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First Results of Independent Sampling for GenX

CFPUA Receives First Results of Independent Sampling for GenX

Wilmington, NC—July 11, 2017: On June 26, 2017, Cape Fear Public Utility Authority began sampling raw and finished water at Sweeney Water Treatment Plant three days per week to test for current levels of the compound GenX.

 

CFPUA received the first set of results this afternoon from Eurofins, a laboratory the utility has used for various testing services in the past. The samples, taken June 26 - July 5, indicate levels of GenX are below the current NCDHHS Derived No Effect Level of 70,909 ppt. Based upon discussions with DEQ and DHHS on Monday, DEQ anticipates having its first two weeks of sampling available for release to the public later this week and DHHS anticipates providing an updated health advisory for release to the public later this week or possibly early next week.

As referenced in the chart below, Dr. Knappe’s study found GenX at levels of 631 parts per trillion (ppt) in the raw river water and at approximately 470 ppt in the finished water at Sweeney Water Treatment Plant. On June 26, 2017, five days after Chemours Co. stopped discharging the compound into the Cape Fear River, those numbers dropped to 149 ppt and 156 ppt, respectively. Just one week later, on July 3, 2017, numbers in the finished water had dropped to 55.4 ppt.

It is important to note that water takes around 15 hours to go through the treatment process at the plant—which means finished water samples can often be older than the raw water samples.  This is why levels of GenX can be higher in finished water samples than in raw water samples.

The initial data show that current levels of GenX in the Cape Fear River are below what has been found in the past. CFPUA will continue three-day-a-week testing until levels of GenX remain consistently low, and will continue to update the public as new results come in. It is important these initial results be reviewed in the proper context with future test results collected by CFPUA, as well as results by NCDEQ so well-informed conclusions can be reached.  We will continue to release testing data as it becomes available.

genx results

All information above was provided by the Cape Fear Public Utility Authority.