Are EPAs efforts showing any results?
Although more time will be needed to assess the full impact of these efforts, a possible indication of progress can be found in a U.S. Centers for Disease Control and Prevention (CDC) study, published in 2007, which reported significant reductions in human blood concentrations of PFOS and PFOA from 1999-2000 compared to the most recent data in 2003-2004. The geometric mean for PFOA in human blood was reduced by 25 percent over this period and PFOS was reduced by 32 percent. The report concluded that these reductions were most likely related to changes brought about by EPA efforts on these chemicals and other related efforts by government and industry.
