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Ambient office = 120 nanosieverts per hour

 

Ambient outside = 83 nanosieverts per hour

 

Soil exposed to rain water = 90 nanosieverts per hour

 

Romain lettuce from Top Foods = 86 nanosieverts per hour

 

Tap water = 67 nanosieverts per hour

 

Filtered water = 54 nanosieverts per hour