Ambient office = 83 nanosieverts per hour

 

Ambient outside = 90 nanosieverts per hour

 

Soil exposed to rain water = 100 nanosieverts per hour

 

Redleaf lettuce from Top Foods = 113 nanosieverts per hour

 

Tap water = 133 nanosieverts per hour

 

Filtered water = 120 nanosieverts per hour