Geiger Readings for May 31, 2015

Ambient office = 107 nanosieverts per hour
 
Ambient outside = 116  nanosieverts per hour
 
Soil exposed to rain water = 90 nanosieverts per hour
 
Iceberg lettuce from Central Market = 69  nanosieverts per hour
 
Tap water = 51 nanosieverts per hour
 
Filtered water = 44 nanosieverts per hour