Geiger Readings for Feb 28, 2015

Ambient office = 132 nanosieverts per hour
 
Ambient outside = 96 nanosieverts per hour
 
Soil exposed to rain water = 84 nanosieverts per hour
 
Iceber lettuce from Central Market = 102 nanosieverts per hour
 
Tap water = 101 nanosieverts per hour
 
Filtered water = 86 nanosieverts per hour