Oakland Water Dept

PFAS monitoring results for a public water system in New Jersey

NJ0242001UCMR 5EPA monitoring data
22Highest PFOA result, ppt
23Highest PFOS result, ppt
0.402Highest Hazard Index
210Results
PWSID
NJ0242001
State
New Jersey
System type
community water system (CWS)
Population served
12,754
City
Oakland
Counties
Bergen County
Primary source water
groundwater
UCMR 5 sampling
2023-04-21 to 2024-03-18 · 4 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

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 resultWorst entry-point average*Limit
PFOA (ppt)22214
PFOS (ppt)23234
Hazard Index0.4020.3671.0†

“<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 resultWorst entry-point average*New Jersey
PFNA (ppt)0013
PFOA (ppt)222114
PFOS (ppt)232313

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 2023-04-21 to 2024-03-18 · 4 entry point(s) · water types: GW · 14 sampling visits. PFAS in ppt (ng/L).

DateEntry pointEventPFOAPFOSHIOther detections
2023-04-21Bush Wellfield TP (GW)SE1n/an/an/anone
2023-04-21Farmers Wellfield TP (GW)SE1n/an/an/anone
2023-04-21Soon's Wellfield TP (GW)SE1n/an/an/anone
2023-04-21Well 10 TP (GW)SE1n/an/an/anone
2023-05-16Bush Wellfield TP (GW)SE1n/an/an/anone
2023-05-16Farmers Wellfield TP (GW)SE1127.20.322PFHxA 4.7, PFPeA 4.3
2023-05-16Soon's Wellfield TP (GW)SE16.36.30.002none
2023-05-16Well 10 TP (GW)SE1n/an/an/anone
2023-06-26Bush Wellfield TP (GW)SE121230.367PFBA 6.2, PFHpA 4, PFHxA 6.8, PFPeA 7.4
2023-07-06Well 10 TP (GW)SE122230.388PFBA 6, PFHpA 4.6, PFHxA 8.1, PFPeA 8.4
2023-11-28Farmers Wellfield TP (GW)SE2178.40.402PFHpA 3, PFHxA 5.2, PFPeA 4.7
2023-11-28Soon's Wellfield TP (GW)SE26.95.60none
2023-11-28Well 10 TP (GW)SE2n/an/an/anone
2024-03-18Well 10 TP (GW)SE2<4<40none

“<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

210 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.

Bush Wellfield TP facility 91002 · sample point TP001002 · groundwater

CompoundMRL2023-04-21
SE1
2023-05-16
SE1
2023-06-26
SE1
PFBA5 ppt––6.2
PFBS3 ppt––14
PFHpA3 ppt––4
PFHxA3 ppt––6.8
PFHxS3 ppt––3.6
PFOA4 ppt––21
PFOS4 ppt––23
PFPeA3 ppt––7.4
11Cl-PF3OUdS5 ppt––< 5
4:2 FTS3 ppt––< 3
6:2 FTS5 ppt––< 5
8:2 FTS5 ppt––< 5
9Cl-PF3ONS2 ppt––< 2
ADONA3 ppt––< 3
HFPO-DA5 ppt––< 5
NEtFOSAA5 ppt–< 5–
NFDHA20 ppt––< 20
NMeFOSAA6 ppt–< 6–
PFDA3 ppt––< 3
PFDoA3 ppt––< 3
PFEESA3 ppt––< 3
PFHpS3 ppt––< 3
PFMBA3 ppt––< 3
PFMPA4 ppt––< 4
PFNA4 ppt––< 4
PFPeS4 ppt––< 4
PFTA8 ppt–< 8–
PFTrDA7 ppt–< 7–
PFUnA2 ppt––< 2
lithium9 µg/L< 9––

Farmers Wellfield TP facility 93011 · sample point TP003011 · groundwater

CompoundMRL2023-04-21
SE1
2023-05-16
SE1
2023-11-28
SE2
PFBS3 ppt–3.63.7
PFHpA3 ppt–< 33
PFHxA3 ppt–4.75.2
PFHxS3 ppt–3.24
PFOA4 ppt–1217
PFOS4 ppt–7.28.4
PFPeA3 ppt–4.34.7
11Cl-PF3OUdS5 ppt–< 5< 5
4:2 FTS3 ppt–< 3< 3
6:2 FTS5 ppt–< 5< 5
8:2 FTS5 ppt–< 5< 5
9Cl-PF3ONS2 ppt–< 2< 2
ADONA3 ppt–< 3< 3
HFPO-DA5 ppt–< 5< 5
NEtFOSAA5 ppt–< 5< 5
NFDHA20 ppt–< 20< 20
NMeFOSAA6 ppt–< 6< 6
PFBA5 ppt–< 5< 5
PFDA3 ppt–< 3< 3
PFDoA3 ppt–< 3< 3
PFEESA3 ppt–< 3< 3
PFHpS3 ppt–< 3< 3
PFMBA3 ppt–< 3< 3
PFMPA4 ppt–< 4< 4
PFNA4 ppt–< 4< 4
PFPeS4 ppt–< 4< 4
PFTA8 ppt–< 8< 8
PFTrDA7 ppt–< 7< 7
PFUnA2 ppt–< 2< 2
lithium9 µg/L< 9–< 9

Soon's Wellfield TP facility 92006 · sample point TP002006 · groundwater

CompoundMRL2023-04-21
SE1
2023-05-16
SE1
2023-11-28
SE2
PFBS3 ppt–3.1< 3
PFOA4 ppt–6.36.9
PFOS4 ppt–6.35.6
11Cl-PF3OUdS5 ppt–< 5< 5
4:2 FTS3 ppt–< 3< 3
6:2 FTS5 ppt–< 5< 5
8:2 FTS5 ppt–< 5< 5
9Cl-PF3ONS2 ppt–< 2< 2
ADONA3 ppt–< 3< 3
HFPO-DA5 ppt–< 5< 5
NEtFOSAA5 ppt–< 5< 5
NFDHA20 ppt–< 20< 20
NMeFOSAA6 ppt–< 6< 6
PFBA5 ppt–< 5< 5
PFDA3 ppt–< 3< 3
PFDoA3 ppt–< 3< 3
PFEESA3 ppt–< 3< 3
PFHpA3 ppt–< 3< 3
PFHpS3 ppt–< 3< 3
PFHxA3 ppt–< 3< 3
PFHxS3 ppt–< 3< 3
PFMBA3 ppt–< 3< 3
PFMPA4 ppt–< 4< 4
PFNA4 ppt–< 4< 4
PFPeA3 ppt–< 3< 3
PFPeS4 ppt–< 4< 4
PFTA8 ppt–< 8< 8
PFTrDA7 ppt–< 7< 7
PFUnA2 ppt–< 2< 2
lithium9 µg/L< 9–< 9

Well 10 TP facility 13026 · sample point TP013026 · groundwater

CompoundMRL2023-04-21
SE1
2023-05-16
SE1
2023-07-06
SE1
2023-11-28
SE2
2024-03-18
SE2
PFBA5 ppt––6–< 5
PFBS3 ppt––15–< 3
PFHpA3 ppt––4.6–< 3
PFHxA3 ppt––8.1–< 3
PFHxS3 ppt––3.8–< 3
PFOA4 ppt––22–< 4
PFOS4 ppt––23–< 4
PFPeA3 ppt––8.4–< 3
11Cl-PF3OUdS5 ppt––< 5–< 5
4:2 FTS3 ppt––< 3–< 3
6:2 FTS5 ppt––< 5–< 5
8:2 FTS5 ppt––< 5–< 5
9Cl-PF3ONS2 ppt––< 2–< 2
ADONA3 ppt––< 3–< 3
HFPO-DA5 ppt––< 5–< 5
NEtFOSAA5 ppt–< 5–< 5–
NFDHA20 ppt––< 20–< 20
NMeFOSAA6 ppt–< 6–< 6–
PFDA3 ppt––< 3–< 3
PFDoA3 ppt––< 3–< 3
PFEESA3 ppt––< 3–< 3
PFHpS3 ppt––< 3–< 3
PFMBA3 ppt––< 3–< 3
PFMPA4 ppt––< 4–< 4
PFNA4 ppt––< 4–< 4
PFPeS4 ppt––< 4–< 4
PFTA8 ppt–< 8–< 8–
PFTrDA7 ppt–< 7–< 7–
PFUnA2 ppt––< 2–< 2
lithium9 µg/L< 9––< 9–

Statistics by compound

CompoundResultsDetectedHighest (date)Mean boundsKM medianP75P90P95
PFOA786%22
2023-07-06
12.17–12.7412212222
PFOS786%23
2023-06-26
10.5–11.077.2232323
PFBS771%15
2023-07-06
5.63–6.493.6141515
PFHxA757%8.1
2023-07-06
3.54–4.834.76.88.18.1
PFHxS757%4
2023-11-28
2.09–3.373.23.844
PFPeA757%8.4
2023-07-06
3.54–4.834.37.48.48.4
PFHpA743%4.6
2023-07-06
1.66–3.37<MRL44.64.6
PFBA729%6.2
2023-06-26
1.74–5.31<MRL66.26.2

Never detected (22): 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, 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 2026-05-29; 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.