- PWSID
- NY2902831
- State
- New York
- System type
- community water system (CWS)
- Population served
- 58,000
- City
- Syosset
- Counties
- Nassau County
- Primary source water
- groundwater
- UCMR 5 sampling
- 2023-04-25 to 2025-11-12 · 20 entry point(s) · water types: GW
- Service-area boundary
- authoritative
Other PFAS detected highest single result
Other PFAS detected worst entry-point average
Open on the New York map · All New York 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) | <MRL | 0 | 4 |
| PFOS (ppt) | <MRL | 0 | 4 |
| Hazard Index | 0 | 0 | 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 New York standards
| Highest single result | Worst entry-point average* | New York | |
|---|---|---|---|
| PFOA (ppt) | 0 | 0 | 10 |
| PFOS (ppt) | 0 | 0 | 10 |
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 2023-04-25 to 2025-11-12 · 20 entry point(s) · water types: GW · 49 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-04-25 | Well 27 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-25 | Well 28 (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-25 | Well 31 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-25 | Well 9 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-25 | Wells 29 & 30 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 11 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 12 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 13 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 14 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 17 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 18 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 19 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 23 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-04-28 | Well 3 Treatment (GW) | SE1 | <4 | <4 | 0 | 6:2 FTS 9.9 |
| 2023-04-28 | Well 4 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2023-07-10 | Well 16 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-07-10 | Well 6 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-07-18 | Well 13 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2023-09-01 | Well 14 Treatment (GW) | SE1 | <4 | <4 | 0 | PFHxA 3.4, PFPeA 5.3 |
| 2023-09-01 | Well 17 Treatment (GW) | SE1 | <4 | <4 | 0 | PFBA 7.6 |
| 2023-09-01 | Well 18 Treatment (GW) | SE1 | <4 | <4 | 0 | PFBA 56, PFHpA 3.8, PFHxA 14, PFPeA 31 |
| 2023-09-01 | Well 4 Treatment (GW) | SE1 | <4 | <4 | 0 | PFBA 17, PFPeA 3.9 |
| 2023-10-16 | Well 11 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-16 | Well 12 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-16 | Well 13 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-16 | Well 14 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 8.8 |
| 2023-10-16 | Well 17 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 5.9 |
| 2023-10-16 | Well 18 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 56, PFHpA 4.6, PFHxA 18, PFPeA 37 |
| 2023-10-16 | Well 19 Treatment (GW) | SE2 | <4 | <4 | 0 | PFHxA 3.9, PFPeA 5.7 |
| 2023-10-16 | Well 23 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 67, PFHxA 6.3, PFPeA 22 |
| 2023-10-16 | Well 3 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-16 | Well 9 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 5.9 |
| 2023-10-18 | Well 28 (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-18 | Well 31 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-10-18 | Well 4 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 20, PFPeA 4.4 |
| 2023-10-18 | Wells 29 & 30 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 6.4, PFHxA 4.5, PFPeA 5.4 |
| 2023-10-30 | Well 27 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-12-04 | Well 16 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2023-12-04 | Well 6 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2025-05-29 | Well 25 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2025-05-29 | Well 26 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2025-05-29 | Wells 20 & 21 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2025-06-24 | Well 25 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2025-06-24 | Well 26 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2025-06-24 | Wells 20 & 21 Treatment (GW) | SE1 | <4 | <4 | 0 | none |
| 2025-07-02 | Well 25 Treatment (GW) | SE1 | n/a | n/a | n/a | none |
| 2025-11-12 | Well 25 Treatment (GW) | SE2 | <4 | <4 | 0 | none |
| 2025-11-12 | Well 26 Treatment (GW) | SE2 | <4 | <4 | 0 | PFBA 26 |
| 2025-11-12 | Wells 20 & 21 Treatment (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
975 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.
Well 11 Treatment facility 05201 · sample point EPW11 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-10-16 SE2 |
|---|---|---|---|
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 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 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeA | 3 ppt | – | < 3 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Well 12 Treatment facility 06092 · sample point EPW12 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-10-16 SE2 |
|---|---|---|---|
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 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 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeA | 3 ppt | – | < 3 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Well 13 Treatment facility 06093 · sample point EPW13 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-07-18 SE1 | 2023-10-16 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 14 Treatment facility 06651 · sample point EPW14 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-09-01 SE1 | 2023-10-16 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | – | < 5 | 8.8 |
| PFHxA | 3 ppt | – | 3.4 | < 3 |
| PFPeA | 3 ppt | – | 5.3 | < 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 |
| 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 16 Treatment facility 07446 · sample point EPW16 · groundwater
| Compound | MRL | 2023-07-10 SE1 | 2023-12-04 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 17 Treatment facility 07593 · sample point EPW17 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-09-01 SE1 | 2023-10-16 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | – | 7.6 | 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 |
| 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 18 Treatment facility 07772 · sample point EPW18 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-09-01 SE1 | 2023-10-16 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | – | 56 | 56 |
| PFHpA | 3 ppt | – | 3.8 | 4.6 |
| PFHxA | 3 ppt | – | 14 | 18 |
| PFPeA | 3 ppt | – | 31 | 37 |
| 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 |
| 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 19 Treatment facility 07773 · sample point EPW19 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-10-16 SE2 |
|---|---|---|---|
| PFHxA | 3 ppt | – | 3.9 |
| PFPeA | 3 ppt | – | 5.7 |
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 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 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Well 23 Treatment facility 08043 · sample point EPW23 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-10-16 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | – | 67 |
| PFHxA | 3 ppt | – | 6.3 |
| PFPeA | 3 ppt | – | 22 |
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 |
| PFBS | 3 ppt | – | < 3 |
| PFDA | 3 ppt | – | < 3 |
| PFDoA | 3 ppt | – | < 3 |
| PFEESA | 3 ppt | – | < 3 |
| PFHpA | 3 ppt | – | < 3 |
| PFHpS | 3 ppt | – | < 3 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Well 25 Treatment facility 08355 · sample point EPW25 · groundwater
| Compound | MRL | 2025-05-29 SE1 | 2025-06-24 SE1 | 2025-07-02 SE1 | 2025-11-12 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 26 Treatment facility 13119 · sample point EPW26 · groundwater
| Compound | MRL | 2025-05-29 SE1 | 2025-06-24 SE1 | 2025-11-12 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | – | < 5 | 26 |
| 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 |
| 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 27 Treatment facility 08713 · sample point EPW27 · groundwater
| Compound | MRL | 2023-04-25 SE1 | 2023-10-30 SE2 |
|---|---|---|---|
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 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 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeA | 3 ppt | – | < 3 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Well 28 facility 14003 · sample point EPW28 · groundwater
| Compound | MRL | 2023-04-25 SE1 | 2023-10-18 SE2 |
|---|---|---|---|
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 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 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeA | 3 ppt | – | < 3 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Well 3 Treatment facility 00198 · sample point EPW3 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-10-16 SE2 |
|---|---|---|---|
| 6:2 FTS | 5 ppt | 9.9 | < 5 |
| 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 |
| 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 31 Treatment facility 13268 · sample point EPW31 · groundwater
| Compound | MRL | 2023-04-25 SE1 | 2023-10-18 SE2 |
|---|---|---|---|
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 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 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeA | 3 ppt | – | < 3 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Well 4 Treatment facility 12734 · sample point EPW4 · groundwater
| Compound | MRL | 2023-04-28 SE1 | 2023-09-01 SE1 | 2023-10-18 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | – | 17 | 20 |
| PFPeA | 3 ppt | – | 3.9 | 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 |
| 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 Treatment facility 03474 · sample point EPW6 · groundwater
| Compound | MRL | 2023-07-10 SE1 | 2023-12-04 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 9 Treatment facility 04245 · sample point EPW9 · groundwater
| Compound | MRL | 2023-04-25 SE1 | 2023-10-16 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | – | 5.9 |
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 |
| 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 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeA | 3 ppt | – | < 3 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Wells 20 & 21 Treatment facility 20021 · sample point E2021 · groundwater
| Compound | MRL | 2025-05-29 SE1 | 2025-06-24 SE1 | 2025-11-12 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 |
Wells 29 & 30 Treatment facility 11107 · sample point E2930 · groundwater
| Compound | MRL | 2023-04-25 SE1 | 2023-10-18 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | – | 6.4 |
| PFHxA | 3 ppt | – | 4.5 |
| PFPeA | 3 ppt | – | 5.4 |
| 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 | < 5 |
| NFDHA | 20 ppt | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 |
| PFBS | 3 ppt | – | < 3 |
| PFDA | 3 ppt | – | < 3 |
| PFDoA | 3 ppt | – | < 3 |
| PFEESA | 3 ppt | – | < 3 |
| PFHpA | 3 ppt | – | < 3 |
| PFHpS | 3 ppt | – | < 3 |
| PFHxS | 3 ppt | – | < 3 |
| PFMBA | 3 ppt | – | < 3 |
| PFMPA | 4 ppt | – | < 4 |
| PFNA | 4 ppt | – | < 4 |
| PFOA | 4 ppt | – | < 4 |
| PFOS | 4 ppt | – | < 4 |
| PFPeS | 4 ppt | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBA | 31 | 36% | 67 2023-10-16 | 8.92–12.15 | <MRL | 7.6 | 26 | 56 |
| PFPeA | 31 | 26% | 37 2023-10-16 | 3.7–5.93 | <MRL | 3.9 | 5.7 | 31 |
| PFHxA | 31 | 19% | 18 2023-10-16 | 1.62–4.04 | <MRL | <MRL | 4.5 | 14 |
| PFHpA | 31 | 6% | 4.6 2023-10-16 | 0.27–3.08 | <MRL | <MRL | <MRL | 3.8 |
| 6:2 FTS | 31 | 3% | 9.9 2023-04-28 | 0.32–5.16 | <MRL | <MRL | <MRL | <MRL |
Never detected (25): 11Cl-PF3OUdS, 4:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFBS, PFDA, PFDoA, PFEESA, PFHpS, PFHxS, PFMBA, PFMPA, PFNA, PFOA, 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 2023-01-03 to 2026-06-17; 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 171ad949e257 · 2026-10-18T04:10Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.