.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.
Cities in this county include: Philadelphia. Philadelphia County has a predicted average indoor radon screening level less than 2 pCi/L (pico curies per liter) - Low Potential. 2012 air pollution in Philadelphia County: Carbon Monoxide: 0.282 ppm (standard limit: 9 ppm). Near U.S. average. Lead: 0.0217 Âµg/m 3 (standard limit: 1.5 Âµg/m 3).