Geiger Counter Readings in Seattle, WA on August 5, 2012

Ambient office = .091 microsieverts per hour

Tap water = .113 micosieverts per hour

Filtered water = .089 micosieverts per hour

White onion from local produce stand = .131 micosieverts per hour

Ambient outside = .098 micosieverts per hour

Soil exposed to rain = .086 micosieverts per hour