- PWSID
- KS2000911
- State
- Kansas
- System type
- community water system (CWS)
- Population served
- 14,580
- City
- Great Bend
- Counties
- Barton County
- Primary source water
- groundwater
- UCMR 5 sampling
- 2023-10-11 to 2024-05-13 · 10 entry point(s) · water types: GW
- Service-area boundary
- authoritative
Hazard Index ≥ 3 × its limit highest single result
Hazard Index ≥ 3 × its limit worst entry-point average
Open on the Kansas map · All Kansas 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) | 5.2 | 2.6 | 4 |
| PFOS (ppt) | 11 | 8 | 4 |
| Hazard Index | 6.005 | 4.404 | 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 Kansas PFAS drinking-water standard in effect or proposed as of 2026-10-17: No state PFAS drinking-water standard; follows federal NPDWR (BCLP state survey, Jan 2026).
Sampling history
Sampled 2023-10-11 to 2024-05-13 · 10 entry point(s) · water types: GW · 21 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-10-11 | 24th St. #6 (GW) | SE1 | <4 | <4 | 0 | lithium 34.8 µg/L |
| 2023-10-11 | Crescent Park #5 (GW) | SE1 | 5.2 | 11 | 6.005 | 6:2 FTS 10, PFBA 25, PFHpA 13, PFHxA 69, PFPeA 110, PFPeS 18, lithium 28.8 µg/L |
| 2023-10-11 | Harrison #4 (GW) | SE1 | n/a | n/a | n/a | lithium 31.3 µg/L |
| 2023-10-11 | McKinley #9 (GW) | SE1 | <4 | <4 | 0.48 | lithium 25.7 µg/L |
| 2023-10-11 | Odell #10 (GW) | SE1 | <4 | <4 | 0 | lithium 21.3 µg/L |
| 2023-10-11 | Office Well #2 (GW) | SE1 | <4 | <4 | 0 | lithium 26.7 µg/L |
| 2023-10-11 | Patton Rd. #8 (GW) | SE1 | <4 | <4 | 0.43 | lithium 21.8 µg/L |
| 2023-10-11 | Well #11 (GW) | SE1 | <4 | <4 | 0 | lithium 20.7 µg/L |
| 2023-10-11 | Well #12 (GW) | SE1 | <4 | <4 | 0.31 | lithium 18 µg/L |
| 2023-10-12 | Kansas #3 (GW) | SE1 | <4 | <4 | 0 | lithium 21.8 µg/L |
| 2023-12-26 | Harrison #4 (GW) | SE1 | <4 | <4 | 1.102 | none |
| 2024-04-16 | 24th St. #6 (GW) | SE2 | <4 | <4 | 0 | lithium 41.5 µg/L |
| 2024-04-16 | Crescent Park #5 (GW) | SE2 | <4 | 5 | 2.803 | 6:2 FTS 5.2, PFBA 9.7, PFHpA 5, PFHxA 25, PFPeA 39, PFPeS 6.8, lithium 33.5 µg/L |
| 2024-04-16 | Well #11 (GW) | SE2 | <4 | <4 | 0 | lithium 26 µg/L |
| 2024-04-17 | Kansas #3 (GW) | SE2 | <4 | <4 | 0 | lithium 22.4 µg/L |
| 2024-04-17 | McKinley #9 (GW) | SE2 | <4 | 4.9 | 2.603 | 6:2 FTS 5.1, PFBA 9, PFHpA 4.6, PFHxA 23, PFPeA 36, PFPeS 6, lithium 31.5 µg/L |
| 2024-04-17 | Odell #10 (GW) | SE2 | <4 | <4 | 0 | lithium 24.8 µg/L |
| 2024-04-17 | Patton Rd. #8 (GW) | SE2 | <4 | 4.7 | 2.302 | PFBA 7.8, PFHpA 4, PFHxA 20, PFPeA 31, PFPeS 5.3, lithium 31.4 µg/L |
| 2024-04-18 | Harrison #4 (GW) | SE2 | <4 | <4 | 0.992 | lithium 31.2 µg/L |
| 2024-04-18 | Well #12 (GW) | SE2 | <4 | <4 | 0.33 | lithium 20 µg/L |
| 2024-05-13 | Office Well #2 (GW) | SE2 | <4 | <4 | 0 | lithium 25.2 µg/L |
“<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
600 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.
24th St. #6 facility 00008 · sample point 00120386 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-04-16 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 | 34.8 | 41.5 |
Crescent Park #5 facility 00006 · sample point 00120362 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-04-16 SE2 |
|---|---|---|---|
| 6:2 FTS | 5 ppt | 10 | 5.2 |
| PFBA | 5 ppt | 25 | 9.7 |
| PFBS | 3 ppt | 11 | 5.3 |
| PFHpA | 3 ppt | 13 | 5 |
| PFHxA | 3 ppt | 69 | 25 |
| PFHxS | 3 ppt | 60 | 28 |
| PFOA | 4 ppt | 5.2 | < 4 |
| PFOS | 4 ppt | 11 | 5 |
| PFPeA | 3 ppt | 110 | 39 |
| PFPeS | 4 ppt | 18 | 6.8 |
| 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 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 28.8 | 33.5 |
Harrison #4 facility 00001 · sample point 00120317 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2023-12-26 SE1 | 2024-04-18 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | – | 3.5 | 3.4 |
| PFHxS | 3 ppt | – | 11 | 9.9 |
| 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 |
| 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 | 31.3 | – | 31.2 |
Kansas #3 facility 00003 · sample point 00120331 · groundwater
| Compound | MRL | 2023-10-12 SE1 | 2024-04-17 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 | 21.8 | 22.4 |
McKinley #9 facility 00007 · sample point 00120379 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-04-17 SE2 |
|---|---|---|---|
| 6:2 FTS | 5 ppt | < 5 | 5.1 |
| PFBA | 5 ppt | < 5 | 9 |
| PFBS | 3 ppt | < 3 | 5 |
| PFHpA | 3 ppt | < 3 | 4.6 |
| PFHxA | 3 ppt | < 3 | 23 |
| PFHxS | 3 ppt | 4.8 | 26 |
| PFOS | 4 ppt | < 4 | 4.9 |
| PFPeA | 3 ppt | < 3 | 36 |
| PFPeS | 4 ppt | < 4 | 6 |
| 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 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 25.7 | 31.5 |
Odell #10 facility 00009 · sample point 00120393 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-04-17 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 | 21.3 | 24.8 |
Office Well #2 facility 00002 · sample point 00120324 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-05-13 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 | 26.7 | 25.2 |
Patton Rd. #8 facility 00004 · sample point 00120348 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-04-17 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | < 5 | 7.8 |
| PFBS | 3 ppt | < 3 | 4.6 |
| PFHpA | 3 ppt | < 3 | 4 |
| PFHxA | 3 ppt | < 3 | 20 |
| PFHxS | 3 ppt | 4.3 | 23 |
| PFOS | 4 ppt | < 4 | 4.7 |
| PFPeA | 3 ppt | < 3 | 31 |
| 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 |
| 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 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 21.8 | 31.4 |
Well #11 facility 00010 · sample point 00120409 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-04-16 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 | 20.7 | 26 |
Well #12 facility 00005 · sample point 00120355 · groundwater
| Compound | MRL | 2023-10-11 SE1 | 2024-04-18 SE2 |
|---|---|---|---|
| PFHxS | 3 ppt | 3.1 | 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 | 18 | 20 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| lithium | 20 | 100% | 41.5 2024-04-16 | 26.92–26.92 | 25.7 | 31.3 | 33.5 | 34.8 |
| PFHxS | 20 | 50% | 60 2023-10-11 | 8.67–10.17 | <MRL | 9.9 | 26 | 28 |
| PFBS | 20 | 30% | 11 2023-10-11 | 1.64–3.74 | <MRL | 3.4 | 5 | 5.3 |
| PFBA | 20 | 20% | 25 2023-10-11 | 2.58–6.58 | <MRL | <MRL | 9 | 9.7 |
| PFHpA | 20 | 20% | 13 2023-10-11 | 1.33–3.73 | <MRL | <MRL | 4.6 | 5 |
| PFHxA | 20 | 20% | 69 2023-10-11 | 6.85–9.25 | <MRL | <MRL | 23 | 25 |
| PFOS | 20 | 20% | 11 2023-10-11 | 1.28–4.48 | <MRL | <MRL | 4.9 | 5 |
| PFPeA | 20 | 20% | 110 2023-10-11 | 10.8–13.2 | <MRL | <MRL | 36 | 39 |
| PFPeS | 20 | 20% | 18 2023-10-11 | 1.8–5 | <MRL | <MRL | 6 | 6.8 |
| 6:2 FTS | 20 | 15% | 10 2023-10-11 | 1.01–5.26 | <MRL | <MRL | 5.1 | 5.2 |
| PFOA | 20 | 5% | 5.2 2023-10-11 | 0.26–4.06 | <MRL | <MRL | <MRL | <MRL |
Never detected (19): 11Cl-PF3OUdS, 4:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpS, PFMBA, PFMPA, PFNA, 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 2023-01-06 to 2026-05-19; 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 e05f879c10ec · 2026-10-18T04:05Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.