- PWSID
- AL0001164
- State
- Alabama
- System type
- community water system (CWS)
- Population served
- 3,252
- City
- Sterrett
- Counties
- Shelby County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2024-01-08 to 2024-10-07 · 2 entry point(s) · water types: GW;SW
- Service-area boundary
- EPA-modeled (Decision Tree) — approximate: estimated by EPA with a statistical model, not a surveyed service area
PFOS ≥ 3 × its limit highest single result
PFOS ≥ 3 × its limit worst entry-point average
Open on the Alabama map · All Alabama 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
- Vincent, The Wwb Of The City Of (AL0001168)
Seller not monitored under UCMR 5. - New London Water & Fp Authority (AL0001437)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0 - Shelby County Commission-Water Services (AL0001671)
Seller's highest results: PFOA 26.1 ppt · PFOS 27.7 ppt · HI 0.39 · detected: PFBA;PFBS;PFHpA;PFHxA;PFHxS;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) | 21 | 15.75 | 4 |
| PFOS (ppt) | 31 | 19.23 | 4 |
| Hazard Index | 0.055 | 0.042 | 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 Alabama 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 2024-01-08 to 2024-10-07 · 2 entry point(s) · water types: GW;SW · 8 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2024-01-08 | New London connection (GW) | SE1 | <4 | <4 | 0 | none |
| 2024-01-08 | Shelby County connection (SW) | SE1 | 12 | 9.9 | 0.029 | PFBA 10, PFHpA 5.7, PFHxA 16, PFPeA 31 |
| 2024-04-09 | Shelby County connection (SW) | SE2 | 12 | 13 | 0.037 | PFBA 9.3, PFHpA 5.8, PFHxA 18, PFPeA 31 |
| 2024-07-10 | New London connection (GW) | SE2 | n/a | n/a | n/a | none |
| 2024-07-10 | Shelby County connection (SW) | SE3 | n/a | n/a | n/a | none |
| 2024-08-12 | Shelby County connection (SW) | SE3 | 18 | 31 | 0.045 | PFBA 14, PFHpA 8.2, PFHxA 21, PFPeA 32 |
| 2024-09-11 | New London connection (GW) | SE2 | <4 | <4 | 0 | none |
| 2024-10-07 | Shelby County connection (SW) | SE4 | 21 | 23 | 0.055 | PFBA 12, PFHpA 9, PFHxA 23, PFPeA 33 |
“<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
180 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.
New London connection facility 10002 · sample point EP002 · groundwater
| Compound | MRL | 2024-01-08 SE1 | 2024-07-10 SE2 | 2024-09-11 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 | – |
Shelby County connection facility 10001 · sample point EP001 · surface water
| Compound | MRL | 2024-01-08 SE1 | 2024-04-09 SE2 | 2024-07-10 SE3 | 2024-08-12 SE3 | 2024-10-07 SE4 |
|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 10 | 9.3 | – | 14 | 12 |
| PFBS | 3 ppt | 59 | 75 | – | 91 | 110 |
| PFHpA | 3 ppt | 5.7 | 5.8 | – | 8.2 | 9 |
| PFHxA | 3 ppt | 16 | 18 | – | 21 | 23 |
| PFOA | 4 ppt | 12 | 12 | – | 18 | 21 |
| PFOS | 4 ppt | 9.9 | 13 | – | 31 | 23 |
| PFPeA | 3 ppt | 31 | 31 | – | 32 | 33 |
| 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 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBA | 6 | 67% | 14 2024-08-12 | 7.55–9.22 | 9.3 | 12 | 14 | 14 |
| PFBS | 6 | 67% | 110 2024-10-07 | 55.83–56.83 | 59 | 91 | 110 | 110 |
| PFHpA | 6 | 67% | 9 2024-10-07 | 4.78–5.78 | 5.7 | 8.2 | 9 | 9 |
| PFHxA | 6 | 67% | 23 2024-10-07 | 13–14 | 16 | 21 | 23 | 23 |
| PFOA | 6 | 67% | 21 2024-10-07 | 10.5–11.83 | 12 | 18 | 21 | 21 |
| PFOS | 6 | 67% | 31 2024-08-12 | 12.82–14.15 | 9.9 | 23 | 31 | 31 |
| PFPeA | 6 | 67% | 33 2024-10-07 | 21.17–22.17 | 31 | 32 | 33 | 33 |
Never detected (23): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpS, PFHxS, 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 2026-04-01; 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 fc6f98c02177 · 2026-10-18T04:09Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.