Table 1.

Distribution of concentrations (ng/L) of the 12 measured PFAS congeners in 152 samples of drinking water taken during July and August 2013, before the full implementation of granular activated carbon filters.

Congener	Min	25th percentile	Median	75th percentile	95th percentile	Max	% samples $\ge \mathrm{L}\mathrm{O}\mathrm{Q}$
PFBA	$<10.0$	86.0	123.5	173.3	359.4	625.0	88.8%
PFPeA	$<10.0$	45.0	70.0	100.0	210.6	370.0	90.1%
PFHxA	$<10.0$	39.0	52.0	79.5	185.8	330.0	89.5%
PFHpA	$<10.0$	$<10.0$	14.0	23.0	56.0	151.0	67.1%
PFOA	$<10.0$	176.0	319.5	546.2	1,123.2	1,475.0	89.5%
PFNA	$<10.0$	$<10.0$	$<10.0$	$<10.0$	$<10.0$	76.0	0.7%
PFDeA	$<10.0$	$<10.0$	$<10.0$	$<10.0$	$<10.0$	81.0	0.7%
PFUnA	$<10.0$	$<10.0$	$<10.0$	$<10.0$	$<10.0$	95.0	1.3%
PFDoA	$<10.0$	$<10.0$	$<10.0$	$<10.0$	$<10.0$	10.0	0.0%
PFBS	$<10.0$	66.5	91.5	183.2	382.1	765.0	89.5%
PFHxS	$<10.0$	$<10.0$	$<10.0$	13.3	26.0	66.0	40.1%
PFOS	$<10.0$	11.0	18.0	29.3	66.5	117.0	77.6%

Note: The LOQ is set at $\mathrm{10}\mathrm{.0\hspace{0.17em}}\text{ng}/\mathrm{L}$. LOQ, limit of quantification; Max, maximum; Min, minimum; PFBA, perfluorobutanoic acid; PFBS, perfluorobutanesulfonic acid; PFDeA, perfluorodecanoic acid; PFDoA, perfluorododecanoic acid; PFHpA, perfluoroheptanoic acid; PFHxA, perfluorohexanoic acid; PFHxS, perfluorohexanesulfonic acid; PFNA, perfluorononanoic acid; PFOA, perfluorooctanoic acid; PFOS, perfluorooctanesulfonic acid; PFPeA, perfluoropentanoic acid; PFUnA, perfluoroundecanoic acid.