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Ambient office = 114 nanosieverts per hour

 

Ambient outside = 114 nanosieverts per hour

 

Soil exposed to rain water = 99 nanosieverts per hour

 

Redleaf lettuce from Top Foods = 60 nanosieverts per hour

 

Tap water = 124 nanosieverts per hour

 

Filtered water = 106 nanosieverts per hour