7. Are there public drinking water standards concerning PFAS?

On October 2, 2020, MassDEP published final regulations establishing a drinking water standard, or a Maximum Contaminant Level (MCL), for the sum of six per- and polyfluoroalkyl substances (PFAS). The MCL is 20 parts per trillion (ppt) for what the regulations call PFAS6, or the sum of six PFAS compounds: perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), perfluoroheptanoic acid (PFHpA), and perfluorodecanoic acid (PFDA).  

Additional MassDEP regulations for testing of PFAS in the environment are likely in the future as scientific studies are conducted and the understanding of these chemicals increases.  The Town of Nantucket has been and will perform all testing as required by MassDEP.  The Town may also perform testing as recommended by our professional and licensed consultants to address specific situations.  

The Town of Nantucket, Nantucket Memorial Airport and Wannacomet Water Company along with MassDEP are working together to coordinate PFAS related activities.   

Show All Answers

1. 7. Are there public drinking water standards concerning PFAS?
2. 8. Does MassDEP have a program to support private (domestic) well testing?
3. 9. Does the aquifer that the Island gets groundwater from have PFAS in it?
4. 10. Can I hook up to public water? If Yes, how?
5. 11. Are septic systems or private wastewater treatment within a Zone II aquifer wellhead protection area regulated for PFAS? If so, how?
6. 12. Who is available to perform PFAS Sampling & Testing?
7. 13. Can PFAS drinking water or soil standards be applied to leachate or co-compost?
8. 14. Are private (domestic) wells located below (downgradient of) the landfill impacted by PFAS?
9. 15. Is there a plan to collect PFAS samples from the Wastewater Treatment Facility (WWTF) and landfill site?
10. 16. Did Waste Options perform PFAS testing at the landfill in the summer of 2019?
11. 17. Even though 2019 PFAS testing was done with an imperfect method at the time (EPA 537), were the results found concerning?
12. 18. Why did it take a year for PFAS testing to be discussed by BoH and for action to be taken?
13. 19. Is there a plan to collect PFAS samples from the Wastewater Treatment Facility (WWTF) and landfill site?