fluorochemicals in New Hanover drinking water Nadine Kotlarz, PhD - PowerPoint PPT Presentation

Update on GenX and other fluorochemicals in New Hanover drinking water Nadine Kotlarz, PhD nkotlar@ncsu.edu Wilmington, April 17, 2018 Preliminary Information Subject to Revision. Not for Citation or Distribution. 1

Preliminary Information Subject to Revision. Not for Citation or Distribution. Why collect drinking water samples? 1. Get updated information about GenX 2. Analyze for other fluorochemicals 2

Preliminary Information Subject to Revision. Not for Citation or Distribution. Fluorochemicals we tested for (tinyurl.com/GenXstudy) 3

Preliminary Information Subject to Revision. Not for Citation or Distribution. Fluorochemicals we tested for (tinyurl.com/GenXstudy) Fluorochemicals “Legacy” Newly identified 1. PFBA 11. GenX 2. PFPeA 12. Nafion byproduct 2 3. PFHxA 13. PFMOAA 4. PFHpA 14. PFO4DA 5. PFOA 15. PFO3OA 6. PFNA 16. PFO2HxA 7. PFDA 17. 6:2 FTS 8. PFBS 9. PFHS 10. PFOS 4

Preliminary Information Subject to Revision. Not for Citation or Distribution. Fluorochemicals we tested for (tinyurl.com/GenXstudy) Fluorochemicals “Legacy” Newly identified 1. PFBA 11. GenX 2. PFPeA 12. Nafion byproduct 2 3. PFHxA 13. PFMOAA 4. PFHpA 14. PFO4DA 5. PFOA 15. PFO3OA 6. PFNA 16. PFO2HxA 7. PFDA 17. 6:2 FTS 8. PFBS 9. PFHS 10. PFOS 5

Preliminary Information Subject to Revision. Not for Citation or Distribution. Two CFPUA water treatment plants serve New Hanover County 6

Preliminary Information Subject to Revision. Not for Citation or Distribution. Two CFPUA water treatment plants serve New Hanover County Sweeney water Richardson water treatment plant treatment plant (Cape Fear River) (groundwater) 7

Preliminary Information Subject to Revision. Not for Citation or Distribution. Water source for 198 participating households 194 households on CFPUA’s Cape Fear River water plant 8

Preliminary Information Subject to Revision. Not for Citation or Distribution. Water source for 198 participating households 194 4 households on CFPUA’s groundwater plant 9

Preliminary Information Subject to Revision. Not for Citation or Distribution. Timeline GenX health advisory 2,400 ng/L GenX in Chemours outfall level of 140 ng/L issued 290 ng/L GenX in Nafion byproducts still Chemours outfall being released in Chemours outfall 3,700 ng/L GenX in Chemours outfall Sweeney treated water: 33 ng/L GenX Chemours GenX spill July 14 Sweeney treated water: 32 ng/L GenX Sweeney treated 10 water: 98 ng/L GenX

Preliminary Information Subject to Revision. Not for Citation or Distribution. Timeline GenX health advisory 2,400 ng/L GenX in Chemours outfall level of 140 ng/L issued 290 ng/L GenX in Nafion byproducts still Chemours outfall being released in Chemours outfall 3,700 ng/L GenX in Chemours outfall Water sampling start Sweeney treated water: 33 ng/L GenX Chemours GenX spill Dec 8 July 14 Water sampling end Sweeney treated water: 32 ng/L GenX Sweeney treated 11 water: 98 ng/L GenX

Preliminary Information Subject to Revision. Not for Citation or Distribution. Timeline GenX health advisory 2,400 ng/L GenX in Chemours outfall level of 140 ng/L issued 290 ng/L GenX in Nafion byproducts still Chemours outfall being released in Chemours outfall 3,700 ng/L GenX in Chemours outfall Water sampling start Sweeney treated water: 33 ng/L GenX Chemours GenX spill Dec 8 July 14 Water sampling end Sweeney treated Sweeney treated water: 32 ng/L GenX water: 29 ng/L GenX Sweeney treated 12 water: 98 ng/L GenX

Most samples with Cape Fear River source had GenX North Carolina health value (140 parts per trillion) GenX (parts per trillion) Groundwater Treated water Cape Fear from Sweeney source River source Plant 13 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Preliminary Information Subject to Revision. Not for Citation or Distribution. 140 parts per trillion = 140 drops in an Olympic size swimming pool 14

Samples with groundwater source did not have GenX North Carolina health value (140 parts per trillion) GenX (parts per trillion) Groundwater Treated water Cape Fear from Sweeney source River source Plant 15 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Preliminary Information Subject to Revision. Not for Citation or Distribution. Similar GenX concentrations in Sweeney treated water North Carolina health value (140 parts per trillion) GenX One sample (parts shows per current trillion) exposure Groundwater Cape Fear Treated water from source River source Sweeney plant, Oct 2-Dec 5, 2017

Preliminary Information Subject to Revision. Not for Citation or Distribution. GenX in Sweeney treated water after Chemours stopped discharging GenX 800 Prior to June 2017 Average: 600 parts per trillion GenX (parts per trillion) 700 Maximum: 4,500 parts per trillion 600 500 400 300 North Carolina Health Value 200 140 parts per trillion 100 0 June 21 June 26 July 1 July 6 July 11 July 16 July 21 July 26 July 31 Aug 5 6/21 6/26 7/1 7/6 7/11 7/16 7/21 7/26 7/31 8/5 Date in 2017 Data source: CFPUA and NC DEQ

Individualized water results “Non - detect” Concentration (parts per trillion) water samples 18 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Individualized water results Average concentration (45 parts per trillion) * Health value Participant’s sample “Non - detect” Concentration (parts per trillion) water samples 19 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Fluorochemicals with health values Concentration (parts per trillion) 20 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Other “legacy” fluorochemicals Concentration (parts per trillion) 21 Preliminary Information Subject to Revision. Not for Citation or Distribution.

A pure sample of each chemical is needed to get concentration Mass spectrometer 22 Preliminary Information Subject to Revision. Not for Citation or Distribution.

A pure sample of each chemical is needed to get concentration Average mass spectrometer response 23 Preliminary Information Subject to Revision. Not for Citation or Distribution.

A pure sample of each chemical is needed to get concentration Pure chemical or “standard” Parts per trillion in water Average mass Response spectrometer response 24 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Preliminary Information Subject to Revision. Not for Citation or Distribution. Other fluorochemicals were present No pure chemicals were available Average mass spectrometer response 25

Newly identified fluorochemicals 26 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Conclusions 1. GenX found in most water samples with Cape Fear River source 2. No samples were above current public health values for GenX, PFOA or PFOS 3. Other newly identified fluorochemicals were present in water samples 27 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Blood and urine analyses are ongoing 1. Water analysis helped to characterize exposure 2. Water shows current exposure levels but blood levels may provide more information about long-term exposures 3. Fluorochemicals that were low in water may be higher in blood 28 Preliminary Information Subject to Revision. Not for Citation or Distribution.

Preliminary Information Subject to Revision. Not for Citation or Distribution. Acknowledgments Study participants National Institute of Environmental Health Sciences (NIEHS, 1R21ES029353) Mark Strynar, US EPA Andrew Lindstrom, US EPA James McCord, US EPA Zachary Hopkins, NCSU Madi Polera, Samantha Davis, Nick Iraola, Leah Becton, Shannon Schaible, Spencer Bloom, Samuel Elter, Yamile Eucinda (UNCW), Janhavi Kulkarni, Lan Cheng (NCSU) New Hanover County Health Department Community Science Advisory Panel 29