Figure 4 shows the chart of gross alpha and beta radioactivity of borehole water samples of Dutse town,
Jigawa State. The observed alpha activity of all the sampling areas was below the maximum contamination
level set by WHO of 0.5 Bq/l. The observed beta activity of all the sampling locations was above the guidelines
recommended by WHO of 1.0 Bq/l. The maximum activity reported for both alpha and beta were 0.485 and
84.677 Bq/l respectively and the minimum activity recorded was Below Detection Limit (BDL). The alpha
activity recorded in borehole water samples were lower than the activity recorded in the well water samples. The
difference might be from the absorption of radionuclides by the wall of the pipes unlike that of wells which was
fetched directly from its source.