Spatial Variability of Arsenic in 6000 Tube Wells in a 25 km 2 Area of Bangladesh

Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA e-mail: [email protected], Phone: (845) 365 8644, Fax: (845) 365 8154. Queens College, City University of New York, Flushing, New York 11367, USA Idaho National Environmental and Engineering Laboratory, Idaho Falls, ID 83404, USA Barnard College, New York, New York 10027, USA Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA Statistics Department, Columbia University, New York 10027, USA Mailman School of Public Health, Columbia University, New York 10032, USA National Institute of Preventive and Social Medicine, Dhaka, Bangladesh. Geology Department, Dhaka University, Dhaka, Bangladesh.