The State of Iowa is a state in the midwestern region of the United States of America.
Iowa has the highest average radon concentrations in the nation due to significant glaciation that ground
the granitic rocks from the Canadian Shield and deposited it as soils making up the rich Iowa farmland.
The state of Iowa has many attractions. The Herbert Hoover National Historic Site and Herbert Hoover
Presidential Library and Museum are located in West Branch.Iowa is the headquarters for seven of the
top 1,000 companies for revenue.