- PWSID
- PA1090089
- State
- Pennsylvania
- System type
- community water system (CWS)
- Population served
- 36,750
- City
- Richboro
- Counties
- Bucks County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2024-12-11 to 2025-09-03 · 16 entry point(s) · water types: GW;MX
- Service-area boundary
- authoritative
PFOS ≥ 3 × its limit highest single result
PFOS ≥ 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
- Bcwsa Main Lower South (PA1090079)
Seller's highest results: PFOA 7.3 ppt · PFOS 6.9 ppt · HI 0.483 · detected: PFBA;PFBS;PFHpA;PFHxA;PFHxS;PFOA;PFOS;PFPeA - Warminster Municipal Authority (PA1090069)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0 · detected: PFBA;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) | 19.6 | 19.45 | 4 |
| PFOS (ppt) | 23 | 22.15 | 4 |
| Hazard Index | 0.553 | 0.482 | 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) | 19.6 | 19.45 | 14 |
| PFOS (ppt) | 23 | 22.15 | 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 2024-12-11 to 2025-09-03 · 16 entry point(s) · water types: GW;MX · 35 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2024-12-11 | Purchased Water Connection (MX) | SE1 | <4 | <4 | 0 | none |
| 2024-12-11 | Well #1 Treatment (GW) | SE1 | 11.5 | 9.6 | 0.553 | PFBA 5.1, PFHpA 4.1, PFHxA 6.7, PFPeA 6.8 |
| 2024-12-11 | Well #10 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2024-12-11 | Well #11 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-12-11 | Well #12 Treatment (GW) | SE1 | 11.8 | 7.2 | 0.492 | PFHpA 3.7, PFHxA 6.9, PFPeA 7.4 |
| 2024-12-11 | Well #13 Treatment (GW) | SE1 | 15.2 | 13.7 | 0.403 | PFBA 7.5, PFHpA 8.2, PFHxA 12.1, PFPeA 14.9, lithium 14.9 µg/L |
| 2024-12-11 | Well #16 Treatment (GW) | SE1 | 4.5 | <4 | 0 | lithium 10.7 µg/L |
| 2024-12-11 | Well #17 Treatment (GW) | SE1 | 11.1 | 8.8 | 0.003 | PFHpA 3.7, PFHxA 5.7, PFPeA 5.7 |
| 2024-12-11 | Well #2 Treatment (GW) | SE1 | 13.9 | 11.3 | 0.002 | PFBA 6.2, PFHpA 6.1, PFHxA 11.8, PFPeA 14.8 |
| 2024-12-11 | Well #3 Treatment (GW) | SE1 | 17 | 10.4 | 0.003 | PFBA 6.9, PFHpA 5.7, PFHxA 10, PFPeA 10.5 |
| 2024-12-11 | Well #4 Treatment (GW) | SE1 | 19.6 | 23 | 0.407 | PFBA 5.4, PFHpA 5.1, PFHxA 7.4, PFPeA 7.1 |
| 2024-12-11 | Well #5 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2024-12-11 | Well #6 Treatment (GW) | SE1 | 7.9 | <4 | 0 | PFHxA 5.5, PFPeA 5.4, lithium 18.7 µg/L |
| 2024-12-11 | Well #7 Treatment (GW) | SE1 | 9.2 | 15 | 0.002 | PFHxA 4, PFPeA 4.1 |
| 2024-12-11 | Well #8 Treatment (GW) | SE1 | 11 | 10.7 | 0.002 | PFHpA 3.8, PFHxA 5.8, PFPeA 6.1 |
| 2024-12-11 | Well #9 Treatment (GW) | SE1 | 11.4 | 9.6 | 0.002 | PFHpA 3.5, PFHxA 4.4, PFPeA 4.3 |
| 2024-12-19 | Well #11 Treatment (GW) | SE1 | 11.2 | 8.1 | 0.332 | PFHpA 3.2, PFHxA 5.9, PFPeA 4.2 |
| 2025-03-19 | Purchased Water Connection (MX) | SE2 | <4 | <4 | 0 | none |
| 2025-06-11 | Well #1 Treatment (GW) | SE2 | 10 | 7.4 | 0.353 | PFHpA 3.4, PFHxA 4.9, PFPeA 5 |
| 2025-06-11 | Well #10 Treatment (GW) | SE2 | 15.9 | 8.9 | 0.003 | PFBA 6.1, PFHpA 5.6, PFHxA 16.1, PFPeA 12.1 |
| 2025-06-11 | Well #11 Treatment (GW) | SE2 | 11.8 | 9 | 0.002 | PFHpA 3.4, PFHxA 7.1, PFPeA 5 |
| 2025-06-11 | Well #12 Treatment (GW) | SE2 | 12.1 | 7 | 0.472 | PFHpA 3.7, PFHxA 6.8, PFPeA 7.5 |
| 2025-06-11 | Well #13 Treatment (GW) | SE2 | 16.8 | 14.4 | 0.433 | PFBA 7.6, PFHpA 8.6, PFHxA 13.2, PFPeA 16.7, lithium 15.6 µg/L |
| 2025-06-11 | Well #16 Treatment (GW) | SE2 | 7.7 | 4.8 | 0.002 | lithium 14.5 µg/L |
| 2025-06-11 | Well #17 Treatment (GW) | SE2 | 11.8 | 8.8 | 0.003 | PFHpA 3.6, PFHxA 5.9, PFPeA 5.6 |
| 2025-06-11 | Well #2 Treatment (GW) | SE2 | 18.1 | 13.3 | 0.002 | PFBA 8.1, PFHpA 7.7, PFHxA 17.5, PFPeA 20.6 |
| 2025-06-11 | Well #3 Treatment (GW) | SE2 | 12.1 | 8.8 | 0.003 | PFBA 5.4, PFHpA 4, PFHxA 6.4, PFPeA 6.7 |
| 2025-06-11 | Well #4 Treatment (GW) | SE2 | 19.3 | 21.3 | 0.366 | PFBA 5.4, PFHpA 5.3, PFHxA 8.1, PFPeA 7.2 |
| 2025-06-11 | Well #5 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2025-06-11 | Well #6 Treatment (GW) | SE2 | 8.2 | <4 | 0 | PFHxA 5.4, PFPeA 5.5, lithium 19.2 µg/L |
| 2025-06-11 | Well #7 Treatment (GW) | SE2 | 9.7 | 16.8 | 0.002 | PFHxA 4.1, PFPeA 4.4 |
| 2025-06-11 | Well #8 Treatment (GW) | SE2 | 10.6 | 8.8 | 0.002 | PFBA 5.2, PFHpA 4.8, PFHxA 7.2, PFPeA 8.9 |
| 2025-06-11 | Well #9 Treatment (GW) | SE2 | 10.6 | 10.2 | 0.003 | PFHpA 3.3, PFHxA 4.4, PFPeA 4.1 |
| 2025-06-23 | Purchased Water Connection (MX) | SE3 | <4 | <4 | 0 | none |
| 2025-09-03 | Purchased Water Connection (MX) | SE4 | <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
1020 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.
Purchased Water Connection facility 00116 · sample point 116 · MX
| Compound | MRL | 2024-12-11 SE1 | 2025-03-19 SE2 | 2025-06-23 SE3 | 2025-09-03 SE4 |
|---|---|---|---|---|---|
| 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 |
| PFHxA | 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 |
| PFPeA | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| 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 Treatment facility 00101 · sample point 101 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 5.1 | < 5 |
| PFBS | 3 ppt | 6.2 | 5.5 |
| PFHpA | 3 ppt | 4.1 | 3.4 |
| PFHxA | 3 ppt | 6.7 | 4.9 |
| PFHxS | 3 ppt | 5.5 | 3.5 |
| PFOA | 4 ppt | 11.5 | 10 |
| PFOS | 4 ppt | 9.6 | 7.4 |
| PFPeA | 3 ppt | 6.8 | 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 |
| 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 #10 Treatment facility 00109 · sample point 109 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | < 5 | 6.1 |
| PFBS | 3 ppt | < 3 | 6.7 |
| PFHpA | 3 ppt | < 3 | 5.6 |
| PFHxA | 3 ppt | < 3 | 16.1 |
| PFOA | 4 ppt | < 4 | 15.9 |
| PFOS | 4 ppt | < 4 | 8.9 |
| PFPeA | 3 ppt | < 3 | 12.1 |
| 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 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 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 |
| 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 Treatment facility 00108 · sample point 108 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2024-12-19 SE1 | 2025-06-11 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | – | 4.3 | 4.6 |
| PFHpA | 3 ppt | – | 3.2 | 3.4 |
| PFHxA | 3 ppt | – | 5.9 | 7.1 |
| PFHxS | 3 ppt | – | 3.3 | < 3 |
| PFOA | 4 ppt | – | 11.2 | 11.8 |
| PFOS | 4 ppt | – | 8.1 | 9 |
| PFPeA | 3 ppt | – | 4.2 | 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 |
| 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 #12 Treatment facility 00110 · sample point 110 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | 4.8 | 4.6 |
| PFHpA | 3 ppt | 3.7 | 3.7 |
| PFHxA | 3 ppt | 6.9 | 6.8 |
| PFHxS | 3 ppt | 4.9 | 4.7 |
| PFOA | 4 ppt | 11.8 | 12.1 |
| PFOS | 4 ppt | 7.2 | 7 |
| PFPeA | 3 ppt | 7.4 | 7.5 |
| 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 |
| 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 #13 Treatment facility 00115 · sample point 115 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 7.5 | 7.6 |
| PFBS | 3 ppt | 6.2 | 6.8 |
| PFHpA | 3 ppt | 8.2 | 8.6 |
| PFHxA | 3 ppt | 12.1 | 13.2 |
| PFNA | 4 ppt | 4 | 4.3 |
| PFOA | 4 ppt | 15.2 | 16.8 |
| PFOS | 4 ppt | 13.7 | 14.4 |
| PFPeA | 3 ppt | 14.9 | 16.7 |
| 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 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 3 ppt | < 3 | < 3 |
| PFHpS | 3 ppt | < 3 | < 3 |
| PFHxS | 3 ppt | < 3 | < 3 |
| PFMBA | 3 ppt | < 3 | < 3 |
| PFMPA | 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 | 14.9 | 15.6 |
Well #16 Treatment facility 00113 · sample point 113 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | < 3 | 3.5 |
| PFOA | 4 ppt | 4.5 | 7.7 |
| PFOS | 4 ppt | < 4 | 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 |
| 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 |
| 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 | 10.7 | 14.5 |
Well #17 Treatment facility 00114 · sample point 114 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | 6.7 | 6.7 |
| PFHpA | 3 ppt | 3.7 | 3.6 |
| PFHxA | 3 ppt | 5.7 | 5.9 |
| PFOA | 4 ppt | 11.1 | 11.8 |
| PFOS | 4 ppt | 8.8 | 8.8 |
| PFPeA | 3 ppt | 5.7 | 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 |
| 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 |
| 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 #2 Treatment facility 00102 · sample point 102 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 6.2 | 8.1 |
| PFBS | 3 ppt | 3 | 3.5 |
| PFHpA | 3 ppt | 6.1 | 7.7 |
| PFHxA | 3 ppt | 11.8 | 17.5 |
| PFOA | 4 ppt | 13.9 | 18.1 |
| PFOS | 4 ppt | 11.3 | 13.3 |
| PFPeA | 3 ppt | 14.8 | 20.6 |
| 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 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 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 |
| 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 #3 Treatment facility 00103 · sample point 103 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 6.9 | 5.4 |
| PFBS | 3 ppt | 5.4 | 5.3 |
| PFHpA | 3 ppt | 5.7 | 4 |
| PFHxA | 3 ppt | 10 | 6.4 |
| PFOA | 4 ppt | 17 | 12.1 |
| PFOS | 4 ppt | 10.4 | 8.8 |
| PFPeA | 3 ppt | 10.5 | 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 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 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 |
| 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 #4 Treatment facility 00104 · sample point 104 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 5.4 | 5.4 |
| PFBS | 3 ppt | 14.9 | 13 |
| PFHpA | 3 ppt | 5.1 | 5.3 |
| PFHxA | 3 ppt | 7.4 | 8.1 |
| PFHxS | 3 ppt | 4 | 3.6 |
| PFOA | 4 ppt | 19.6 | 19.3 |
| PFOS | 4 ppt | 23 | 21.3 |
| PFPeA | 3 ppt | 7.1 | 7.2 |
| 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 |
| 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 #5 Treatment facility 00111 · sample point 111 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 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 #6 Treatment facility 00112 · sample point 112 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFHxA | 3 ppt | 5.5 | 5.4 |
| PFOA | 4 ppt | 7.9 | 8.2 |
| PFPeA | 3 ppt | 5.4 | 5.5 |
| 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 |
| 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 | 18.7 | 19.2 |
Well #7 Treatment facility 00105 · sample point 105 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | 4.5 | 4.7 |
| PFHxA | 3 ppt | 4 | 4.1 |
| PFOA | 4 ppt | 9.2 | 9.7 |
| PFOS | 4 ppt | 15 | 16.8 |
| PFPeA | 3 ppt | 4.1 | 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 |
| PFHxS | 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 #8 Treatment facility 00106 · sample point 106 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | < 5 | 5.2 |
| PFBS | 3 ppt | 4 | 4.8 |
| PFHpA | 3 ppt | 3.8 | 4.8 |
| PFHxA | 3 ppt | 5.8 | 7.2 |
| PFOA | 4 ppt | 11 | 10.6 |
| PFOS | 4 ppt | 10.7 | 8.8 |
| PFPeA | 3 ppt | 6.1 | 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 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 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 |
| 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 Treatment facility 00107 · sample point 107 · groundwater
| Compound | MRL | 2024-12-11 SE1 | 2025-06-11 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | 4.3 | 5.1 |
| PFHpA | 3 ppt | 3.5 | 3.3 |
| PFHxA | 3 ppt | 4.4 | 4.4 |
| PFOA | 4 ppt | 11.4 | 10.6 |
| PFOS | 4 ppt | 9.6 | 10.2 |
| PFPeA | 3 ppt | 4.3 | 4.1 |
| 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 |
| PFHxS | 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 |
|---|---|---|---|---|---|---|---|---|
| PFOA | 34 | 79% | 19.6 2024-12-11 | 9.71–10.53 | 11 | 12.1 | 17 | 19.3 |
| PFHxA | 34 | 74% | 17.5 2025-06-11 | 5.69–6.48 | 5.7 | 7.2 | 12.1 | 16.1 |
| PFPeA | 34 | 74% | 20.6 2025-06-11 | 5.9–6.69 | 5.4 | 7.4 | 14.8 | 16.7 |
| PFBS | 34 | 71% | 14.9 2024-12-11 | 4.09–4.97 | 4.5 | 5.5 | 6.7 | 13 |
| PFOS | 34 | 71% | 23 2024-12-11 | 7.85–9.03 | 8.8 | 10.7 | 15 | 21.3 |
| PFHpA | 34 | 62% | 8.6 2025-06-11 | 2.96–4.1 | 3.4 | 4.8 | 6.1 | 8.2 |
| PFBA | 34 | 32% | 8.1 2025-06-11 | 2.03–5.41 | <MRL | 5.4 | 6.9 | 7.6 |
| PFHxS | 34 | 21% | 5.5 2024-12-11 | 0.87–3.25 | <MRL | <MRL | 4 | 4.9 |
| lithium | 34 | 18% | 19.2 2025-06-11 | 2.75–10.16 | <MRL | <MRL | 14.9 | 18.7 |
| PFNA | 34 | 6% | 4.3 2025-06-11 | 0.24–4.01 | <MRL | <MRL | <MRL | 4 |
Never detected (20): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpS, PFMBA, PFMPA, PFPeS, PFTA, PFTrDA, PFUnA.
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.