Geiger Counter Readings in Seattle, WA on June 2, 2012

Ambient office = .108 microsieverts per hour

Tap water = .105 micosieverts per hour

Filtered water = .093 micosieverts per hour

Vine ripened tomatos from supermarket = .067 micosieverts per hour

Ambient outside = .095 micosieverts per hour

Soil exposed to rain = .077 micosieverts per hour