- PWSID
- GA2950002
- State
- Georgia
- System type
- community water system (CWS)
- Population served
- 18,177
- City
- Lafayette
- Counties
- Walker County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2025-02-27 to 2025-12-01 · 5 entry point(s) · water types: GU;GW;SW
- Service-area boundary
- authoritative
PFOS ≥ 3 × its limit highest single result
PFOS ≥ 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
- Catoosa Util. Dist. Authority (GA0470000)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0.016 · detected: PFBA;PFBS - Walker County Water Authority (GA2950003)
Seller's highest results: PFOA 12 ppt · PFOS 22 ppt · HI 0.015 · detected: 6:2 FTS;PFBS;PFHpA;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) | 31 | 16.62 | 4 |
| PFOS (ppt) | 56 | 28.5 | 4 |
| Hazard Index | 0.542 | 0.254 | 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 2025-02-27 to 2025-12-01 · 5 entry point(s) · water types: GU;GW;SW · 18 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2025-02-27 | Big Springs Water Plant (GU) | SE1 | n/a | n/a | n/a | none |
| 2025-02-27 | Catoosa Utility District (GW) | SE1 | 5.1 | <4 | 0.017 | none |
| 2025-02-27 | Dixon Springs Water Plant (GW) | SE1 | <4 | <4 | 0.007 | none |
| 2025-02-27 | Lee School Road Plant (GU) | SE1 | <4 | <4 | 0.006 | none |
| 2025-02-27 | Walker County WA (SW) | SE1 | n/a | n/a | n/a | none |
| 2025-04-16 | Big Springs Water Plant (GU) | SE1 | 4.6 | <4 | 0.009 | none |
| 2025-04-16 | Walker County WA (SW) | SE1 | 31 | 56 | 0.542 | PFDA 3, PFHpA 7.6, PFHxA 8, PFPeA 9.2 |
| 2025-06-04 | Big Springs Water Plant (GU) | SE2 | 4.5 | <4 | 0.01 | none |
| 2025-06-04 | Lee School Road Plant (GU) | SE2 | <4 | <4 | 0.006 | none |
| 2025-06-04 | Walker County WA (SW) | SE2 | 24 | 48 | 0.451 | PFHpA 6.1, PFHxA 6.6, PFPeA 7.5 |
| 2025-09-15 | Big Springs Water Plant (GU) | SE3 | <4 | <4 | 0.011 | none |
| 2025-09-15 | Catoosa Utility District (GW) | SE2 | <4 | <4 | 0.01 | none |
| 2025-09-15 | Dixon Springs Water Plant (GW) | SE2 | <4 | <4 | 0.007 | none |
| 2025-09-15 | Lee School Road Plant (GU) | SE3 | <4 | <4 | 0.007 | none |
| 2025-09-15 | Walker County WA (SW) | SE3 | 4.3 | <4 | 0.009 | PFPeA 3.3 |
| 2025-12-01 | Big Springs Water Plant (GU) | SE4 | <4 | <4 | 0.011 | none |
| 2025-12-01 | Lee School Road Plant (GU) | SE4 | <4 | <4 | 0.009 | none |
| 2025-12-01 | Walker County WA (SW) | SE4 | 7.2 | 10 | 0.012 | PFHxA 3.6, PFPeA 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
480 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.
Big Springs Water Plant facility 03253 · sample point 302 · groundwater under the influence of surface water
| Compound | MRL | 2025-02-27 SE1 | 2025-04-16 SE1 | 2025-06-04 SE2 | 2025-09-15 SE3 | 2025-12-01 SE4 |
|---|---|---|---|---|---|---|
| PFBS | 3 ppt | – | 18 | 20 | 22 | 23 |
| PFOA | 4 ppt | – | 4.6 | 4.5 | < 4 | < 4 |
| 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 |
| 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 |
| 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 |
Catoosa Utility District facility 14633 · sample point 305 · groundwater
| Compound | MRL | 2025-02-27 SE1 | 2025-09-15 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | 34 | 20 |
| PFOA | 4 ppt | 5.1 | < 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 |
| 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 |
Dixon Springs Water Plant facility 1460009 · sample point 303 · groundwater
| Compound | MRL | 2025-02-27 SE1 | 2025-09-15 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | 14 | 15 |
| 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 |
Lee School Road Plant facility 03864 · sample point 306 · groundwater under the influence of surface water
| Compound | MRL | 2025-02-27 SE1 | 2025-06-04 SE2 | 2025-09-15 SE3 | 2025-12-01 SE4 |
|---|---|---|---|---|---|
| PFBS | 3 ppt | 13 | 13 | 15 | 17 |
| 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 |
| 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 |
Walker County WA facility 14632 · sample point 304 · surface water
| Compound | MRL | 2025-02-27 SE1 | 2025-04-16 SE1 | 2025-06-04 SE2 | 2025-09-15 SE3 | 2025-12-01 SE4 |
|---|---|---|---|---|---|---|
| PFBS | 3 ppt | – | 44 | 41 | 19 | 24 |
| PFDA | 3 ppt | – | 3 | < 3 | < 3 | < 3 |
| PFHpA | 3 ppt | – | 7.6 | 6.1 | < 3 | < 3 |
| PFHxA | 3 ppt | – | 8 | 6.6 | < 3 | 3.6 |
| PFHxS | 3 ppt | – | 5.2 | 4.3 | < 3 | < 3 |
| PFOA | 4 ppt | – | 31 | 24 | 4.3 | 7.2 |
| PFOS | 4 ppt | – | 56 | 48 | < 4 | 10 |
| PFPeA | 3 ppt | – | 9.2 | 7.5 | 3.3 | 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 |
| 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 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBS | 16 | 100% | 44 2025-04-16 | 22–22 | 19 | 23 | 41 | 44 |
| PFOA | 16 | 44% | 31 2025-04-16 | 5.04–7.29 | <MRL | 4.6 | 24 | 31 |
| PFPeA | 16 | 25% | 9.2 2025-04-16 | 1.56–3.81 | <MRL | <MRL | 7.5 | 9.2 |
| PFHxA | 16 | 19% | 8 2025-04-16 | 1.14–3.58 | <MRL | <MRL | 6.6 | 8 |
| PFOS | 16 | 19% | 56 2025-04-16 | 7.12–10.38 | <MRL | <MRL | 48 | 56 |
| PFHpA | 16 | 12% | 7.6 2025-04-16 | 0.86–3.48 | <MRL | <MRL | 6.1 | 7.6 |
| PFHxS | 16 | 12% | 5.2 2025-04-16 | 0.59–3.22 | <MRL | <MRL | 4.3 | 5.2 |
| PFDA | 16 | 6% | 3 2025-04-16 | 0.19–3 | <MRL | <MRL | <MRL | 3 |
Never detected (22): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFBA, 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.