The Derry area is located in Westmoreland County, Pennsylvania. Derry is the home for 18,312 people. According to the Pennsylvania Department of Environmental Protection, the Derry area had radon tests conducted. The average radon level of a Derry home is 5.3 pCi/L and the max radon level of a home was 51.2 pCi/L. The radon levels in the Derry area are, on average, 1.3 pCi/L above the EPA's recommended action level. Home Radon Pros provides radon testing and radon removal services to families that live in the Derry area. Call today to protect your family from the dangers of radon.