EPA Radon Information
http://www.epa.gov/radon/pubs/citguide.html

Here you will find information from the environmental protection agency about the effects and causes fo radon gas.

Wisconsin Building Codes-Unoffical online version
http://legis.wisconsin.gov/rsb/code/comm/comm021.pdf

These are the building codes that are established as standards for construction in the state of Wisconsin.  This is an unoffical version of the codes, but gives a pretty good idea of what is expected from single family and duplex structures.  many of the same codes apply to multi-family residences.

WAHI-Wisconsin Association of Home Inspectors
http://www.wahigroup.com/

This is a professional organization for home inspectors working in the state of Wiscosin. This group is a large contributor to the national and state standards associated with home inspectors and their performance.

NAHI-National Association of Home Inspectors
http://www.nahi.org/

This is one of the two major national professional groups for home inspectors in the US. This group is a large contributor to the national and state standards associated with home inspectors and their performance.

ASHI-American Society of Home Inspectors
http://www.ashi.org/

This is one of the two major national professional groups for home inspectors in the US.  This group is a large contributor to the national and state standards associated with home inspectors and their performance.