Ambient office = 72 nanosieverts per hour

 

Ambient outside = 141 nanosieverts per hour

 

Soil exposed to rain water = 141 nanosieverts per hour

 

Romain lettuce from Top Foods = 67 nanosieverts per hour

 

Tap water = 64 nanosieverts per hour

 

Filtered water = 53 nanosieverts per hour