- PWSID
- NJ0228001
- State
- New Jersey
- System type
- community water system (CWS)
- Population served
- 4,060
- City
- Hohokus Boro
- Counties
- Bergen County
- Primary source water
- groundwater
- UCMR 5 sampling
- 2023-02-08 to 2023-10-11 · 4 entry point(s) · water types: GW
- Service-area boundary
- authoritative
PFOA ≥ 3 × its limit highest single result
PFOA ≥ 3 × its limit worst entry-point average
Open on the New Jersey map · All New Jersey 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) | 30.4 | 28.95 | 4 |
| PFOS (ppt) | 21 | 15.25 | 4 |
| Hazard Index | 2.087 | 1.977 | 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 New Jersey standards
| Highest single result | Worst entry-point average* | New Jersey | |
|---|---|---|---|
| PFNA (ppt) | 16.1 | 13.45 | 13 |
| PFOA (ppt) | 30.4 | 28.95 | 14 |
| PFOS (ppt) | 21 | 15.25 | 13 |
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 2023-02-08 to 2023-10-11 · 4 entry point(s) · water types: GW · 9 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-02-08 | HO HO KUS WATER DEPT (GW) | SE1 | 25 | 7.3 | 0.002 | PFBA 6.9, PFHpA 6.2, PFHxA 8.6, PFPeA 8.2 |
| 2023-02-08 | HO HO KUS WATER DEPT (GW) | SE1 | 20.3 | 8.1 | 0.363 | PFBA 5.9, PFHpA 4.7, PFHxA 6.3, PFPeA 6.5 |
| 2023-02-08 | HO HO KUS WATER DEPT (GW) | SE1 | 20.9 | 9 | 1.102 | PFBA 6.6, PFHpA 4.2, PFHxA 4.9, PFPeA 4.8, lithium 11.3 µg/L |
| 2023-02-08 | HO HO KUS WATER DEPT (GW) | SE1 | 27.5 | 16.1 | 1.867 | PFBA 7.2, PFHpA 6.5, PFHxA 9, PFPeA 8.6 |
| 2023-08-14 | HO HO KUS WATER DEPT (GW) | SE2 | 29.3 | 21 | 1.022 | PFBA 9.4, PFHpA 8.1, PFHxA 12.4, PFPeA 14 |
| 2023-08-14 | HO HO KUS WATER DEPT (GW) | SE2 | 23.8 | 10.2 | 0.342 | PFBA 7, PFHpA 5.5, PFHxA 9.3, PFPeA 9.2 |
| 2023-08-14 | HO HO KUS WATER DEPT (GW) | SE2 | 21.6 | 9 | 1.062 | PFBA 6.6, PFHpA 4, PFHxA 4.5, PFPeA 4.8, lithium 14.7 µg/L |
| 2023-08-14 | HO HO KUS WATER DEPT (GW) | SE2 | 30.4 | 14.4 | 2.087 | PFBA 6.8, PFHpA 5.9, PFHxA 7.5, PFPeA 7.4, lithium 9.03 µg/L |
| 2023-10-11 | HO HO KUS WATER DEPT (GW) | SE2 | n/a | n/a | n/a | 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
240 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.
HO HO KUS WATER DEPT facility TP001001 · sample point TP001001 · groundwater
| Compound | MRL | 2023-02-08 SE1 | 2023-08-14 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 6.9 | 9.4 |
| PFBS | 3 ppt | 3.7 | 4.8 |
| PFHpA | 3 ppt | 6.2 | 8.1 |
| PFHxA | 3 ppt | 8.6 | 12.4 |
| PFHxS | 3 ppt | < 3 | 5.5 |
| PFNA | 4 ppt | < 4 | 4.7 |
| PFOA | 4 ppt | 25 | 29.3 |
| PFOS | 4 ppt | 7.3 | 21 |
| PFPeA | 3 ppt | 8.2 | 14 |
| 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 |
| 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 |
| 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 |
HO HO KUS WATER DEPT facility TP002004 · sample point TP002004 · groundwater
| Compound | MRL | 2023-02-08 SE1 | 2023-08-14 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 5.9 | 7 |
| PFBS | 3 ppt | 5.3 | 4.6 |
| PFHpA | 3 ppt | 4.7 | 5.5 |
| PFHxA | 3 ppt | 6.3 | 9.3 |
| PFHxS | 3 ppt | 3.6 | 3.4 |
| PFOA | 4 ppt | 20.3 | 23.8 |
| PFOS | 4 ppt | 8.1 | 10.2 |
| PFPeA | 3 ppt | 6.5 | 9.2 |
| 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 |
| 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 |
| 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 |
HO HO KUS WATER DEPT facility TP003007 · sample point TP003007 · groundwater
| Compound | MRL | 2023-02-08 SE1 | 2023-08-14 SE2 |
|---|---|---|---|
| PFBA | 5 ppt | 6.6 | 6.6 |
| PFBS | 3 ppt | 4.8 | 4.9 |
| PFHpA | 3 ppt | 4.2 | 4 |
| PFHxA | 3 ppt | 4.9 | 4.5 |
| PFHxS | 3 ppt | 4.2 | 4.6 |
| PFNA | 4 ppt | 6.8 | 6 |
| PFOA | 4 ppt | 20.9 | 21.6 |
| PFOS | 4 ppt | 9 | 9 |
| PFPeA | 3 ppt | 4.8 | 4.8 |
| 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 |
| 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 |
| PFPeS | 4 ppt | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 11.3 | 14.7 |
HO HO KUS WATER DEPT facility TP004009 · sample point TP004009 · groundwater
| Compound | MRL | 2023-02-08 SE1 | 2023-08-14 SE2 | 2023-10-11 SE2 |
|---|---|---|---|---|
| PFBA | 5 ppt | 7.2 | 6.8 | – |
| PFBS | 3 ppt | 13.8 | 13.5 | – |
| PFHpA | 3 ppt | 6.5 | 5.9 | – |
| PFHxA | 3 ppt | 9 | 7.5 | – |
| PFHxS | 3 ppt | 7.8 | 4.7 | – |
| PFNA | 4 ppt | 10.8 | 16.1 | – |
| PFOA | 4 ppt | 27.5 | 30.4 | – |
| PFOS | 4 ppt | 16.1 | 14.4 | – |
| PFPeA | 3 ppt | 8.6 | 7.4 | – |
| 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 |
| 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 | – |
| 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 | 9.03 | – |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBA | 8 | 100% | 9.4 2023-08-14 | 7.05–7.05 | 6.8 | 7 | 9.4 | 9.4 |
| PFBS | 8 | 100% | 13.8 2023-02-08 | 6.92–6.92 | 4.8 | 5.3 | 13.8 | 13.8 |
| PFHpA | 8 | 100% | 8.1 2023-08-14 | 5.64–5.64 | 5.5 | 6.2 | 8.1 | 8.1 |
| PFHxA | 8 | 100% | 12.4 2023-08-14 | 7.81–7.81 | 7.5 | 9 | 12.4 | 12.4 |
| PFOA | 8 | 100% | 30.4 2023-08-14 | 24.85–24.85 | 23.8 | 27.5 | 30.4 | 30.4 |
| PFOS | 8 | 100% | 21 2023-08-14 | 11.89–11.89 | 9 | 14.4 | 21 | 21 |
| PFPeA | 8 | 100% | 14 2023-08-14 | 7.94–7.94 | 7.4 | 8.6 | 14 | 14 |
| PFHxS | 8 | 88% | 7.8 2023-02-08 | 4.22–4.6 | 4.2 | 4.7 | 7.8 | 7.8 |
| PFNA | 8 | 62% | 16.1 2023-08-14 | 5.55–7.05 | 4.7 | 6.8 | 16.1 | 16.1 |
| lithium | 8 | 38% | 14.7 2023-08-14 | 4.38–10 | <MRL | 9.03 | 14.7 | 14.7 |
Never detected (20): 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, PFPeS, PFTA, PFTrDA, PFUnA.
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 2026-05-29; 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 0c4398dd12d6 · 2026-10-18T04:09Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.