Ambient office = 103 nanosieverts per hour

 

Ambient outside = 89 nanosieverts per hour

 

Soil exposed to rain water =83 nanosieverts per hour

 

Red seedless grapes from Top Foods =77 nanosieverts per hour

 

Tap water = 67 nanosieverts per hour

 

Filtered water = 53 nanosieverts per hour