https://phys.org/news/2018-10-uncovers-high-previously-unsuspected-pollutant.html

"We found surprisingly high levels of TDTBPP everywhere we looked," said Marta Venier, a scientist at the IU School of Public and Environmental Affairs and the first author of the study. "The fact that this potentially toxic chemical is so abundant, but was previously unknown, is another example of the ineffective management of chemicals in the United States."

Many common commercial chemicals, including TDTBPP, are not subject to regulatory scrutiny under the U.S. Toxic Substances Control Act unless they are used for new purposes, and much of the information about their commercial use is private. Therefore, it is difficult for environmental chemists to track how these pollutants enter the environment and what kind of effects they might cause once they do. Many chemicals go undetected until scientists perform a general environmental scan, like this study conducted by scientists at IU.