This book is designed to provide a concise summary of low cost arsenic removal techniques, that students and others can use by itself or can supplement with readings in other texts. This book is written primarily for those who have some knowledge on Physics, Chemistry, Toxicology and Human Physiology. In writing this book, the author has not been able to complete and concise without also being dogmatic. I believe, however, that the chapters are prepared depending on recent information's and evidences available in different scientific research and review papers. Further discussions of particular subjects and information on subjects not considered in detail can be found in the references listed at the end of each chapter. I am greatly indebted to the many individuals who helped with preparation of this book. Those who are especially helpful in the preparation of this book respected Dr. Deepayan Choudhury ( Associate Professor, Department of Human Physiology, Tripura University), respected and quite Mr. Uday Shankar Singha (Learned Advocate of Hon'ble High Court, Bar Council of Tripura) and my respected heart touching parents for their constant encouragement.