- PWSID
- PA3390073
- State
- Pennsylvania
- System type
- community water system (CWS)
- Population served
- 47,693
- City
- Allentown
- Counties
- Lehigh County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2023-03-08 to 2024-01-31 · 14 entry point(s) · water types: GW;SW
- Service-area boundary
- authoritative
PFOA 1–3 × its limit highest single result
PFOA 1–3 × its limit worst entry-point average
Open on the Pennsylvania map · All Pennsylvania 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.
Water purchased from
- Swt Main System (PA3390065)
Seller's highest results: PFOA 4 ppt · PFOS <MRL · HI 0 · detected: PFHxA;PFOA;PFPeA - Lca Allentown Division (PA3390024)
Seller's highest results: PFOA <MRL · PFOS 4.4 ppt · HI 0.002 · detected: PFBS;PFHxA;PFOS;PFPeA - Salisbury Twp Water System (PA3390062)
Seller's highest results: PFOA 4.5 ppt · PFOS 4.2 ppt · HI 0.002 · detected: PFBS;PFHxA;PFOA;PFOS;PFPeA
Seller results are the seller's own entry-point samples, not measurements of this system's water. This system's own samples (below) may reflect purchased water, its own sources, or both.
Compared with EPA's 2024 values
| Highest single result | Worst entry-point average* | Limit | |
|---|---|---|---|
| PFOA (ppt) | 4.4 | 4.35 | 4 |
| PFOS (ppt) | <MRL | 0 | 4 |
| Hazard Index | 0.31 | 0.155 | 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).
Compared with Pennsylvania standards
| Highest single result | Worst entry-point average* | Pennsylvania | |
|---|---|---|---|
| PFOA (ppt) | 4.4 | 4.35 | 14 |
| PFOS (ppt) | 0 | 0 | 18 |
Sum standards add the listed compounds within each sample (non-detects = 0). State compliance is normally judged on averages over time; these are screening comparisons.
Sampling history
Sampled 2023-03-08 to 2024-01-31 · 14 entry point(s) · water types: GW;SW · 46 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-03-08 | Allentown Connection (SW) | SE1 | n/a | n/a | n/a | none |
| 2023-03-08 | Well #1 Wellhouse (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-03-08 | Well #10 Pump House (GW) | SE1 | 4.4 | <4 | 0.31 | none |
| 2023-03-08 | Well #11 Pump House (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-03-08 | Well #16 Wellhouse (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-03-08 | Well #8 Pump House (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-03-15 | Well #20 Wellhouse (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-03-15 | Well #5 Pump House (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-03-15 | Well #6 Wellhouse (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-03-15 | Wells #23 & #24 Treatment Bldg. (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-03-16 | Well #12R Wellhouse (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-03-16 | Well #13 Wellhouse (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-03-16 | Well #17 Pump House (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-03-16 | Well #9 Pump House (GW) | SE1 | <4 | <4 | 0 | PFPeA 3.4 |
| 2023-04-04 | Well #11 Pump House (GW) | SE1 | <4 | <4 | 0.002 | none |
| 2023-04-04 | Well #16 Wellhouse (GW) | SE1 | 4.4 | <4 | 0.002 | none |
| 2023-06-07 | Allentown Connection (SW) | SE2 | <4 | <4 | 0 | PFPeA 3.9 |
| 2023-07-03 | Well #1 Wellhouse (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-07-03 | Well #12R Wellhouse (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-07-03 | Well #20 Wellhouse (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-07-03 | Well #8 Pump House (GW) | SE1 | <4 | <4 | 0 | PFHxA 3, PFPeA 4.1 |
| 2023-09-07 | Allentown Connection (SW) | SE3 | <4 | <4 | 0 | PFHxA 3.3, PFPeA 4.2 |
| 2023-09-07 | Well #1 Wellhouse (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-09-07 | Well #10 Pump House (GW) | SE2 | 4.3 | <4 | 0 | none |
| 2023-09-07 | Well #11 Pump House (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-07 | Well #16 Wellhouse (GW) | SE2 | 4.2 | <4 | 0.002 | none |
| 2023-09-07 | Well #8 Pump House (GW) | SE2 | <4 | <4 | 0 | PFPeA 3.5 |
| 2023-09-14 | Well #12R Wellhouse (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-14 | Well #13 Wellhouse (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-14 | Well #17 Pump House (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-14 | Well #20 Wellhouse (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-14 | Well #5 Pump House (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-14 | Well #6 Wellhouse (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-14 | Well #9 Pump House (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-09-14 | Wells #23 & #24 Treatment Bldg. (GW) | SE2 | n/a | n/a | n/a | none |
| 2023-10-05 | Well #17 Pump House (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-24 | Well #20 Wellhouse (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-24 | Well #5 Pump House (GW) | SE2 | <4 | <4 | 0 | PFPeA 5.4 |
| 2023-10-24 | Wells #23 & #24 Treatment Bldg. (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-25 | Well #12R Wellhouse (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-25 | Well #13 Wellhouse (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-25 | Well #9 Pump House (GW) | SE2 | <4 | <4 | 0.002 | none |
| 2023-11-29 | Allentown Connection (SW) | SE4 | <4 | <4 | 0 | PFPeA 3.7 |
| 2023-11-29 | Well #11 Pump House (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-11-29 | Well #6 Wellhouse (GW) | SE2 | <4 | <4 | 0 | none |
| 2024-01-31 | Allentown Connection (SW) | SE1 | <4 | <4 | 0 | PFPeA 3.5 |
“<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
900 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.
Allentown Connection facility 00126 · sample point 126 · surface water
| Compound | MRL | 2023-03-08 SE1 | 2023-06-07 SE2 | 2023-09-07 SE3 | 2023-11-29 SE4 | 2024-01-31 SE1 |
|---|---|---|---|---|---|---|
| PFHxA | 3 ppt | – | < 3 | 3.3 | < 3 | < 3 |
| PFPeA | 3 ppt | – | 3.9 | 4.2 | 3.7 | 3.5 |
| 11Cl-PF3OUdS | 5 ppt | – | < 5 | < 5 | < 5 | < 5 |
| 4:2 FTS | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| 6:2 FTS | 5 ppt | – | < 5 | < 5 | < 5 | < 5 |
| 8:2 FTS | 5 ppt | – | < 5 | < 5 | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | – | < 2 | < 2 | < 2 | < 2 |
| ADONA | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| HFPO-DA | 5 ppt | – | < 5 | < 5 | < 5 | < 5 |
| NEtFOSAA | 5 ppt | < 5 | < 5 | < 5 | < 5 | – |
| NFDHA | 20 ppt | – | < 20 | < 20 | < 20 | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 | < 6 | < 6 | – |
| PFBA | 5 ppt | – | < 5 | < 5 | < 5 | < 5 |
| PFBS | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFDA | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFDoA | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFEESA | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFHpA | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFHpS | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFHxS | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFMBA | 3 ppt | – | < 3 | < 3 | < 3 | < 3 |
| PFMPA | 4 ppt | – | < 4 | < 4 | < 4 | < 4 |
| PFNA | 4 ppt | – | < 4 | < 4 | < 4 | < 4 |
| PFOA | 4 ppt | – | < 4 | < 4 | < 4 | < 4 |
| PFOS | 4 ppt | – | < 4 | < 4 | < 4 | < 4 |
| PFPeS | 4 ppt | – | < 4 | < 4 | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | < 7 | < 7 | – |
| PFUnA | 2 ppt | – | < 2 | < 2 | < 2 | < 2 |
| lithium | 9 µg/L | < 9 | < 9 | < 9 | < 9 | – |
Well #1 Wellhouse facility 00101 · sample point 101 · groundwater
| Compound | MRL | 2023-03-08 SE1 | 2023-07-03 SE1 | 2023-09-07 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 #10 Pump House facility 00110 · sample point 110 · groundwater
| Compound | MRL | 2023-03-08 SE1 | 2023-09-07 SE2 |
|---|---|---|---|
| PFHxS | 3 ppt | 3.1 | < 3 |
| PFOA | 4 ppt | 4.4 | 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 |
| 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 #11 Pump House facility 00111 · sample point 111 · groundwater
| Compound | MRL | 2023-03-08 SE1 | 2023-04-04 SE1 | 2023-09-07 SE2 | 2023-11-29 SE2 |
|---|---|---|---|---|---|
| PFBS | 3 ppt | – | 3.3 | – | < 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 #12R Wellhouse facility 00112 · sample point 112 · groundwater
| Compound | MRL | 2023-03-16 SE1 | 2023-07-03 SE1 | 2023-09-14 SE2 | 2023-10-25 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 #13 Wellhouse facility 00113 · sample point 113 · groundwater
| Compound | MRL | 2023-03-16 SE1 | 2023-09-14 SE2 | 2023-10-25 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 #16 Wellhouse facility 00116 · sample point 116 · groundwater
| Compound | MRL | 2023-03-08 SE1 | 2023-04-04 SE1 | 2023-09-07 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | – | 3.8 | 3.6 |
| PFOA | 4 ppt | – | 4.4 | 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 |
| 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 |
| 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 #17 Pump House facility 00117 · sample point 117 · groundwater
| Compound | MRL | 2023-03-16 SE1 | 2023-09-14 SE2 | 2023-10-05 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 #20 Wellhouse facility 00120 · sample point 120 · groundwater
| Compound | MRL | 2023-03-15 SE1 | 2023-07-03 SE1 | 2023-09-14 SE2 | 2023-10-24 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 #5 Pump House facility 00105 · sample point 105 · groundwater
| Compound | MRL | 2023-03-15 SE1 | 2023-09-14 SE2 | 2023-10-24 SE2 |
|---|---|---|---|---|
| PFPeA | 3 ppt | < 3 | – | 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 |
| 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 #6 Wellhouse facility 00106 · sample point 106 · groundwater
| Compound | MRL | 2023-03-15 SE1 | 2023-09-14 SE2 | 2023-11-29 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 #8 Pump House facility 00108 · sample point 108 · groundwater
| Compound | MRL | 2023-03-08 SE1 | 2023-07-03 SE1 | 2023-09-07 SE2 |
|---|---|---|---|---|
| PFHxA | 3 ppt | – | 3 | < 3 |
| PFPeA | 3 ppt | – | 4.1 | 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 |
| 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 #9 Pump House facility 00109 · sample point 109 · groundwater
| Compound | MRL | 2023-03-16 SE1 | 2023-09-14 SE2 | 2023-10-25 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | < 3 | – | 3.6 |
| 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 |
| 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 | – |
Wells #23 & #24 Treatment Bldg. facility 00123 · sample point 123 · groundwater
| Compound | MRL | 2023-03-15 SE1 | 2023-09-14 SE2 | 2023-10-24 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 | – |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFPeA | 30 | 27% | 5.4 2023-10-24 | 1.06–3.26 | <MRL | 3.4 | 3.9 | 4.2 |
| PFBS | 30 | 13% | 3.8 2023-04-04 | 0.48–3.08 | <MRL | <MRL | 3.3 | 3.6 |
| PFOA | 30 | 13% | 4.4 2023-03-08 | 0.58–4.04 | <MRL | <MRL | 4.2 | 4.4 |
| PFHxA | 30 | 7% | 3.3 2023-09-07 | 0.21–3.01 | <MRL | <MRL | <MRL | 3 |
| PFHxS | 30 | 3% | 3.1 2023-03-08 | 0.1–3 | <MRL | <MRL | <MRL | <MRL |
Never detected (25): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFBA, PFDA, PFDoA, PFEESA, PFHpA, PFHpS, PFMBA, PFMPA, PFNA, PFOS, PFPeS, 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 2023-01-10 to 2026-04-09; 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 52bd2907cbc3 · 2026-10-18T04:10Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.