Here is more detailed report on this problem in Europe [1] They seem to indicate levels many times higher are present in Europe than the EPAs suggested limited of 70 PPT. Although that limit also seems to be commonly exceeded in US. It is concerning that technical discussion over regulation is occurring while the picture of actual contamination levels is very incomplete [2]
[1] https://www.eea.europa.eu/themes/human/chemicals/emerging-ch...
[2] https://greensciencepolicy.org/wp-content/uploads/2017/12/An...