Mitigation and Remedy of Groundwater Arsenic Menace in India

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Mitigation and Remedy of Groundwater Arsenic Menace in India : A Vision DocumentTable 2.2: Summary of groundwater arsenic contamination status in West Bengal, India(Chakraborti et al 2008a)ParametersWest BengalArea in sq. km. 88,750Population in million 80.2Total number of districts (no. of district surveyed) 19 (19)Total number of water samples analyzed 1,40,150% of samples having arsenic > 10 µg L -1 48.1% of samples having arsenic > 50 µg L -1 23.8Maximum arsenic concentration so far we analyzed (µg/L ) 3700No. of severely arsenic affected districts * 9No. of mildly arsenic affected districts* 5No. of arsenic safe districts* 5Total population of severely arsenic affected 9 districts in million 50.4Total area of severely arsenic affected 9 districts in sq. km. 38,861Total number of blocks/ police station 341Total number of blocks/ police station surveyed 241Number of blocks / police station having arsenic >50µgL -1 111Number of blocks / police station having arsenic >10µgL -1 148Total number of village 37910Total number of village surveyed 7823Number of villages/paras having arsenic above 50 µgL -1 3417People drinking arsenic contaminated water >10 µgL -1 (in million) 9.5People drinking arsenic contaminated water >50 µgL -1 (in million) 4.6Population potentially at risk from arsenic contamination > 10 µg L -1 ( inmillion )26No. of districts surveyed for arsenic patients 9No. of districts where arsenic patients found 7Villages surveyed for arsenic patients 602Number of villages where we have identified people with arsenical skin 488lesionsNIH & CGWB 33
Arsenic Menace in India- An AppraisalTable 2.3: Block wise distribution of arsenic concentration in West Bengal (Chakraborti et.al. 2008b)Districts Area in Population Total no.km 2 of blocksNo. ofblockssurveyedNo. ofblockswith As>10 µg/LNo. ofblockswith As>50 µg/LNo. ofsamplesanalyzedDistribution of total samples in different arsenic concentration(µg/L) ranges≤3 4 -10 11-50 51-100 101-200Highly affectedNorth-24-PGS 4094 8934286 22 22 22 21 54368 22221 3129 13001 6403 5531 2249 1308 477 49 2830South-24-PGS 9960 6906689 29 17 12 11 8333 4407 427 1141 743 741 327 305 212 30 3700Murshidabad 5324 5866569 26 26 25 24 29668 11471 2244 8042 3267 2366 941 884 382 71 3003Nadia 3927 4604827 17 17 17 17 28794 11431 2613 9810 2265 1520 630 360 152 13 3200Maldah 3733 3290468 15 14 13 9 4449 1754 373 810 488 559 183 163 97 22 1904Haora 1467 4273099 14 12 12 7 1471 889 226 192 87 41 22 12 1 1 1333Hugli 3147 5041976 18 17 16 11 2212 1469 346 251 77 52 14 2 1 600Kolkata 185 4572876 a 141 b 100 b 65 b 30 b 3626 2224 855 345 85 75 27 10 5 800Bardhaman 7024 6895514 31 24 12 7 2634 2091 79 244 86 89 27 11 6 1 2230Sub Total 38861 50386304 172 149 129 107 135555 57957 10292 33836 13501 10974 4420 3055 1333 187Mildly affectedKoch Bihar 3387 2479155 12 5 4 1 474 403 57 13 1 54Darjiling 3149 1609172 12 4 3 0 562 502 50 10 19Dinajpur (N) 3140 2441794 9 7 6 2 990 817 57 112 4 68Dinajpur (S) 2219 1503178 8 6 2 1 452 398 47 6 1 51Jalpaiguri 6227 3401173 13 7 4 0 445 355 74 16 27Sub Total 18122 11434472 54 29 19 4 2923 2475 285 157 6UnaffectedBankura 6882 3192695 22 17 0 0 279 279
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Mitigation and Remedy of Groundwater Arsenic Menace in India

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