- PWSID
- GA2130000
- State
- Georgia
- System type
- community water system (CWS)
- Population served
- 28,262
- City
- Chatsworth
- Counties
- Murray County
- Primary source water
- surface water
- UCMR 5 sampling
- 2025-01-15 to 2025-09-23 · 6 entry point(s) · water types: GU;GW;SW
- Service-area boundary
- EPA-modeled (Random Forest) — approximate: estimated by EPA with a statistical model, not a surveyed service area
PFOA ≥ 3 × its limit highest single result
PFOS 1–3 × its limit worst entry-point average
Open on the Georgia map · All Georgia 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
- Calhoun (GA1290000)
Seller's highest results: PFOA 29 ppt · PFOS 29 ppt · HI 0.729 · detected: PFBA;PFBS;PFHpA;PFHxA;PFHxS;PFOA;PFOS;PFPeA - Ocoee Utility District (TN0000525)
Seller's highest results: PFOA 6 ppt · PFOS 4.5 ppt · HI 0.313 · detected: PFBS;PFHxA;PFHxS;PFOA;PFOS;PFPeA - Dalton Utilities (GA3130000)
Seller's highest results: PFOA 8.4 ppt · PFOS 8.4 ppt · HI 0.017 · detected: PFBA;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) | 15 | 6.85 | 4 |
| PFOS (ppt) | 12 | 7.05 | 4 |
| Hazard Index | 0.341 | 0.108 | 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).
Sampling history
Sampled 2025-01-15 to 2025-09-23 · 6 entry point(s) · water types: GU;GW;SW · 27 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2025-01-15 | Calhoun (SW) | SE1 | 8.8 | 5.8 | 0.036 | PFBA 5.4, PFHxA 6, PFPeA 9.5 |
| 2025-01-15 | Carters Lake Water Plant (SW) | SE1 | <4 | <4 | 0.003 | PFHxA 3.6 |
| 2025-01-15 | Dalton Utilities #1 (SW) | SE1 | 4.5 | 4.4 | 0.018 | PFHxA 4.1, PFPeA 5.9 |
| 2025-01-15 | Eton Spring Plant (GU) | SE1 | 7.8 | 6.2 | 0.029 | PFHpA 3.1, PFHxA 4.8, PFPeA 5.4 |
| 2025-01-15 | Nix Spring Plant (GW) | SE1 | <4 | <4 | 0 | none |
| 2025-01-15 | Ocoee Utilities (SW) | SE1 | <4 | <4 | 0 | PFBA 7.6 |
| 2025-04-15 | Calhoun (SW) | SE2 | <4 | <4 | 0.003 | PFPeA 3.2 |
| 2025-04-15 | Carters Lake Water Plant (SW) | SE2 | <4 | <4 | 0.002 | none |
| 2025-04-15 | Dalton Utilities #1 (SW) | SE2 | <4 | 5.3 | 0.011 | PFHxA 3.4, PFPeA 4.8 |
| 2025-04-15 | Eton Spring Plant (GU) | SE2 | 5.2 | 5.4 | 0.029 | PFHxA 3.6, PFPeA 4.2 |
| 2025-04-15 | Ocoee Utilities (SW) | SE2 | <4 | <4 | 0.002 | PFBA 6.3 |
| 2025-07-01 | Calhoun (SW) | SE3 | 15 | 8.9 | 0.022 | PFBA 7.8, PFHpA 4.2, PFHxA 7, PFPeA 14 |
| 2025-07-01 | Carters Lake Water Plant (SW) | SE3 | <4 | <4 | 0.003 | none |
| 2025-07-01 | Dalton Utilities #1 (SW) | SE3 | 5.3 | 6.5 | 0.013 | PFHxA 3.6, PFPeA 5.3 |
| 2025-07-01 | Eton Spring Plant (GU) | SE3 | 4.7 | 5.1 | 0.033 | PFHxA 3.4, PFPeA 4.4 |
| 2025-07-01 | Nix Spring Plant (GW) | SE2 | <4 | <4 | 0 | none |
| 2025-07-01 | Ocoee Utilities (SW) | SE3 | <4 | <4 | 0 | PFBA 13 |
| 2025-07-21 | Calhoun (SW) | SE3 | n/a | n/a | n/a | none |
| 2025-07-21 | Carters Lake Water Plant (SW) | SE3 | n/a | n/a | n/a | none |
| 2025-07-21 | Dalton Utilities #1 (SW) | SE3 | n/a | n/a | n/a | none |
| 2025-07-21 | Nix Spring Plant (GW) | SE2 | n/a | n/a | n/a | none |
| 2025-07-21 | Ocoee Utilities (SW) | SE3 | n/a | n/a | n/a | none |
| 2025-09-23 | Calhoun (SW) | SE4 | <4 | <4 | 0.005 | none |
| 2025-09-23 | Carters Lake Water Plant (SW) | SE4 | <4 | <4 | 0.004 | PFHxA 4.2 |
| 2025-09-23 | Dalton Utilities #1 (SW) | SE4 | 10 | 12 | 0.017 | PFHpA 4, PFHxA 7.8, PFPeA 11 |
| 2025-09-23 | Eton Spring Plant (GU) | SE4 | 9.7 | 8.2 | 0.341 | PFHpA 3.5, PFHxA 5.3, PFPeA 6.5 |
| 2025-09-23 | Ocoee Utilities (SW) | SE4 | <4 | <4 | 0.003 | 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
660 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.
Calhoun facility 18510 · sample point 307 · surface water
| Compound | MRL | 2025-01-15 SE1 | 2025-04-15 SE2 | 2025-07-01 SE3 | 2025-07-21 SE3 | 2025-09-23 SE4 |
|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 5.4 | < 5 | 7.8 | – | < 5 |
| PFBS | 3 ppt | 72 | 5.6 | 45 | – | 11 |
| PFHpA | 3 ppt | < 3 | < 3 | 4.2 | – | < 3 |
| PFHxA | 3 ppt | 6 | < 3 | 7 | – | < 3 |
| PFOA | 4 ppt | 8.8 | < 4 | 15 | – | < 4 |
| PFOS | 4 ppt | 5.8 | < 4 | 8.9 | – | < 4 |
| PFPeA | 3 ppt | 9.5 | 3.2 | 14 | – | < 3 |
| 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 |
| PFDA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFEESA | 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 |
| 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 |
Carters Lake Water Plant facility 03802 · sample point 305 · surface water
| Compound | MRL | 2025-01-15 SE1 | 2025-04-15 SE2 | 2025-07-01 SE3 | 2025-07-21 SE3 | 2025-09-23 SE4 |
|---|---|---|---|---|---|---|
| PFBS | 3 ppt | 5.9 | 4.6 | 6.1 | – | 7 |
| PFHxA | 3 ppt | 3.6 | < 3 | < 3 | – | 4.2 |
| 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 |
| 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 |
| 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 |
Dalton Utilities #1 facility 22354 · sample point 308 · surface water
| Compound | MRL | 2025-01-15 SE1 | 2025-04-15 SE2 | 2025-07-01 SE3 | 2025-07-21 SE3 | 2025-09-23 SE4 |
|---|---|---|---|---|---|---|
| PFBS | 3 ppt | 35 | 23 | 26 | – | 34 |
| PFHpA | 3 ppt | < 3 | < 3 | < 3 | – | 4 |
| PFHxA | 3 ppt | 4.1 | 3.4 | 3.6 | – | 7.8 |
| PFOA | 4 ppt | 4.5 | < 4 | 5.3 | – | 10 |
| PFOS | 4 ppt | 4.4 | 5.3 | 6.5 | – | 12 |
| PFPeA | 3 ppt | 5.9 | 4.8 | 5.3 | – | 11 |
| 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 |
| PFDA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 | < 3 | – | < 3 |
| PFEESA | 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 |
| 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 |
Eton Spring Plant facility 03058 · sample point 302 · groundwater under the influence of surface water
| Compound | MRL | 2025-01-15 SE1 | 2025-04-15 SE2 | 2025-07-01 SE3 | 2025-09-23 SE4 |
|---|---|---|---|---|---|
| PFBS | 3 ppt | 58 | 57 | 66 | 81 |
| PFHpA | 3 ppt | 3.1 | < 3 | < 3 | 3.5 |
| PFHxA | 3 ppt | 4.8 | 3.6 | 3.4 | 5.3 |
| PFHxS | 3 ppt | < 3 | < 3 | < 3 | 3 |
| PFOA | 4 ppt | 7.8 | 5.2 | 4.7 | 9.7 |
| PFOS | 4 ppt | 6.2 | 5.4 | 5.1 | 8.2 |
| PFPeA | 3 ppt | 5.4 | 4.2 | 4.4 | 6.5 |
| 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 |
| PFDA | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| PFEESA | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| PFHpS | 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 |
| 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 |
Nix Spring Plant facility 03701 · sample point 304 · groundwater
| Compound | MRL | 2025-01-15 SE1 | 2025-07-01 SE2 | 2025-07-21 SE2 |
|---|---|---|---|---|
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | < 3 | < 3 | – |
| 6:2 FTS | 5 ppt | < 5 | < 5 | – |
| 8:2 FTS | 5 ppt | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 | – |
| ADONA | 3 ppt | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – |
| NFDHA | 20 ppt | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – |
| PFBA | 5 ppt | < 5 | < 5 | – |
| PFBS | 3 ppt | < 3 | < 3 | – |
| PFDA | 3 ppt | < 3 | < 3 | – |
| PFDoA | 3 ppt | < 3 | < 3 | – |
| PFEESA | 3 ppt | < 3 | < 3 | – |
| PFHpA | 3 ppt | < 3 | < 3 | – |
| PFHpS | 3 ppt | < 3 | < 3 | – |
| PFHxA | 3 ppt | < 3 | < 3 | – |
| PFHxS | 3 ppt | < 3 | < 3 | – |
| PFMBA | 3 ppt | < 3 | < 3 | – |
| PFMPA | 4 ppt | < 4 | < 4 | – |
| PFNA | 4 ppt | < 4 | < 4 | – |
| PFOA | 4 ppt | < 4 | < 4 | – |
| PFOS | 4 ppt | < 4 | < 4 | – |
| PFPeA | 3 ppt | < 3 | < 3 | – |
| PFPeS | 4 ppt | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | – |
| PFUnA | 2 ppt | < 2 | < 2 | – |
| lithium | 9 µg/L | < 9 | – | < 9 |
Ocoee Utilities facility 23124 · sample point 309 · surface water
| Compound | MRL | 2025-01-15 SE1 | 2025-04-15 SE2 | 2025-07-01 SE3 | 2025-07-21 SE3 | 2025-09-23 SE4 |
|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 7.6 | 6.3 | 13 | – | < 5 |
| PFBS | 3 ppt | < 3 | 3.7 | < 3 | – | 5.5 |
| 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 |
| 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 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBS | 22 | 82% | 81 2025-09-23 | 24.84–25.38 | 7 | 45 | 66 | 72 |
| PFHxA | 22 | 54% | 7.8 2025-09-23 | 2.58–3.95 | 3.4 | 4.2 | 6 | 7 |
| PFPeA | 22 | 50% | 14 2025-07-01 | 3.37–4.87 | <MRL | 5.4 | 9.5 | 11 |
| PFOS | 22 | 46% | 12 2025-09-23 | 3.08–5.26 | <MRL | 5.8 | 8.2 | 8.9 |
| PFOA | 22 | 41% | 15 2025-07-01 | 3.23–5.59 | <MRL | 5.3 | 9.7 | 10 |
| PFBA | 22 | 23% | 13 2025-07-01 | 1.82–5.69 | <MRL | <MRL | 7.6 | 7.8 |
| PFHpA | 22 | 18% | 4.2 2025-07-01 | 0.67–3.13 | <MRL | <MRL | 3.5 | 4 |
| PFHxS | 22 | 4% | 3 2025-09-23 | 0.14–3 | <MRL | <MRL | <MRL | <MRL |
Never detected (22): 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, PFNA, 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 2023-01-09 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 e0e919e2a26a · 2026-10-18T04:09Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.