- PWSID
- PA1230012
- State
- Pennsylvania
- System type
- community water system (CWS)
- Population served
- 7,809
- City
- Harrisburg
- Counties
- Delaware County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2025-01-21 to 2025-10-20 · 4 entry point(s) · water types: SW
- Service-area boundary
- authoritative
PFOA ≥ 3 × its limit highest single result
PFOA 1–3 × its limit worst entry-point average
Open on the Pennsylvania map · All Pennsylvania 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
- Chester Water Authority (PA1230004)
Seller's highest results: PFOA 5.1 ppt · PFOS <MRL · HI 0.002 · detected: PFBS;PFHxA;PFOA;PFPeA - Veolia Water Delaware, Inc (DE0000564)
Seller's highest results: PFOA 24.4 ppt · PFOS <MRL · HI 1.162 · detected: PFBA;PFBS;PFDA;PFHpA;PFHxA;PFNA;PFOA;PFPeA;PFUnA
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) | 22.3 | 9.75 | 4 |
| PFOS (ppt) | <MRL | 0 | 4 |
| Hazard Index | 0.972 | 0.43 | 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).
Compared with Pennsylvania standards
| Highest single result | Worst entry-point average* | Pennsylvania | |
|---|---|---|---|
| PFOA (ppt) | 22.3 | 9.75 | 14 |
| PFOS (ppt) | 0 | 0 | 18 |
Sum standards add the listed compounds within each sample (non-detects = 0). State compliance is normally judged on averages over time; these are screening comparisons.
Sampling history
Sampled 2025-01-21 to 2025-10-20 · 4 entry point(s) · water types: SW · 16 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2025-01-21 | CWA SMITHBRIDGE (SW) | SE1 | <4 | <4 | 0.002 | PFHxA 3, PFPeA 3.1 |
| 2025-01-21 | SUEZ MARSH (SW) | SE1 | 22.3 | <4 | 0.972 | PFBA 29.6, PFHpA 21.8, PFHxA 24.7, PFPeA 24.2 |
| 2025-01-21 | SUEZ SHARON (SW) | SE1 | 16 | <4 | 0.662 | PFBA 21.5, PFHpA 16.6, PFHxA 18.4, PFPeA 17.6 |
| 2025-01-21 | SUEZ ZEBLEY (SW) | SE1 | 21.7 | <4 | 0.922 | PFBA 28.4, PFHpA 21.9, PFHxA 24.9, PFPeA 24 |
| 2025-04-21 | CWA SMITHBRIDGE (SW) | SE2 | <4 | <4 | 0 | none |
| 2025-04-21 | SUEZ MARSH (SW) | SE2 | 16.7 | <4 | 0.75 | PFBA 17.6, PFHpA 15.1, PFHxA 16.4, PFPeA 15 |
| 2025-04-21 | SUEZ SHARON (SW) | SE2 | 8.2 | <4 | 0 | PFBA 8.5, PFHpA 6.8, PFHxA 7.7, PFPeA 7.8 |
| 2025-04-21 | SUEZ ZEBLEY (SW) | SE2 | 16.6 | <4 | 0.78 | PFBA 17.8, PFHpA 15.1, PFHxA 16.3, PFPeA 14.9 |
| 2025-07-21 | CWA SMITHBRIDGE (SW) | SE3 | <4 | <4 | 0 | none |
| 2025-07-21 | SUEZ MARSH (SW) | SE3 | <4 | <4 | 0 | none |
| 2025-07-21 | SUEZ SHARON (SW) | SE3 | <4 | <4 | 0 | none |
| 2025-07-21 | SUEZ ZEBLEY (SW) | SE3 | <4 | <4 | 0 | none |
| 2025-10-20 | CWA SMITHBRIDGE (SW) | SE4 | <4 | <4 | 0.002 | PFHxA 3.4, PFPeA 3.8 |
| 2025-10-20 | SUEZ MARSH (SW) | SE4 | <4 | <4 | 0 | PFBA 19.8 |
| 2025-10-20 | SUEZ SHARON (SW) | SE4 | <4 | <4 | 0 | PFBA 20.6 |
| 2025-10-20 | SUEZ ZEBLEY (SW) | SE4 | <4 | <4 | 0 | PFBA 19.9 |
“<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.
CWA SMITHBRIDGE facility 101 · sample point EP101 · surface water
| Compound | MRL | 2025-01-21 SE1 | 2025-04-21 SE2 | 2025-07-21 SE3 | 2025-10-20 SE4 |
|---|---|---|---|---|---|
| PFBS | 3 ppt | 3 | < 3 | < 3 | 3.2 |
| PFHxA | 3 ppt | 3 | < 3 | < 3 | 3.4 |
| PFPeA | 3 ppt | 3.1 | < 3 | < 3 | 3.8 |
| 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 |
| 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 |
SUEZ MARSH facility 104 · sample point EP104 · surface water
| Compound | MRL | 2025-01-21 SE1 | 2025-04-21 SE2 | 2025-07-21 SE3 | 2025-10-20 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 29.6 | 17.6 | < 5 | 19.8 |
| PFBS | 3 ppt | 3.8 | < 3 | < 3 | < 3 |
| PFHpA | 3 ppt | 21.8 | 15.1 | < 3 | < 3 |
| PFHxA | 3 ppt | 24.7 | 16.4 | < 3 | < 3 |
| PFNA | 4 ppt | 9.7 | 7.5 | < 4 | < 4 |
| PFOA | 4 ppt | 22.3 | 16.7 | < 4 | < 4 |
| PFPeA | 3 ppt | 24.2 | 15 | < 3 | < 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 |
| PFOS | 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 |
SUEZ SHARON facility 102 · sample point EP102 · surface water
| Compound | MRL | 2025-01-21 SE1 | 2025-04-21 SE2 | 2025-07-21 SE3 | 2025-10-20 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 21.5 | 8.5 | < 5 | 20.6 |
| PFBS | 3 ppt | 3.5 | < 3 | < 3 | < 3 |
| PFHpA | 3 ppt | 16.6 | 6.8 | < 3 | < 3 |
| PFHxA | 3 ppt | 18.4 | 7.7 | < 3 | < 3 |
| PFNA | 4 ppt | 6.6 | < 4 | < 4 | < 4 |
| PFOA | 4 ppt | 16 | 8.2 | < 4 | < 4 |
| PFPeA | 3 ppt | 17.6 | 7.8 | < 3 | < 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 |
| PFOS | 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 |
SUEZ ZEBLEY facility 103 · sample point EP103 · surface water
| Compound | MRL | 2025-01-21 SE1 | 2025-04-21 SE2 | 2025-07-21 SE3 | 2025-10-20 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 28.4 | 17.8 | < 5 | 19.9 |
| PFBS | 3 ppt | 3.8 | < 3 | < 3 | < 3 |
| PFHpA | 3 ppt | 21.9 | 15.1 | < 3 | < 3 |
| PFHxA | 3 ppt | 24.9 | 16.3 | < 3 | < 3 |
| PFNA | 4 ppt | 9.2 | 7.8 | < 4 | < 4 |
| PFOA | 4 ppt | 21.7 | 16.6 | < 4 | < 4 |
| PFPeA | 3 ppt | 24 | 14.9 | < 3 | < 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 |
| PFOS | 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 | 16 | 56% | 29.6 2025-01-21 | 11.48–13.67 | 8.5 | 19.9 | 28.4 | 29.6 |
| PFHxA | 16 | 50% | 24.9 2025-01-21 | 7.17–8.68 | <MRL | 16.3 | 24.7 | 24.9 |
| PFPeA | 16 | 50% | 24.2 2025-01-21 | 6.9–8.4 | <MRL | 14.9 | 24 | 24.2 |
| PFHpA | 16 | 38% | 21.9 2025-01-21 | 6.08–7.96 | <MRL | 15.1 | 21.8 | 21.9 |
| PFOA | 16 | 38% | 22.3 2025-01-21 | 6.34–8.84 | <MRL | 16 | 21.7 | 22.3 |
| PFBS | 16 | 31% | 3.8 2025-01-21 | 1.08–3.14 | <MRL | 3 | 3.8 | 3.8 |
| PFNA | 16 | 31% | 9.7 2025-01-21 | 2.55–5.3 | <MRL | 6.6 | 9.2 | 9.7 |
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, PFOS, 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 2023-01-10 to 2026-04-09; 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 52bd2907cbc3 · 2026-10-18T04:10Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.