Geiger Readings for Feb 15, 2015

Ambient office = 103 nanosieverts per hour
 
Ambient outside = 137 nanosieverts per hour
 
Soil exposed to rain water = 173 nanosieverts per hour
 
New red potato from Central Market = 66 nanosieverts per hour
 
Tap water = 74 nanosieverts per hour
 
Filtered water = 66 nanosieverts per hour