Pollution is a global problem of the various forms of pollution, water pollution is probably one of the most important because of it health hazards. Water pollution is the contamination of the water bodies such as lakes, rivers, ocean and underground water by human or natural activities that constitutes a great deal of danger to both plants, animals and man. This could be from activities such as wrongful disposal of sewage, petroleum and refinery wastes, mining wastes, radioactive substances and toxic chemicals and application of nitrates and phosphates fertilizers. The focus of this book is to determine the level of beta radioactivity in underground water in kakuri Kaduna south Area Council of Kaduna state, Nigeria.