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Ambient office = 113 nanosieverts per hour

 

Ambient outside = 99 nanosieverts per hour

 

Soil exposed to rain water = 103 nanosieverts per hour

 

Banana from Costco = 77 nanosieverts per hour

 

Tap water = 113 nanosieverts per hour

 

Filtered water = 105 nanosieverts per hour