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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 paper is to determine the level of alpha radioactivity in underground water in kakuri Kaduna south Local Government Area Council of Kaduna state, Nigeria, located within latitude 10o281011 and longitude 7o251011 covering 59 km2 with population of 402,390 by the 2006 census. Five [5] hand dug wells and five [5] boreholes were sampled and analyzed using the portable single channel Gas free MPC2000b-DP detector. The result shows that the range of alpha activity varied from 0.014±0.006 Bq/L to 0.072±0.008 Bq/L with a mean value of 0.037±0.014 Bq/L. This result shows that the alpha activity was far below the recommended value set by world health organization [WHO] which is 0.5 Bq/L per year. Therefore if the water from this samples point is consumed, it poses no threat to the health of the people around the area.