Ambient office = 72 nanosieverts per hour

 

Ambient outside = 94 nanosieverts per hour

 

Soil exposed to rain water = 82 nanosieverts per hour

 

Redleaf lettuce from Top Foods = 97 nanosieverts per hour

 

Tap water = 122 nanosieverts per hour

 

Filtered water = 109 nanosieverts per hour