An environmental ionizing radiation survey around quarry sites in Ilorin was carried out using three Radalert Nuclear Radiation Monitors and Global Positioning System (GPS) in order to assess and provide up to date information on radiation levels in the environment. Measured mean radiation levels ranged from 1.11±0.05 to 1.72±0.03 mSv/yr with an average of 1.49±0.04 mSv/yr in the study area. The radiation levels have surpassed the standard level of 1 mSv/yr by 50%, but fall below the global average of 2.4 mSv/yr for the general public and 20 mSv/yr for occupational environment.
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