PFAS components and ratios in each mixture corresponding to contamination detected in locations in North Carolina. Detection of these mixtures by the array is shown in Fig. 9. All mixtures contain the same total PFAS concentration, except for the Sanford mixture, which is 4.5-times more concentrated.

Area	Total [PFAS]rel	PFAS species	Ratio
Mebane	1	PFOS, PFOA, PFHxA, PFPeA	1 : 1 : 2 : 19
Raeford	1	PFHxA, PFPeA, PFHxS, PFBS, PFOS	1 : 1 :6 : 8 : 12
Ramseur	1	PFPeA	—
Sanford	4.5	PFOA, PFHxS, PFOS, PFPeA, PFHpA, PFHxA	1 : 2 : 91 : 11 : 11 : 6
Wallace	1	PFOS, PFPeA	1 : 25