From: Radon level in a Nigerian University Campus
Office location
Permissible level N (%)
Risky level N (%)
Critical level N (%)
Total
Basement
12 (85.7)
1 (7.1)
14
Ground floor
27 (96.4)
1 (3.5)
0 (0.0)
28
First floor
20 (100)
20