- PWSID
- MS0360011
- State
- Mississippi
- System type
- community water system (CWS)
- Population served
- 28,500
- City
- Oxford
- Counties
- Lafayette County
- Primary source water
- groundwater
- UCMR 5 sampling
- 2025-03-03 to 2025-09-22 · 5 entry point(s) · water types: GW
- Service-area boundary
- authoritative
PFOS ≥ 3 × its limit highest single result
PFOS ≥ 3 × its limit worst entry-point average
Open on the Mississippi map · All Mississippi 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) | 4.4 | 4.35 | 4 |
| PFOS (ppt) | 72.2 | 52.95 | 4 |
| Hazard Index | 1.362 | 1.032 | 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 Mississippi 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 2025-03-03 to 2025-09-22 · 5 entry point(s) · water types: GW · 15 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2025-03-03 | Anderson Road TP (GW) | SE1 | <4 | 72.2 | 1.362 | PFHxA 3.8, PFPeA 3.9 |
| 2025-03-03 | Bramlett Blvd. TP (GW) | SE1 | 4.4 | <4 | 0.005 | PFHxA 3.3, PFPeA 3.1 |
| 2025-03-03 | Industrial Park Plant (GW) | SE1 | <4 | <4 | 0 | none |
| 2025-03-03 | McElroy Drive TP (GW) | SE1 | <4 | <4 | 0.332 | 6:2 FTS 22.9, PFBA 5.6, PFHpA 3, PFHxA 15, PFPeA 24.5 |
| 2025-03-03 | Whirlpool Plant (GW) | SE1 | <4 | <4 | 0 | none |
| 2025-09-09 | Anderson Road TP (GW) | SE2 | n/a | n/a | n/a | none |
| 2025-09-09 | Bramlett Blvd. TP (GW) | SE2 | n/a | n/a | n/a | none |
| 2025-09-09 | Industrial Park Plant (GW) | SE2 | n/a | n/a | n/a | none |
| 2025-09-09 | McElroy Drive TP (GW) | SE2 | n/a | n/a | n/a | none |
| 2025-09-09 | Whirlpool Plant (GW) | SE2 | n/a | n/a | n/a | none |
| 2025-09-22 | Anderson Road TP (GW) | SE2 | <4 | 33.7 | 0.702 | none |
| 2025-09-22 | Bramlett Blvd. TP (GW) | SE2 | 4.3 | <4 | 0.005 | PFHxA 3.4, PFPeA 3 |
| 2025-09-22 | Industrial Park Plant (GW) | SE2 | <4 | <4 | 0 | none |
| 2025-09-22 | McElroy Drive TP (GW) | SE2 | <4 | <4 | 0.352 | 6:2 FTS 18.5, PFBA 5.6, PFHpA 3.4, PFHxA 14.2, PFPeA 23.7 |
| 2025-09-22 | Whirlpool Plant (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
300 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.
Anderson Road TP facility 31362 · sample point 31362 · groundwater
| Compound | MRL | 2025-03-03 SE1 | 2025-09-09 SE2 | 2025-09-22 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | 4.7 | – | 3.9 |
| PFHxA | 3 ppt | 3.8 | – | < 3 |
| PFHxS | 3 ppt | 13.6 | – | 7 |
| PFOS | 4 ppt | 72.2 | – | 33.7 |
| PFPeA | 3 ppt | 3.9 | – | < 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 |
| 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 |
| PFMBA | 3 ppt | < 3 | – | < 3 |
| PFMPA | 4 ppt | < 4 | – | < 4 |
| PFNA | 4 ppt | < 4 | – | < 4 |
| PFOA | 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 | – |
Bramlett Blvd. TP facility 31361 · sample point 31361 · groundwater
| Compound | MRL | 2025-03-03 SE1 | 2025-09-09 SE2 | 2025-09-22 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | 10.4 | – | 10.9 |
| PFHxA | 3 ppt | 3.3 | – | 3.4 |
| PFOA | 4 ppt | 4.4 | – | 4.3 |
| PFPeA | 3 ppt | 3.1 | – | 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 |
| 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 | < 9 | < 9 | – |
Industrial Park Plant facility 31378 · sample point 31378 · groundwater
| Compound | MRL | 2025-03-03 SE1 | 2025-09-09 SE2 | 2025-09-22 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 | – |
McElroy Drive TP facility 31363 · sample point 31363 · groundwater
| Compound | MRL | 2025-03-03 SE1 | 2025-09-09 SE2 | 2025-09-22 SE2 |
|---|---|---|---|---|
| 6:2 FTS | 5 ppt | 22.9 | – | 18.5 |
| PFBA | 5 ppt | 5.6 | – | 5.6 |
| PFBS | 3 ppt | 4.2 | – | 4.7 |
| PFHpA | 3 ppt | 3 | – | 3.4 |
| PFHxA | 3 ppt | 15 | – | 14.2 |
| PFHxS | 3 ppt | 3.3 | – | 3.5 |
| PFPeA | 3 ppt | 24.5 | – | 23.7 |
| 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 |
| 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 | – |
Whirlpool Plant facility 42768 · sample point 42768 · groundwater
| Compound | MRL | 2025-03-03 SE1 | 2025-09-09 SE2 | 2025-09-22 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 | – |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBS | 10 | 60% | 10.9 2025-09-22 | 3.88–5.08 | 3.9 | 4.7 | 10.4 | 10.9 |
| PFHxA | 10 | 50% | 15 2025-03-03 | 3.97–5.47 | <MRL | 3.8 | 14.2 | 15 |
| PFPeA | 10 | 50% | 24.5 2025-03-03 | 5.82–7.32 | <MRL | 3.9 | 23.7 | 24.5 |
| PFHxS | 10 | 40% | 13.6 2025-03-03 | 2.74–4.54 | <MRL | 3.5 | 7 | 13.6 |
| 6:2 FTS | 10 | 20% | 22.9 2025-03-03 | 4.14–8.14 | <MRL | <MRL | 18.5 | 22.9 |
| PFBA | 10 | 20% | 5.6 2025-03-03 | 1.12–5.12 | <MRL | <MRL | 5.6 | 5.6 |
| PFHpA | 10 | 20% | 3.4 2025-09-22 | 0.64–3.04 | <MRL | <MRL | 3 | 3.4 |
| PFOA | 10 | 20% | 4.4 2025-03-03 | 0.87–4.07 | <MRL | <MRL | 4.3 | 4.4 |
| PFOS | 10 | 20% | 72.2 2025-03-03 | 10.59–13.79 | <MRL | <MRL | 33.7 | 72.2 |
Never detected (21): 11Cl-PF3OUdS, 4:2 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 2023-01-23 to 2026-03-18; 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 159b8c2ccdd2 · 2026-10-18T04:08Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.