Ambient office  =  111 nanosieverts per hour

Ambient outside = 93 nanosieverts per hour

Soil exposed to rain water = 91 nanosieverts per hour

Red potato from Central Market = 148 nanosieverts per hour

Tap water = 119 nanosieverts per hour

Filtered water = 103 nanosieverts per hour

Dover sole – Caught in USA = 121 nanosieverts per hour