Table 4.

Range of limits of quantification (<LOQ) and frequency of reported LOQ.

PFAS	Limit of Quantification Range (ng/L)
	Primary Sites	Secondary Sites	Background Sites
PFPrA	5.1 – 25 (48%)	NR	NR
PFBA	0.1 – 100 (35%)	0.1 – 0.20 (55%)	0.004 – 5 (11%)
PFPeA	0.2 – 50.8 (29%)	0.03 – 40 (52%)	0.0211 – 5 (9%)
PFHxA	0.5 – 50(15%)	0.93 – 10 (40%)	0.02 – 5 (7%)
PFHpA	1 – 50(18%)	0.053 – 40 (42%)	0.02 – 5 (21%)
PFOA	0.5 – 97.6 (13%)	0.05 – 5 (40%)	0.03 – 5 (5%)
PFNA	0.05 – 100 (35%)	0.02 – 40 (57%)	0.027 – 7 (14%)
PFDA	0.1 – 100 (56%)	0.035 – 40 (59%)	0.017 – 5 (54%)
PFUnDA	1 – 50 (51%)	0.03 – 40 (71%)	0.04 – 0.5 (66%)
PFDoDA	0.3 – 50 (67%)	0.03 – 40 (72%)	0.025 – 0.3 (55%)
PFTriDA	0.05 – 50 (78%)	0.05 – 100 (82%)	0.04 – 0.3 (73%)
PFTeDA	0.3 – 120 (75%)	0.041 – 100 (88%)	0.015 – 0.25 (80%)
PFHxDA	0.5 – 1 (100%)	0.05 – 0.2 (99%)	0.006 – 0.5 (91%)
PFOcDA	0.4 – 0.5 (100%)	0.2 – 0.25 (99%)	0.02 – 0.5 (86%)
PFPrS	0.009 – 50 (65%)	NR	NR
PFBS	2.3 – 100 (21%)	0.097 – 40 (47%)	0.02 – 25 (14%)
PFPeS	5 – 30 (19%)	0.1 (9%)	NR
PFHxS	0.1 – 0.5 (9%)	0.15 – 10 (51%)	0.017 – 5 (25%)
PFHpS	2 – 50 (16%)	0.025 – 40 (24%)	0.004 – 0.25 (60%)
PFOS	0.05 – 100 (11%)	0.21 – 40 (55%)	0.01 – 5 (6%)
PFOSA	0.7 – 50 (78%)	0.008 – 0.031 (17%)	0.004 – 11.5 (48%)
PFNS	2 – 20 (34%)	NR	NR
PFDS	1.4 – 50 (64%)	0.25 – 40 (77%)	0.007 – 11.5 (70%)
4:2 FTS	6 – 50 (42%)	NR	NA
6:2 FTS	0.5 – 100 (30%)	0.06 – 2.6 (66%)	0.06 – 7 (NA)
8:2 FTS	0.5 – 100 (52%)	NR	NR
GenX	3.1 (0%)	1.3 (47%)	NA

NR = Not reported

NA = Not available