Gwa Northern Water System (GU0000006) PFAS Drinking-Water Results

PWSID: GU0000006
State: Guam
System type: community water system (CWS)
Population served: 139,207
City: Mangilao
Counties: Guam
Primary source water: groundwater
UCMR 5 sampling: 2023-09-04 to 2025-12-18 · 61 entry point(s) · water types: GW
Service-area boundary: authoritative

PFOS ≥ 3 × its limit highest single result
PFOS ≥ 3 × its limit worst entry-point average

Open on the Guam map · All Guam systems · All results

These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.

Compared with EPA's 2024 values

	Highest single result	Worst entry-point average*	Limit
PFOA (ppt)	18.3	13.4	4
PFOS (ppt)	135	67.5	4
Hazard Index	8.005	4.002	1.0†

“<MRL” = every result for the compound was below its reporting limit. * Mean of all samples at each entry point with non-detects = 0 (EPA compliance convention; the Hazard Index also uses non-detects = 0); a screening comparison, not a formal running annual average. † Rescission proposed May 2026. PFOA/PFOS MCL 4 ppt (2024 NPDWR, in effect). PFHxS, PFNA, HFPO-DA (10 ppt each) and the Hazard Index (1.0) are 2024 NPDWR values; EPA proposed rescinding them on 18 May 2026 (comment period closed 20 Jul 2026).

No Guam PFAS drinking-water standard in effect or proposed as of 2026-10-17: No Guam-specific PFAS drinking-water standard; Guam EPA implementing federal NPDWR.

Sampling history

Sampled 2023-09-04 to 2025-12-18 · 61 entry point(s) · water types: GW · 163 sampling visits. PFAS in ppt (ng/L).

Date	Entry point	Event	PFOA	PFOS	HI	Other detections
2023-09-04	Well D-10 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-14 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-15 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-16 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-17A (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-18B (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-21 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-22 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-24 (GW)	SE1	<4	<4	0	none
2023-09-04	Well D-25 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-27 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-7 (GW)	SE1	n/a	n/a	n/a	none
2023-09-04	Well D-8 (GW)	SE1	<4	<4	0	none
2023-09-07	Well F-12 (GW)	SE1	n/a	n/a	n/a	none
2023-09-07	Well F-15 (GW)	SE1	<4	<4	0.49	none
2023-09-07	Well F-19 (GW)	SE1	<4	<4	0.36	none
2023-09-07	Well F-3 (GW)	SE1	n/a	n/a	n/a	none
2023-09-07	Well F-7 (GW)	SE1	<4	<4	0.835	PFHxA 4.8, PFPeA 4.5
2023-09-07	Well F-8 (GW)	SE1	n/a	n/a	n/a	none
2023-09-07	Well HGC-2 (GW)	SE1	<4	<4	0	none
2023-09-14	Well H-1 (GW)	SE1	n/a	n/a	n/a	none
2023-09-14	Well M-12 (GW)	SE1	n/a	n/a	n/a	none
2023-09-14	Well M-17A (GW)	SE1	n/a	n/a	n/a	none
2023-09-14	Well M-18 (GW)	SE1	n/a	n/a	n/a	none
2023-09-14	Well M-20A (GW)	SE1	n/a	n/a	n/a	none
2023-09-14	Well M-21 (GW)	SE1	n/a	n/a	n/a	none
2023-09-14	Well M-8 (GW)	SE1	n/a	n/a	n/a	none
2023-09-14	Well M-9 (GW)	SE1	n/a	n/a	n/a	none
2023-09-17	Well Y-1 (GW)	SE1	<4	5.3	0.64	PFHxA 4.7, PFPeA 5.4
2023-09-17	Well Y-10 (GW)	SE1	n/a	n/a	n/a	none
2023-09-17	Well Y-14 (GW)	SE1	n/a	n/a	n/a	none
2023-09-17	Well Y-15 (GW)	SE1	n/a	n/a	n/a	none
2023-09-17	Well Y-17 (GW)	SE1	<4	<4	0.6	PFHpA 3, PFPeA 3.7
2023-09-17	Well Y-20 (GW)	SE1	<4	<4	0	none
2023-09-17	Well Y-21A (GW)	SE1	n/a	n/a	n/a	none
2023-09-17	Well Y-22 (GW)	SE1	n/a	n/a	n/a	none
2023-09-17	Well Y-23 (GW)	SE1	<4	<4	0	PFBA 6.3, PFHpA 7.4, PFHxA 11.1, PFPeA 18.4
2023-09-17	Well Y-5 (GW)	SE1	<4	<4	0	none
2023-09-17	Well Y-9 (GW)	SE1	n/a	n/a	n/a	none
2023-09-20	Tumon-Maui (GW)	SE1	<4	12.7	0.962	PFHpA 3.1, PFHxA 5.9, PFPeA 7.6
2023-09-20	Well NAS-1 (GW)	SE1	18.3	135	8.005	6:2 FTS 56.3, 8:2 FTS 7.5, PFBA 6.8, PFHpA 14, PFHxA 37.1, PFPeA 16.2, PFPeS 9.9
2023-09-21	Well A-13 (GW)	SE1	<4	60.6	1.152	PFHxA 4.6, PFPeA 5.2
2023-09-21	Well A-14 (GW)	SE1	<4	9.1	0.54	none
2023-09-21	Well A-15 (GW)	SE1	<4	15.8	0.582	PFHxA 4.7, PFPeA 7.1
2023-09-21	Well A-17 (GW)	SE1	<4	11	0.33	PFPeA 3.1
2023-09-21	Well A-19 (GW)	SE1	<4	13.1	0.693	PFHpA 3.4, PFHxA 5.9, PFPeA 9.5
2023-09-21	Well A-3 (GW)	SE1	<4	<4	0	none
2023-09-21	Well A-30 (GW)	SE1	4.2	76.5	2.943	PFHxA 5.1, PFPeA 4.7, PFPeS 4.1
2023-09-21	Well A-31 (GW)	SE1	<4	8.5	0.723	PFHxA 3.6, PFPeA 5.6
2023-09-21	Well A-32 (GW)	SE1	<4	12.5	0.822	PFPeA 3.4
2023-09-21	Well A-4 (GW)	SE1	7.3	15.4	3.2	PFHxA 4.6, PFPeA 3
2023-09-21	Well A-8 (GW)	SE1	<4	16.8	0.561	none
2023-09-21	Well A-9 (GW)	SE1	16.2	14	1.217	PFBA 18.1, PFHpA 18.5, PFHxA 34.4, PFPeA 47.5
2023-09-24	Well H-1 (GW)	SE1	<4	<4	0	none
2023-09-24	Well M-12 (GW)	SE1	5	28.3	2.23	PFPeA 3.1
2023-09-24	Well M-15 (GW)	SE1	n/a	n/a	n/a	none
2023-09-28	Well F-12 (GW)	SE1	<4	<4	0.003	none
2023-09-28	Well Y-10 (GW)	SE1	<4	<4	0.003	PFHxA 3.2, PFPeA 4.8
2023-09-28	Well Y-15 (GW)	SE1	<4	4.7	0.622	6:2 FTS 148.2, PFBA 5.4, PFHpA 3.6, PFHxA 11.9, PFPeA 17.8
2023-09-28	Well Y-21A (GW)	SE1	n/a	n/a	n/a	none
2023-09-28	Well Y-22 (GW)	SE1	<4	<4	0	none
2023-10-26	Well D-10 (GW)	SE1	<4	<4	0	none
2023-10-26	Well D-15 (GW)	SE1	n/a	n/a	n/a	none
2023-10-26	Well D-7 (GW)	SE1	<4	<4	0	none
2023-10-26	Well EX-5A (GW)	SE1	<4	<4	0	PFPeA 3
2023-10-26	Well F-3 (GW)	SE1	<4	<4	0	none
2023-10-26	Well F-8 (GW)	SE1	<4	<4	0.34	none
2023-10-26	Well M-15 (GW)	SE1	<4	<4	0.482	PFHpA 4, PFHxA 5.8, PFPeA 8.6
2023-10-26	Well M-17A (GW)	SE1	<4	<4	1.2	PFHxA 3.8, PFPeA 3.7
2023-10-26	Well M-18 (GW)	SE1	<4	8.2	0.33	PFHxA 4.8, PFPeA 8.6
2023-10-26	Well M-20A (GW)	SE1	<4	<4	0.75	PFHxA 3.3, PFPeA 4
2023-10-26	Well M-21 (GW)	SE1	<4	5.4	1.38	PFHxA 4.2, PFPeA 4.8
2023-10-26	Well M-7 (GW)	SE1	<4	4.7	0.53	PFHxA 3.6, PFPeA 5.2
2023-10-26	Well M-8 (GW)	SE1	<4	<4	0.813	PFHxA 6.1, PFPeA 5.8
2023-11-02	Well Y-14 (GW)	SE1	<4	<4	0	none
2023-11-02	Well Y-9 (GW)	SE1	6.3	7.3	0.774	6:2 FTS 11, PFBA 6.7, PFHpA 8.9, PFHxA 14, PFPeA 20.7
2023-11-16	Well D-22 (GW)	SE1	<4	5.9	0.382	none
2023-11-16	Well D-25 (GW)	SE1	<4	<4	0	none
2023-11-16	Well Y-21A (GW)	SE1	<4	<4	0.452	PFHpA 3.2, PFHxA 5.5, PFPeA 8
2023-12-12	Well D-15 (GW)	SE1	<4	<4	0	PFHxA 3.3, PFPeA 5.3
2023-12-12	Well D-16 (GW)	SE1	<4	<4	0.81	PFHxA 3.5, PFPeA 5
2023-12-12	Well D-17A (GW)	SE1	<4	<4	2.572	PFHpA 4.9, PFHxA 4.8, PFPeA 4.1
2023-12-12	Well D-18B (GW)	SE1	<4	<4	0.842	PFHxA 3.1, PFPeA 4.6
2023-12-12	Well D-21 (GW)	SE1	<4	<4	0.53	none
2023-12-12	Well M-9 (GW)	SE1	<4	<4	0	none
2023-12-21	Well D-14 (GW)	SE1	<4	<4	0.31	PFHxA 3.7, PFPeA 5.2
2024-02-08	Well D-27 (GW)	SE1	<4	<4	0.4	none
2024-03-21	Well D-10 (GW)	SE2	<4	<4	0	none
2024-03-21	Well D-14 (GW)	SE2	n/a	n/a	n/a	none
2024-03-21	Well D-15 (GW)	SE2	<4	<4	0	PFHxA 3.5, PFPeA 5.1
2024-03-21	Well D-16 (GW)	SE2	<4	<4	0.772	PFHxA 3.6, PFPeA 4.8
2024-03-21	Well D-17A (GW)	SE2	<4	<4	2.482	PFHpA 4.9, PFHxA 5, PFPeA 3.7
2024-03-21	Well D-18B (GW)	SE2	<4	<4	0.832	PFHxA 3.2, PFPeA 4.4
2024-03-21	Well D-2 (GW)	SE1	n/a	n/a	n/a	none
2024-03-21	Well D-22 (GW)	SE2	<4	<4	0.38	none
2024-03-21	Well D-25 (GW)	SE2	<4	<4	0.49	none
2024-03-21	Well D-27 (GW)	SE2	<4	<4	0.43	none
2024-03-21	Well D-7 (GW)	SE2	<4	<4	0	none
2024-03-21	Well D-8 (GW)	SE2	<4	<4	0	none
2024-03-21	Well EX-5A (GW)	SE2	<4	<4	0	PFPeA 3
2024-03-23	Tumon-Maui (GW)	SE2	<4	<4	0	none
2024-03-23	Well A-13 (GW)	SE2	<4	61.3	1.193	PFHpA 3.4, PFHxA 5, PFPeA 5.1
2024-03-23	Well A-14 (GW)	SE2	<4	11.7	0.65	none
2024-03-23	Well A-15 (GW)	SE2	<4	15.9	0.642	PFHxA 4.9, PFPeA 6.7
2024-03-23	Well A-19 (GW)	SE2	<4	11.7	0.642	PFHpA 3.8, PFHxA 6.1, PFPeA 8.4
2024-03-23	Well A-3 (GW)	SE2	<4	<4	0	none
2024-03-23	Well A-30 (GW)	SE2	<4	16.2	1.307	PFBA 6.1, PFHpA 4.6, PFHxA 10, PFPeA 14.5
2024-03-23	Well A-31 (GW)	SE2	<4	10.2	0.803	PFHxA 3.8, PFPeA 5.9
2024-03-23	Well A-32 (GW)	SE2	<4	14.2	0.812	none
2024-03-23	Well A-4 (GW)	SE2	7.2	15.1	3.52	PFHxA 4.4
2024-03-23	Well A-8 (GW)	SE2	<4	13.4	0.58	none
2024-03-23	Well NAS-1 (GW)	SE2	n/a	n/a	n/a	none
2024-03-25	Well A-17 (GW)	SE2	<4	8.7	0.3	PFPeA 3.2
2024-03-26	Well A-9 (GW)	SE2	10.6	10.6	0.815	PFBA 12.1, PFHpA 12.9, PFHxA 27.1, PFPeA 33.8
2024-03-26	Well Y-1 (GW)	SE2	n/a	n/a	n/a	none
2024-03-26	Well Y-14 (GW)	SE2	<4	<4	0	none
2024-03-26	Well Y-15 (GW)	SE2	<4	<4	0.592	6:2 FTS 68.3, PFHxA 7.6, PFPeA 10.3
2024-03-26	Well Y-5 (GW)	SE2	n/a	n/a	n/a	none
2024-03-26	Well Y-9 (GW)	SE2	7	6.9	0.864	6:2 FTS 6.8, PFBA 6.5, PFHpA 10, PFHxA 14.5, PFPeA 19.8
2024-03-27	Well H-1 (GW)	SE2	<4	<4	0	none
2024-03-27	Well M-15 (GW)	SE2	<4	<4	0.512	PFHpA 4.3, PFHxA 6.3, PFPeA 8.4
2024-03-27	Well M-17A (GW)	SE2	<4	4.1	1.38	PFHxA 3.9, PFPeA 3.8
2024-03-27	Well M-18 (GW)	SE2	<4	6.3	0.43	PFHxA 4.6, PFPeA 6.7
2024-03-27	Well M-20A (GW)	SE2	<4	<4	0.72	PFHxA 4, PFPeA 4.3
2024-03-27	Well M-7 (GW)	SE2	<4	<4	0.48	PFHxA 3.1, PFPeA 4
2024-03-27	Well M-8 (GW)	SE2	<4	<4	1.254	PFHxA 7.3, PFPeA 5.1, PFPeS 5.6
2024-03-27	Well M-9 (GW)	SE2	<4	<4	1.114	PFHxA 6.8, PFPeA 4.6, PFPeS 5.3
2024-03-28	Well F-10 (GW)	SE1	<4	<4	0.37	none
2024-03-28	Well F-12 (GW)	SE2	<4	<4	0.002	none
2024-03-28	Well F-15 (GW)	SE2	<4	<4	0.53	none
2024-03-28	Well F-19 (GW)	SE2	<4	<4	0.44	none
2024-03-28	Well F-3 (GW)	SE2	n/a	n/a	n/a	none
2024-03-28	Well F-7 (GW)	SE2	<4	<4	1.15	PFHxA 5.6, PFPeA 5.1
2024-03-28	Well F-8 (GW)	SE2	<4	<4	0.4	none
2024-03-28	Well HGC-2 (GW)	SE2	<4	<4	0	PFHpA 4
2024-03-28	Well Y-17 (GW)	SE2	<4	<4	0.58	PFPeA 3.7
2024-03-28	Well Y-23 (GW)	SE2	<4	<4	0.3	PFHpA 5.8, PFHxA 9.5, PFPeA 15.6
2024-04-04	Tumon-Maui (GW)	SE2	n/a	n/a	n/a	none
2024-04-04	Well F-3 (GW)	SE2	<4	<4	0	none
2024-04-04	Well M-21 (GW)	SE2	<4	7	1.27	PFHxA 4.3, PFPeA 4.7
2024-04-04	Well NAS-1 (GW)	SE2	<4	<4	0	none
2024-04-04	Well Y-1 (GW)	SE2	<4	5.5	0.672	PFHpA 3.2, PFHxA 5.6, PFPeA 7.7
2024-04-04	Well Y-5 (GW)	SE2	<4	<4	0	none
2024-04-10	Well D-14 (GW)	SE2	<4	<4	0.61	PFHxA 3.5, PFPeA 4.2
2024-04-10	Well D-2 (GW)	SE1	<4	<4	0	PFHxA 3.2, PFPeA 4
2024-04-24	Well Y-10 (GW)	SE2	<4	<4	0.002	PFHxA 4.4, PFPeA 5.4
2024-04-24	Well Y-20 (GW)	SE2	<4	<4	0	none
2024-04-24	Well Y-21A (GW)	SE2	<4	<4	0.462	PFHpA 4, PFHxA 6.1, PFPeA 9
2024-04-24	Well Y-22 (GW)	SE2	<4	<4	0	none
2024-09-16	Well D-2 (GW)	SE2	n/a	n/a	n/a	none
2024-09-16	Well F-10 (GW)	SE2	n/a	n/a	n/a	none
2024-09-18	Well D-21 (GW)	SE2	n/a	n/a	n/a	none
2024-09-18	Well D-24 (GW)	SE2	n/a	n/a	n/a	none
2024-11-11	Well D-2 (GW)	SE2	<4	<4	0.32	none
2024-11-11	Well D-21 (GW)	SE2	<4	<4	0.46	none
2024-11-11	Well D-24 (GW)	SE2	<4	<4	0	none
2024-11-11	Well F-10 (GW)	SE2	<4	<4	0.37	none
2025-11-24	Well D-9 (GW)	SE1	<4	<4	0	PFPeA 3.4
2025-11-24	Well F-13 (GW)	SE1	<4	<4	0.772	PFPeA 3.1
2025-11-24	Well F-20 (GW)	SE1	<4	<4	0.3	none
2025-12-18	Well D-9 (GW)	SE2	<4	<4	0	PFPeA 3.5
2025-12-18	Well F-13 (GW)	SE2	<4	<4	0.722	none
2025-12-18	Well F-20 (GW)	SE2	<4	<4	0	none

“<4” = not detected at the reporting limit shown; “n/a” = not analyzed in that sample. Highlighted = at or above the 4 ppt MCL. HI computed per sample with non-detects as 0. Other detections lists every other quantified compound (lithium in µg/L).

All results by entry point

3630 results. Each column is one sampling visit (date and UCMR 5 sample event). A number is a measured concentration; “< 4” = below the minimum reporting level shown; “–” = not analyzed in that visit. PFAS in ppt (ng/L); lithium in µg/L.

Tumon-Maui facility 60998 · sample point MAUIT · groundwater

Compound	MRL	2023-09-20 SE1	2024-03-23 SE2	2024-04-04 SE2
PFBS	3 ppt	4	< 3	–
PFHpA	3 ppt	3.1	< 3	–
PFHxA	3 ppt	5.9	< 3	–
PFHxS	3 ppt	9.6	< 3	–
PFOS	4 ppt	12.7	< 4	–
PFPeA	3 ppt	7.6	< 3	–
11Cl-PF3OUdS	5 ppt	< 5	< 5	–
4:2 FTS	3 ppt	< 3	< 3	–
6:2 FTS	5 ppt	< 5	< 5	–
8:2 FTS	5 ppt	< 5	< 5	–
9Cl-PF3ONS	2 ppt	< 2	< 2	–
ADONA	3 ppt	< 3	< 3	–
HFPO-DA	5 ppt	< 5	< 5	–
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	< 20	< 20	–
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	< 5	< 5	–
PFDA	3 ppt	< 3	< 3	–
PFDoA	3 ppt	< 3	< 3	–
PFEESA	3 ppt	< 3	< 3	–
PFHpS	3 ppt	< 3	< 3	–
PFMBA	3 ppt	< 3	< 3	–
PFMPA	4 ppt	< 4	< 4	–
PFNA	4 ppt	< 4	< 4	–
PFOA	4 ppt	< 4	< 4	–
PFPeS	4 ppt	< 4	< 4	–
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	< 2	< 2	–
lithium	9 µg/L	< 9	< 9	–

Well A-13 facility 60013 · sample point 61013T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFBS	3 ppt	4.9	5.4
PFHpA	3 ppt	< 3	3.4
PFHxA	3 ppt	4.6	5
PFHxS	3 ppt	11.5	11.9
PFOS	4 ppt	60.6	61.3
PFPeA	3 ppt	5.2	5.1
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-14 facility 60014 · sample point 61014T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFHxS	3 ppt	5.4	6.5
PFOS	4 ppt	9.1	11.7
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-15 facility 60015 · sample point 61015T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFBS	3 ppt	3.1	3.6
PFHxA	3 ppt	4.7	4.9
PFHxS	3 ppt	5.8	6.4
PFOS	4 ppt	15.8	15.9
PFPeA	3 ppt	7.1	6.7
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-17 facility 60017 · sample point 61017T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-25 SE2
PFHxS	3 ppt	3.3	3
PFOS	4 ppt	11	8.7
PFPeA	3 ppt	3.1	3.2
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-19 facility 60019 · sample point 61019T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFBS	3 ppt	5	4.4
PFHpA	3 ppt	3.4	3.8
PFHxA	3 ppt	5.9	6.1
PFHxS	3 ppt	6.9	6.4
PFOS	4 ppt	13.1	11.7
PFPeA	3 ppt	9.5	8.4
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-3 facility 60003 · sample point 61003T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFHxS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-30 facility 60127 · sample point 61127T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFBA	5 ppt	< 5	6.1
PFBS	3 ppt	5.4	14.5
PFHpA	3 ppt	< 3	4.6
PFHxA	3 ppt	5.1	10
PFHxS	3 ppt	29.4	13
PFOA	4 ppt	4.2	< 4
PFOS	4 ppt	76.5	16.2
PFPeA	3 ppt	4.7	14.5
PFPeS	4 ppt	4.1	< 4
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-31 facility 60031 · sample point 61031T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFBS	3 ppt	5.7	5.6
PFHxA	3 ppt	3.6	3.8
PFHxS	3 ppt	7.2	8
PFOS	4 ppt	8.5	10.2
PFPeA	3 ppt	5.6	5.9
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-32 facility 60032 · sample point 61032T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFBS	3 ppt	4.1	3.7
PFHxS	3 ppt	8.2	8.1
PFOS	4 ppt	12.5	14.2
PFPeA	3 ppt	3.4	< 3
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-4 facility 60004 · sample point 61004T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFHxA	3 ppt	4.6	4.4
PFHxS	3 ppt	32	35.2
PFOA	4 ppt	7.3	7.2
PFOS	4 ppt	15.4	15.1
PFPeA	3 ppt	3	< 3
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-8 facility 60008 · sample point 61008T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-23 SE2
PFBS	3 ppt	3.1	< 3
PFHxS	3 ppt	5.6	5.8
PFOS	4 ppt	16.8	13.4
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well A-9 facility 60009 · sample point 61009T · groundwater

Compound	MRL	2023-09-21 SE1	2024-03-26 SE2
PFBA	5 ppt	18.1	12.1
PFBS	3 ppt	34.9	29.8
PFHpA	3 ppt	18.5	12.9
PFHxA	3 ppt	34.4	27.1
PFHxS	3 ppt	12	8
PFOA	4 ppt	16.2	10.6
PFOS	4 ppt	14	10.6
PFPeA	3 ppt	47.5	33.8
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well D-10 facility 60130 · sample point 61130T · groundwater

Compound	MRL	2023-09-04 SE1	2023-10-26 SE1	2024-03-21 SE2
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFHxS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-14 facility 60048 · sample point 61048T · groundwater

Compound	MRL	2023-09-04 SE1	2023-12-21 SE1	2024-03-21 SE2	2024-04-10 SE2
PFHxA	3 ppt	–	3.7	–	3.5
PFHxS	3 ppt	–	3.1	–	6.1
PFPeA	3 ppt	–	5.2	–	4.2
11Cl-PF3OUdS	5 ppt	–	< 5	–	< 5
4:2 FTS	3 ppt	–	< 3	–	< 3
6:2 FTS	5 ppt	–	< 5	–	< 5
8:2 FTS	5 ppt	–	< 5	–	< 5
9Cl-PF3ONS	2 ppt	–	< 2	–	< 2
ADONA	3 ppt	–	< 3	–	< 3
HFPO-DA	5 ppt	–	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	–	< 5	–
NFDHA	20 ppt	–	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	–	< 6	–
PFBA	5 ppt	–	< 5	–	< 5
PFBS	3 ppt	–	< 3	–	< 3
PFDA	3 ppt	–	< 3	–	< 3
PFDoA	3 ppt	–	< 3	–	< 3
PFEESA	3 ppt	–	< 3	–	< 3
PFHpA	3 ppt	–	< 3	–	< 3
PFHpS	3 ppt	–	< 3	–	< 3
PFMBA	3 ppt	–	< 3	–	< 3
PFMPA	4 ppt	–	< 4	–	< 4
PFNA	4 ppt	–	< 4	–	< 4
PFOA	4 ppt	–	< 4	–	< 4
PFOS	4 ppt	–	< 4	–	< 4
PFPeS	4 ppt	–	< 4	–	< 4
PFTA	8 ppt	< 8	–	< 8	–
PFTrDA	7 ppt	< 7	–	< 7	–
PFUnA	2 ppt	–	< 2	–	< 2
lithium	9 µg/L	< 9	–	< 9	–

Well D-15 facility 60049 · sample point 61049T · groundwater

Compound	MRL	2023-09-04 SE1	2023-10-26 SE1	2023-12-12 SE1	2024-03-21 SE2
PFHxA	3 ppt	–	–	3.3	3.5
PFPeA	3 ppt	–	–	5.3	5.1
11Cl-PF3OUdS	5 ppt	–	–	< 5	< 5
4:2 FTS	3 ppt	–	–	< 3	< 3
6:2 FTS	5 ppt	–	–	< 5	< 5
8:2 FTS	5 ppt	–	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	–	< 2	< 2
ADONA	3 ppt	–	–	< 3	< 3
HFPO-DA	5 ppt	–	–	< 5	< 5
NEtFOSAA	5 ppt	–	< 5	–	< 5
NFDHA	20 ppt	–	–	< 20	< 20
NMeFOSAA	6 ppt	–	< 6	–	< 6
PFBA	5 ppt	–	–	< 5	< 5
PFBS	3 ppt	–	–	< 3	< 3
PFDA	3 ppt	–	–	< 3	< 3
PFDoA	3 ppt	–	–	< 3	< 3
PFEESA	3 ppt	–	–	< 3	< 3
PFHpA	3 ppt	–	–	< 3	< 3
PFHpS	3 ppt	–	–	< 3	< 3
PFHxS	3 ppt	–	–	< 3	< 3
PFMBA	3 ppt	–	–	< 3	< 3
PFMPA	4 ppt	–	–	< 4	< 4
PFNA	4 ppt	–	–	< 4	< 4
PFOA	4 ppt	–	–	< 4	< 4
PFOS	4 ppt	–	–	< 4	< 4
PFPeS	4 ppt	–	–	< 4	< 4
PFTA	8 ppt	–	< 8	–	< 8
PFTrDA	7 ppt	–	< 7	–	< 7
PFUnA	2 ppt	–	–	< 2	< 2
lithium	9 µg/L	< 9	–	–	< 9

Well D-16 facility 60050 · sample point 61050T · groundwater

Compound	MRL	2023-09-04 SE1	2023-12-12 SE1	2024-03-21 SE2
PFBS	3 ppt	–	< 3	3.3
PFHxA	3 ppt	–	3.5	3.6
PFHxS	3 ppt	–	8.1	7.7
PFPeA	3 ppt	–	5	4.8
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-17A facility 60133 · sample point 60133T · groundwater

Compound	MRL	2023-09-04 SE1	2023-12-12 SE1	2024-03-21 SE2
PFBS	3 ppt	–	3.7	3.8
PFHpA	3 ppt	–	4.9	4.9
PFHxA	3 ppt	–	4.8	5
PFHxS	3 ppt	–	25.7	24.8
PFPeA	3 ppt	–	4.1	3.7
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-18B facility 60134 · sample point 61134T · groundwater

Compound	MRL	2023-09-04 SE1	2023-12-12 SE1	2024-03-21 SE2
PFBS	3 ppt	–	3.9	4.1
PFHxA	3 ppt	–	3.1	3.2
PFHxS	3 ppt	–	8.4	8.3
PFPeA	3 ppt	–	4.6	4.4
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-2 facility 60036 · sample point 61036 · groundwater

Compound	MRL	2024-03-21 SE1	2024-04-10 SE1	2024-09-16 SE2	2024-11-11 SE2
PFHxA	3 ppt	–	3.2	–	< 3
PFHxS	3 ppt	–	< 3	–	3.2
PFPeA	3 ppt	–	4	–	< 3
11Cl-PF3OUdS	5 ppt	–	< 5	–	< 5
4:2 FTS	3 ppt	–	< 3	–	< 3
6:2 FTS	5 ppt	–	< 5	–	< 5
8:2 FTS	5 ppt	–	< 5	–	< 5
9Cl-PF3ONS	2 ppt	–	< 2	–	< 2
ADONA	3 ppt	–	< 3	–	< 3
HFPO-DA	5 ppt	–	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	–	–	< 5
NFDHA	20 ppt	–	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	–	–	< 6
PFBA	5 ppt	–	< 5	–	< 5
PFBS	3 ppt	–	< 3	–	< 3
PFDA	3 ppt	–	< 3	–	< 3
PFDoA	3 ppt	–	< 3	–	< 3
PFEESA	3 ppt	–	< 3	–	< 3
PFHpA	3 ppt	–	< 3	–	< 3
PFHpS	3 ppt	–	< 3	–	< 3
PFMBA	3 ppt	–	< 3	–	< 3
PFMPA	4 ppt	–	< 4	–	< 4
PFNA	4 ppt	–	< 4	–	< 4
PFOA	4 ppt	–	< 4	–	< 4
PFOS	4 ppt	–	< 4	–	< 4
PFPeS	4 ppt	–	< 4	–	< 4
PFTA	8 ppt	< 8	–	–	< 8
PFTrDA	7 ppt	< 7	–	–	< 7
PFUnA	2 ppt	–	< 2	–	< 2
lithium	9 µg/L	< 9	–	< 9	–

Well D-21 facility 60055 · sample point 61055T · groundwater

Compound	MRL	2023-09-04 SE1	2023-12-12 SE1	2024-09-18 SE2	2024-11-11 SE2
PFHxS	3 ppt	–	5.3	–	4.6
11Cl-PF3OUdS	5 ppt	–	< 5	–	< 5
4:2 FTS	3 ppt	–	< 3	–	< 3
6:2 FTS	5 ppt	–	< 5	–	< 5
8:2 FTS	5 ppt	–	< 5	–	< 5
9Cl-PF3ONS	2 ppt	–	< 2	–	< 2
ADONA	3 ppt	–	< 3	–	< 3
HFPO-DA	5 ppt	–	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	–	–	< 5
NFDHA	20 ppt	–	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	–	–	< 6
PFBA	5 ppt	–	< 5	–	< 5
PFBS	3 ppt	–	< 3	–	< 3
PFDA	3 ppt	–	< 3	–	< 3
PFDoA	3 ppt	–	< 3	–	< 3
PFEESA	3 ppt	–	< 3	–	< 3
PFHpA	3 ppt	–	< 3	–	< 3
PFHpS	3 ppt	–	< 3	–	< 3
PFHxA	3 ppt	–	< 3	–	< 3
PFMBA	3 ppt	–	< 3	–	< 3
PFMPA	4 ppt	–	< 4	–	< 4
PFNA	4 ppt	–	< 4	–	< 4
PFOA	4 ppt	–	< 4	–	< 4
PFOS	4 ppt	–	< 4	–	< 4
PFPeA	3 ppt	–	< 3	–	< 3
PFPeS	4 ppt	–	< 4	–	< 4
PFTA	8 ppt	< 8	–	–	< 8
PFTrDA	7 ppt	< 7	–	–	< 7
PFUnA	2 ppt	–	< 2	–	< 2
lithium	9 µg/L	< 9	–	< 9	–

Well D-22 facility 60056 · sample point 61056T · groundwater

Compound	MRL	2023-09-04 SE1	2023-11-16 SE1	2024-03-21 SE2
PFBS	3 ppt	–	3.9	< 3
PFHxS	3 ppt	–	3.8	3.8
PFOS	4 ppt	–	5.9	< 4
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-24 facility 60135 · sample point 61135T · groundwater

Compound	MRL	2023-09-04 SE1	2024-09-18 SE2	2024-11-11 SE2
11Cl-PF3OUdS	5 ppt	< 5	–	< 5
4:2 FTS	3 ppt	< 3	–	< 3
6:2 FTS	5 ppt	< 5	–	< 5
8:2 FTS	5 ppt	< 5	–	< 5
9Cl-PF3ONS	2 ppt	< 2	–	< 2
ADONA	3 ppt	< 3	–	< 3
HFPO-DA	5 ppt	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	< 5	–	< 5
PFBS	3 ppt	< 3	–	< 3
PFDA	3 ppt	< 3	–	< 3
PFDoA	3 ppt	< 3	–	< 3
PFEESA	3 ppt	< 3	–	< 3
PFHpA	3 ppt	< 3	–	< 3
PFHpS	3 ppt	< 3	–	< 3
PFHxA	3 ppt	< 3	–	< 3
PFHxS	3 ppt	< 3	–	< 3
PFMBA	3 ppt	< 3	–	< 3
PFMPA	4 ppt	< 4	–	< 4
PFNA	4 ppt	< 4	–	< 4
PFOA	4 ppt	< 4	–	< 4
PFOS	4 ppt	< 4	–	< 4
PFPeA	3 ppt	< 3	–	< 3
PFPeS	4 ppt	< 4	–	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	< 2	–	< 2
lithium	9 µg/L	< 9	< 9	–

Well D-25 facility 16003 · sample point 16103T · groundwater

Compound	MRL	2023-09-04 SE1	2023-11-16 SE1	2024-03-21 SE2
PFHxS	3 ppt	–	< 3	4.9
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-27 facility 16005 · sample point 16105T · groundwater

Compound	MRL	2023-09-04 SE1	2024-02-08 SE1	2024-03-21 SE2
PFHxS	3 ppt	–	4	4.3
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-7 facility 60041 · sample point 61041T · groundwater

Compound	MRL	2023-09-04 SE1	2023-10-26 SE1	2024-03-21 SE2
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFHxS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well D-8 facility 60042 · sample point 61042T · groundwater

Compound	MRL	2023-09-04 SE1	2024-03-21 SE2
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFHxS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well D-9 facility 60043 · sample point 61043T · groundwater

Compound	MRL	2025-11-24 SE1	2025-12-18 SE2
PFPeA	3 ppt	3.4	3.5
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFHxS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well EX-5A facility 60059 · sample point 61059T · groundwater

Compound	MRL	2023-10-26 SE1	2024-03-21 SE2
PFPeA	3 ppt	3	3
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFHxS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well F-10 facility 60070 · sample point 61070T · groundwater

Compound	MRL	2024-03-28 SE1	2024-09-16 SE2	2024-11-11 SE2
PFHxS	3 ppt	3.7	–	3.7
11Cl-PF3OUdS	5 ppt	< 5	–	< 5
4:2 FTS	3 ppt	< 3	–	< 3
6:2 FTS	5 ppt	< 5	–	< 5
8:2 FTS	5 ppt	< 5	–	< 5
9Cl-PF3ONS	2 ppt	< 2	–	< 2
ADONA	3 ppt	< 3	–	< 3
HFPO-DA	5 ppt	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	< 5	–	< 5
PFBS	3 ppt	< 3	–	< 3
PFDA	3 ppt	< 3	–	< 3
PFDoA	3 ppt	< 3	–	< 3
PFEESA	3 ppt	< 3	–	< 3
PFHpA	3 ppt	< 3	–	< 3
PFHpS	3 ppt	< 3	–	< 3
PFHxA	3 ppt	< 3	–	< 3
PFMBA	3 ppt	< 3	–	< 3
PFMPA	4 ppt	< 4	–	< 4
PFNA	4 ppt	< 4	–	< 4
PFOA	4 ppt	< 4	–	< 4
PFOS	4 ppt	< 4	–	< 4
PFPeA	3 ppt	< 3	–	< 3
PFPeS	4 ppt	< 4	–	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	< 2	–	< 2
lithium	9 µg/L	< 9	< 9	–

Well F-12 facility 60072 · sample point 61072T · groundwater

Compound	MRL	2023-09-07 SE1	2023-09-28 SE1	2024-03-28 SE2
PFBS	3 ppt	–	5.7	3.3
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFHxS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well F-13 facility 60073 · sample point 61073T · groundwater

Compound	MRL	2025-11-24 SE1	2025-12-18 SE2
PFBS	3 ppt	4.8	4.8
PFHxS	3 ppt	7.7	7.2
PFPeA	3 ppt	3.1	< 3
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well F-15 facility 60074 · sample point 61074T · groundwater

Compound	MRL	2023-09-07 SE1	2024-03-28 SE2
PFHxS	3 ppt	4.9	5.3
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well F-19 facility 16001 · sample point 16101T · groundwater

Compound	MRL	2023-09-07 SE1	2024-03-28 SE2
PFHxS	3 ppt	3.6	4.4
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well F-20 facility 16002 · sample point 16102T · groundwater

Compound	MRL	2025-11-24 SE1	2025-12-18 SE2
PFHxS	3 ppt	3	< 3
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well F-3 facility 60122 · sample point 61122T · groundwater

Compound	MRL	2023-09-07 SE1	2023-10-26 SE1	2024-03-28 SE2	2024-04-04 SE2
11Cl-PF3OUdS	5 ppt	–	< 5	–	< 5
4:2 FTS	3 ppt	–	< 3	–	< 3
6:2 FTS	5 ppt	–	< 5	–	< 5
8:2 FTS	5 ppt	–	< 5	–	< 5
9Cl-PF3ONS	2 ppt	–	< 2	–	< 2
ADONA	3 ppt	–	< 3	–	< 3
HFPO-DA	5 ppt	–	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	–	< 5	–
NFDHA	20 ppt	–	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	–	< 6	–
PFBA	5 ppt	–	< 5	–	< 5
PFBS	3 ppt	–	< 3	–	< 3
PFDA	3 ppt	–	< 3	–	< 3
PFDoA	3 ppt	–	< 3	–	< 3
PFEESA	3 ppt	–	< 3	–	< 3
PFHpA	3 ppt	–	< 3	–	< 3
PFHpS	3 ppt	–	< 3	–	< 3
PFHxA	3 ppt	–	< 3	–	< 3
PFHxS	3 ppt	–	< 3	–	< 3
PFMBA	3 ppt	–	< 3	–	< 3
PFMPA	4 ppt	–	< 4	–	< 4
PFNA	4 ppt	–	< 4	–	< 4
PFOA	4 ppt	–	< 4	–	< 4
PFOS	4 ppt	–	< 4	–	< 4
PFPeA	3 ppt	–	< 3	–	< 3
PFPeS	4 ppt	–	< 4	–	< 4
PFTA	8 ppt	< 8	–	< 8	–
PFTrDA	7 ppt	< 7	–	< 7	–
PFUnA	2 ppt	–	< 2	–	< 2
lithium	9 µg/L	< 9	–	< 9	–

Well F-7 facility 61067 · sample point 61067 · groundwater

Compound	MRL	2023-09-07 SE1	2024-03-28 SE2
PFBS	3 ppt	9.2	20.5
PFHxA	3 ppt	4.8	5.6
PFHxS	3 ppt	8.3	11.4
PFPeA	3 ppt	4.5	5.1
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well F-8 facility 60068 · sample point 61068T · groundwater

Compound	MRL	2023-09-07 SE1	2023-10-26 SE1	2024-03-28 SE2
PFHxS	3 ppt	–	3.4	4
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well H-1 facility 60079 · sample point 61079T · groundwater

Compound	MRL	2023-09-14 SE1	2023-09-24 SE1	2024-03-27 SE2
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFHxS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well HGC-2 facility 60080 · sample point 61080T · groundwater

Compound	MRL	2023-09-07 SE1	2024-03-28 SE2
PFHpA	3 ppt	< 3	4
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFHxS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well M-12 facility 60092 · sample point 61092 · groundwater

Compound	MRL	2023-09-14 SE1	2023-09-24 SE1
PFHxS	3 ppt	–	22.3
PFOA	4 ppt	–	5
PFOS	4 ppt	–	28.3
PFPeA	3 ppt	–	3.1
11Cl-PF3OUdS	5 ppt	–	< 5
4:2 FTS	3 ppt	–	< 3
6:2 FTS	5 ppt	–	< 5
8:2 FTS	5 ppt	–	< 5
9Cl-PF3ONS	2 ppt	–	< 2
ADONA	3 ppt	–	< 3
HFPO-DA	5 ppt	–	< 5
NEtFOSAA	5 ppt	< 5	–
NFDHA	20 ppt	–	< 20
NMeFOSAA	6 ppt	< 6	–
PFBA	5 ppt	–	< 5
PFBS	3 ppt	–	< 3
PFDA	3 ppt	–	< 3
PFDoA	3 ppt	–	< 3
PFEESA	3 ppt	–	< 3
PFHpA	3 ppt	–	< 3
PFHpS	3 ppt	–	< 3
PFHxA	3 ppt	–	< 3
PFMBA	3 ppt	–	< 3
PFMPA	4 ppt	–	< 4
PFNA	4 ppt	–	< 4
PFPeS	4 ppt	–	< 4
PFTA	8 ppt	< 8	–
PFTrDA	7 ppt	< 7	–
PFUnA	2 ppt	–	< 2
lithium	9 µg/L	< 9	–

Well M-15 facility 60095 · sample point 61095T · groundwater

Compound	MRL	2023-09-24 SE1	2023-10-26 SE1	2024-03-27 SE2
PFBS	3 ppt	–	3.6	3.7
PFHpA	3 ppt	–	4	4.3
PFHxA	3 ppt	–	5.8	6.3
PFHxS	3 ppt	–	4.8	5.1
PFPeA	3 ppt	–	8.6	8.4
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well M-17A facility 60136 · sample point 61136T · groundwater

Compound	MRL	2023-09-14 SE1	2023-10-26 SE1	2024-03-27 SE2
PFHxA	3 ppt	–	3.8	3.9
PFHxS	3 ppt	–	12	13.8
PFOS	4 ppt	–	< 4	4.1
PFPeA	3 ppt	–	3.7	3.8
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well M-18 facility 60099 · sample point 61099T · groundwater

Compound	MRL	2023-09-14 SE1	2023-10-26 SE1	2024-03-27 SE2
PFHxA	3 ppt	–	4.8	4.6
PFHxS	3 ppt	–	3.3	4.3
PFOS	4 ppt	–	8.2	6.3
PFPeA	3 ppt	–	8.6	6.7
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well M-20A facility 60100 · sample point 61100T · groundwater

Compound	MRL	2023-09-14 SE1	2023-10-26 SE1	2024-03-27 SE2
PFHxA	3 ppt	–	3.3	4
PFHxS	3 ppt	–	7.5	7.2
PFPeA	3 ppt	–	4	4.3
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well M-21 facility 60093 · sample point 61093T · groundwater

Compound	MRL	2023-09-14 SE1	2023-10-26 SE1	2024-04-04 SE2
PFHxA	3 ppt	–	4.2	4.3
PFHxS	3 ppt	–	13.8	12.7
PFOS	4 ppt	–	5.4	7
PFPeA	3 ppt	–	4.8	4.7
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well M-7 facility 60087 · sample point 61087T · groundwater

Compound	MRL	2023-10-26 SE1	2024-03-27 SE2
PFHxA	3 ppt	3.6	3.1
PFHxS	3 ppt	5.3	4.8
PFOS	4 ppt	4.7	< 4
PFPeA	3 ppt	5.2	4
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well M-8 facility 60088 · sample point 61088T · groundwater

Compound	MRL	2023-09-14 SE1	2023-10-26 SE1	2024-03-27 SE2
PFBS	3 ppt	–	6.6	8.2
PFHxA	3 ppt	–	6.1	7.3
PFHxS	3 ppt	–	8.1	12.5
PFPeA	3 ppt	–	5.8	5.1
PFPeS	4 ppt	–	< 4	5.6
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well M-9 facility 60089 · sample point 61089T · groundwater

Compound	MRL	2023-09-14 SE1	2023-12-12 SE1	2024-03-27 SE2
PFBS	3 ppt	–	< 3	8.1
PFHxA	3 ppt	–	< 3	6.8
PFHxS	3 ppt	–	< 3	11.1
PFPeA	3 ppt	–	< 3	4.6
PFPeS	4 ppt	–	< 4	5.3
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well NAS-1 facility 60101 · sample point 61101T · groundwater

Compound	MRL	2023-09-20 SE1	2024-03-23 SE2	2024-04-04 SE2
6:2 FTS	5 ppt	56.3	–	< 5
8:2 FTS	5 ppt	7.5	–	< 5
PFBA	5 ppt	6.8	–	< 5
PFBS	3 ppt	9	–	< 3
PFHpA	3 ppt	14	–	< 3
PFHxA	3 ppt	37.1	–	< 3
PFHxS	3 ppt	80	–	< 3
PFOA	4 ppt	18.3	–	< 4
PFOS	4 ppt	135	–	< 4
PFPeA	3 ppt	16.2	–	< 3
PFPeS	4 ppt	9.9	–	< 4
11Cl-PF3OUdS	5 ppt	< 5	–	< 5
4:2 FTS	3 ppt	< 3	–	< 3
9Cl-PF3ONS	2 ppt	< 2	–	< 2
ADONA	3 ppt	< 3	–	< 3
HFPO-DA	5 ppt	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	< 5	–
NFDHA	20 ppt	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	< 6	–
PFDA	3 ppt	< 3	–	< 3
PFDoA	3 ppt	< 3	–	< 3
PFEESA	3 ppt	< 3	–	< 3
PFHpS	3 ppt	< 3	–	< 3
PFMBA	3 ppt	< 3	–	< 3
PFMPA	4 ppt	< 4	–	< 4
PFNA	4 ppt	< 4	–	< 4
PFTA	8 ppt	< 8	< 8	–
PFTrDA	7 ppt	< 7	< 7	–
PFUnA	2 ppt	< 2	–	< 2
lithium	9 µg/L	< 9	< 9	–

Well Y-1 facility 60102 · sample point 61102T · groundwater

Compound	MRL	2023-09-17 SE1	2024-03-26 SE2	2024-04-04 SE2
PFBS	3 ppt	< 3	–	3.7
PFHpA	3 ppt	< 3	–	3.2
PFHxA	3 ppt	4.7	–	5.6
PFHxS	3 ppt	6.4	–	6.7
PFOS	4 ppt	5.3	–	5.5
PFPeA	3 ppt	5.4	–	7.7
11Cl-PF3OUdS	5 ppt	< 5	–	< 5
4:2 FTS	3 ppt	< 3	–	< 3
6:2 FTS	5 ppt	< 5	–	< 5
8:2 FTS	5 ppt	< 5	–	< 5
9Cl-PF3ONS	2 ppt	< 2	–	< 2
ADONA	3 ppt	< 3	–	< 3
HFPO-DA	5 ppt	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	< 5	–
NFDHA	20 ppt	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	< 6	–
PFBA	5 ppt	< 5	–	< 5
PFDA	3 ppt	< 3	–	< 3
PFDoA	3 ppt	< 3	–	< 3
PFEESA	3 ppt	< 3	–	< 3
PFHpS	3 ppt	< 3	–	< 3
PFMBA	3 ppt	< 3	–	< 3
PFMPA	4 ppt	< 4	–	< 4
PFNA	4 ppt	< 4	–	< 4
PFOA	4 ppt	< 4	–	< 4
PFPeS	4 ppt	< 4	–	< 4
PFTA	8 ppt	< 8	< 8	–
PFTrDA	7 ppt	< 7	< 7	–
PFUnA	2 ppt	< 2	–	< 2
lithium	9 µg/L	< 9	< 9	–

Well Y-10 facility 60111 · sample point 61111T · groundwater

Compound	MRL	2023-09-17 SE1	2023-09-28 SE1	2024-04-24 SE2
PFBS	3 ppt	–	5.1	4.7
PFHxA	3 ppt	–	3.2	4.4
PFPeA	3 ppt	–	4.8	5.4
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well Y-14 facility 60112 · sample point 61112T · groundwater

Compound	MRL	2023-09-17 SE1	2023-11-02 SE1	2024-03-26 SE2
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFHxS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well Y-15 facility 60114 · sample point 61114T · groundwater

Compound	MRL	2023-09-17 SE1	2023-09-28 SE1	2024-03-26 SE2
6:2 FTS	5 ppt	–	148.2	68.3
PFBA	5 ppt	–	5.4	< 5
PFBS	3 ppt	–	3.4	3.9
PFHpA	3 ppt	–	3.6	< 3
PFHxA	3 ppt	–	11.9	7.6
PFHxS	3 ppt	–	6.2	5.9
PFOS	4 ppt	–	4.7	< 4
PFPeA	3 ppt	–	17.8	10.3
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well Y-17 facility 60116 · sample point 61116T · groundwater

Compound	MRL	2023-09-17 SE1	2024-03-28 SE2
PFHpA	3 ppt	3	< 3
PFHxS	3 ppt	6	5.8
PFPeA	3 ppt	3.7	3.7
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well Y-20 facility 16009 · sample point 16109T · groundwater

Compound	MRL	2023-09-17 SE1	2024-04-24 SE2
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBA	5 ppt	< 5	< 5
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFHxA	3 ppt	< 3	< 3
PFHxS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeA	3 ppt	< 3	< 3
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well Y-21A facility 60117 · sample point 61117T · groundwater

Compound	MRL	2023-09-17 SE1	2023-09-28 SE1	2023-11-16 SE1	2024-04-24 SE2
PFBS	3 ppt	–	–	3.2	3.8
PFHpA	3 ppt	–	–	3.2	4
PFHxA	3 ppt	–	–	5.5	6.1
PFHxS	3 ppt	–	–	4.5	4.6
PFPeA	3 ppt	–	–	8	9
11Cl-PF3OUdS	5 ppt	–	–	< 5	< 5
4:2 FTS	3 ppt	–	–	< 3	< 3
6:2 FTS	5 ppt	–	–	< 5	< 5
8:2 FTS	5 ppt	–	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	–	< 2	< 2
ADONA	3 ppt	–	–	< 3	< 3
HFPO-DA	5 ppt	–	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	–	< 5
NFDHA	20 ppt	–	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	–	< 6
PFBA	5 ppt	–	–	< 5	< 5
PFDA	3 ppt	–	–	< 3	< 3
PFDoA	3 ppt	–	–	< 3	< 3
PFEESA	3 ppt	–	–	< 3	< 3
PFHpS	3 ppt	–	–	< 3	< 3
PFMBA	3 ppt	–	–	< 3	< 3
PFMPA	4 ppt	–	–	< 4	< 4
PFNA	4 ppt	–	–	< 4	< 4
PFOA	4 ppt	–	–	< 4	< 4
PFOS	4 ppt	–	–	< 4	< 4
PFPeS	4 ppt	–	–	< 4	< 4
PFTA	8 ppt	< 8	–	–	< 8
PFTrDA	7 ppt	< 7	–	–	< 7
PFUnA	2 ppt	–	–	< 2	< 2
lithium	9 µg/L	–	< 9	–	< 9

Well Y-22 facility 16010 · sample point 16110T · groundwater

Compound	MRL	2023-09-17 SE1	2023-09-28 SE1	2024-04-24 SE2
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
6:2 FTS	5 ppt	–	< 5	< 5
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	–	< 5	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	–	< 6	< 6
PFBA	5 ppt	–	< 5	< 5
PFBS	3 ppt	–	< 3	< 3
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFHxA	3 ppt	–	< 3	< 3
PFHxS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFOA	4 ppt	–	< 4	< 4
PFOS	4 ppt	–	< 4	< 4
PFPeA	3 ppt	–	< 3	< 3
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	–	< 8	< 8
PFTrDA	7 ppt	–	< 7	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Well Y-23 facility 60118 · sample point 61118T · groundwater

Compound	MRL	2023-09-17 SE1	2024-03-28 SE2
PFBA	5 ppt	6.3	< 5
PFHpA	3 ppt	7.4	5.8
PFHxA	3 ppt	11.1	9.5
PFHxS	3 ppt	< 3	3
PFPeA	3 ppt	18.4	15.6
11Cl-PF3OUdS	5 ppt	< 5	< 5
4:2 FTS	3 ppt	< 3	< 3
6:2 FTS	5 ppt	< 5	< 5
8:2 FTS	5 ppt	< 5	< 5
9Cl-PF3ONS	2 ppt	< 2	< 2
ADONA	3 ppt	< 3	< 3
HFPO-DA	5 ppt	< 5	< 5
NEtFOSAA	5 ppt	< 5	< 5
NFDHA	20 ppt	< 20	< 20
NMeFOSAA	6 ppt	< 6	< 6
PFBS	3 ppt	< 3	< 3
PFDA	3 ppt	< 3	< 3
PFDoA	3 ppt	< 3	< 3
PFEESA	3 ppt	< 3	< 3
PFHpS	3 ppt	< 3	< 3
PFMBA	3 ppt	< 3	< 3
PFMPA	4 ppt	< 4	< 4
PFNA	4 ppt	< 4	< 4
PFOA	4 ppt	< 4	< 4
PFOS	4 ppt	< 4	< 4
PFPeS	4 ppt	< 4	< 4
PFTA	8 ppt	< 8	< 8
PFTrDA	7 ppt	< 7	< 7
PFUnA	2 ppt	< 2	< 2
lithium	9 µg/L	< 9	< 9

Well Y-5 facility 60106 · sample point 61106T · groundwater

Compound	MRL	2023-09-17 SE1	2024-03-26 SE2	2024-04-04 SE2
11Cl-PF3OUdS	5 ppt	< 5	–	< 5
4:2 FTS	3 ppt	< 3	–	< 3
6:2 FTS	5 ppt	< 5	–	< 5
8:2 FTS	5 ppt	< 5	–	< 5
9Cl-PF3ONS	2 ppt	< 2	–	< 2
ADONA	3 ppt	< 3	–	< 3
HFPO-DA	5 ppt	< 5	–	< 5
NEtFOSAA	5 ppt	< 5	< 5	–
NFDHA	20 ppt	< 20	–	< 20
NMeFOSAA	6 ppt	< 6	< 6	–
PFBA	5 ppt	< 5	–	< 5
PFBS	3 ppt	< 3	–	< 3
PFDA	3 ppt	< 3	–	< 3
PFDoA	3 ppt	< 3	–	< 3
PFEESA	3 ppt	< 3	–	< 3
PFHpA	3 ppt	< 3	–	< 3
PFHpS	3 ppt	< 3	–	< 3
PFHxA	3 ppt	< 3	–	< 3
PFHxS	3 ppt	< 3	–	< 3
PFMBA	3 ppt	< 3	–	< 3
PFMPA	4 ppt	< 4	–	< 4
PFNA	4 ppt	< 4	–	< 4
PFOA	4 ppt	< 4	–	< 4
PFOS	4 ppt	< 4	–	< 4
PFPeA	3 ppt	< 3	–	< 3
PFPeS	4 ppt	< 4	–	< 4
PFTA	8 ppt	< 8	< 8	–
PFTrDA	7 ppt	< 7	< 7	–
PFUnA	2 ppt	< 2	–	< 2
lithium	9 µg/L	< 9	< 9	–

Well Y-9 facility 60110 · sample point 61110T · groundwater

Compound	MRL	2023-09-17 SE1	2023-11-02 SE1	2024-03-26 SE2
6:2 FTS	5 ppt	–	11	6.8
PFBA	5 ppt	–	6.7	6.5
PFBS	3 ppt	–	7.4	7.2
PFHpA	3 ppt	–	8.9	10
PFHxA	3 ppt	–	14	14.5
PFHxS	3 ppt	–	7.7	8.6
PFOA	4 ppt	–	6.3	7
PFOS	4 ppt	–	7.3	6.9
PFPeA	3 ppt	–	20.7	19.8
11Cl-PF3OUdS	5 ppt	–	< 5	< 5
4:2 FTS	3 ppt	–	< 3	< 3
8:2 FTS	5 ppt	–	< 5	< 5
9Cl-PF3ONS	2 ppt	–	< 2	< 2
ADONA	3 ppt	–	< 3	< 3
HFPO-DA	5 ppt	–	< 5	< 5
NEtFOSAA	5 ppt	< 5	–	< 5
NFDHA	20 ppt	–	< 20	< 20
NMeFOSAA	6 ppt	< 6	–	< 6
PFDA	3 ppt	–	< 3	< 3
PFDoA	3 ppt	–	< 3	< 3
PFEESA	3 ppt	–	< 3	< 3
PFHpS	3 ppt	–	< 3	< 3
PFMBA	3 ppt	–	< 3	< 3
PFMPA	4 ppt	–	< 4	< 4
PFNA	4 ppt	–	< 4	< 4
PFPeS	4 ppt	–	< 4	< 4
PFTA	8 ppt	< 8	–	< 8
PFTrDA	7 ppt	< 7	–	< 7
PFUnA	2 ppt	–	< 2	< 2
lithium	9 µg/L	< 9	–	< 9

Statistics by compound

Compound	Results	Detected	Highest (date)	Mean bounds	KM median	P75	P90	P95
PFHxS	121	66%	80 2023-09-20	6.11–7.13	4.6	7.7	12	22.3
PFPeA	121	54%	47.5 2023-09-21	4.15–5.51	3.1	5.2	8.6	16.2
PFHxA	121	46%	37.1 2023-09-20	3.21–4.82	<MRL	4.7	6.3	11.1
PFBS	121	36%	34.9 2023-09-21	2.4–4.33	<MRL	3.8	5.7	8.2
PFOS	121	31%	135 2023-09-20	5.7–8.48	<MRL	5.9	14	16.2
PFHpA	121	18%	18.5 2023-09-21	1.11–3.57	<MRL	<MRL	4	5.8
PFOA	121	7%	18.3 2023-09-20	0.68–4.38	<MRL	<MRL	<MRL	6.3
PFBA	121	7%	18.1 2023-09-21	0.56–5.23	<MRL	<MRL	<MRL	6.1
6:2 FTS	121	4%	148.2 2023-09-28	2.4–7.2	<MRL	<MRL	<MRL	<MRL
PFPeS	121	3%	9.9 2023-09-20	0.21–4.07	<MRL	<MRL	<MRL	<MRL
8:2 FTS	121	1%	7.5 2023-09-20	0.06–5.02	<MRL	<MRL	<MRL	<MRL

Never detected (19): 11Cl-PF3OUdS, 4:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpS, PFMBA, PFMPA, PFNA, PFTA, PFTrDA, PFUnA, lithium.

Left-censored Kaplan–Meier statistics (Helsel 2005; Helsel & Lee 2006, NADA for R). Units: ppt; lithium µg/L. Each compound has one reporting limit, so the Kaplan–Meier mean equals the upper mean bound (non-detects at the MRL); the lower bound sets non-detects to 0. “<MRL” = the percentile falls below the reporting limit and cannot be estimated. These describe this system's UCMR 5 samples, not population estimates.

Sources

EPA UCMR 5 occurrence data text files (UCMR5_All.txt; samples 2023-09-04 to 2025-12-18; data summary dated Jul 2026)
EPA SDWIS via ECHO SDWA downloads, quarter 2026Q3
EPA Public Water System Service Areas v3 (Mar 2026)
US Census Bureau cartographic boundary counties 1:500k, 2024
EPA/USGS NHDPlus V2 (medium resolution) flowlines, Strahler order 2+

Data build b15752fd5a84 · 2026-10-18T04:03Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.