Pennsylvania Radon Study map
![A map of Pennsylvania indicating radon concentrations of water samples collected during a multi-year groundwater radon study. Ma](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Screen%20Shot%202017-05-11%20at%209.34.43%20AM.png?itok=QD2d6bav)
Detailed Description
A map of Pennsylvania indicating radon concentrations of water samples collected during a multi-year groundwater radon study. Map by USGS.
Sources/Usage
Public Domain.
A map of Pennsylvania indicating radon concentrations of water samples collected during a multi-year groundwater radon study. Map by USGS.
Public Domain.