Geiger Counter Readings in Seattle, WA on July 30, 2012

Ambient office = .078 microsieverts per hour

Tap water = .116 micosieverts per hour

Filtered water = .079 micosieverts per hour

Celery from local produce stand = .083 micosieverts per hour

Ambient outside = .109 micosieverts per hour

Soil exposed to rain = .109 micosieverts per hour