.pld Extension - List of programs that can open .pld files In the following table, you can find a list of programs that can open files with .pld extension.This list is created by collecting extension information reported by users through the 'send report' option of FileTypesMan utility.
According to a national residential radon survey completed in 1991, the average indoor radon level in the United States is 1.3 picocuries per liter (pCi/L). The average outdoor level is about 0.4 pCi/L. Excessive radon levels have been found in all of the 50 states.
Though Pennsylvania is an area with a high potential for radon problems, elevated radon levels have been found in every state. In Michigan, nearly one in eight homes would be expected to have a radon problem, and in some counties as many as 40-45% of the homes could have problems.