Key Challenges7.3 Existing Knowledge Gaps7.3.1 Health Impact: Scientific Health Risk Assessment and RationalEstimation of Disease BurdenThough near about 30 million people are living in the hydrogeologically risk zones (79affected rural blocks and 12 urban communities) in West Bengal and substantial population inJharkhand, Bihar, Chhattisgarh, Uttar Pradesh and Assam, the exact number of people, drinkingarsenic contaminated water and suffering from Arsenicosis, is yet to be established scientificallyand epidemiologically. Considerable confusion and contradiction persists in this matter. While theofficial statistics of the Dept. of Health, Govt. of West Bengal, reports Arsenic related diseaseburden to be
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ACKNOWLEDGEMENTThe Government of In
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nearly 33 villages in 4 districts i
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(iii) Whether ex-situ removal techn
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6.4 Experiences during Arsenic Remo
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List of FiguresFigure no. Figure ca
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List of TablesTable no. Table Capti
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Mitigation and Remedy of Groundwate
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Mitigation and Remedy of Groundwater Arsenic Menace in India

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