Union Water Resources, River Development and Ganga Rejuvenation Minister Sushri Uma Bharti has said that she will personally visit Arsenic affected districts of West Bengal, Assam, Bihar and UP to assess the reason for it and to find out suitable ways to tackle this problem. Inaugurating an International Conference on Natural Treatment System for safe and Sustainable Water Supply in India: results from Saaf Pani here today, she said 86 district of the country are worst affected by arsenic and another 282 district by fluoride.