Radon is a highly radioactive gas and a waste product of nuclear reactors. Radon is also carcinogenic for this reason and can be linked to the incidence of lung cancer in non smoking individuals who often spend time indoors. Assessment and Mitigation of Indoor Radon Problem is a case book for professionals who are interested in modeling the distribution of Radon gas in a real environment. The book is a collection of results taken from a survey of locations in the US state of Ohio. The data in this case book is based is based on the homes and mitigation databases of the Ohio Radon Information System (ORIS), maintained by the Air Pollution Research Group (APRG) at The University of Toledo in Toledo.This case book will be of interest to software engineers and environmental health workers seeking to build a geographic information system for tracking radioactive waste that can contaminate residential areas, particularly household indoors.