Geiger Counter Readings in Seattle, WA on August 3, 2012

Ambient office = .077 microsieverts per hour

Tap water = .113 micosieverts per hour

Filtered water = .091 micosieverts per hour

Iceberg lettuce from local produce stand = .119 micosieverts per hour

Ambient outside = .077 micosieverts per hour

Soil exposed to rain = .089 micosieverts per hour