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Jefferson, NJ Tap Water Quality 2026

Water quality report for Jefferson, NJ — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Jefferson's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Jefferson Twp W U Lk Hop PWSID: NJ1414011 Updated: 2026 Q2
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PFAS above the federal limit at 2 of 2 sampling points

Lead was not detected and no violations are open. However, PFAS exceeds the federal limit at 2 of 2 sampling points, running as high as 2.3 times the limit.

D

Jefferson earns a D for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: not detected
PFAS above the federal limit at 2 of 2 sampling points
81 violations since 2015, 8 health-based
No violations currently open
Jefferson's lead level vs. all New Jersey community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of New Jersey utilities
Population Served
7607
~2490 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
81 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
107.7% of EPA action level
1,400 ppb
Action level: 1,300 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Revised Total Coliform Rule REPORTING FAILURE — — 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2025 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2025 Archived
Public Notice OTHER — — 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2025 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2025 Archived
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2025 Archived
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2025 Archived
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2025 Archived
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2025 Archived
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2025 Archived
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2025 Archived
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2025 Archived
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2025 Archived
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2025 Archived
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2025 Archived
Benzene MONITORING AND REPORTING — 0.005 mg/L 2025 Archived
Toluene MONITORING AND REPORTING — 1 mg/L 2025 Archived
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2025 Archived
Styrene MONITORING AND REPORTING — 0.1 mg/L 2025 Archived
Revised Total Coliform Rule REPORTING FAILURE — — 2024 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2024 Resolved
E. COLI MONITORING AND REPORTING — 0 2024 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Archived
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2024 Archived
E. COLI MONITORING AND REPORTING — 0 2024 Resolved
E. COLI MONITORING AND REPORTING — 0 2024 Resolved
Public Notice OTHER — — 2024 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2024 Resolved
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2024 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Archived
Revised Total Coliform Rule MONITORING FAILURE — — 2023 Resolved
E. COLI MONITORING AND REPORTING — 0 2023 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2023 Resolved
Consumer Confidence Rule OTHER — — 2023 Resolved
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2023 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Archived
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2023 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2022 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2022 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2022 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2022 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2022 Resolved
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2022 Archived
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2022 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2021 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2021 Resolved
Consumer Confidence Rule OTHER — — 2020 Resolved
E. COLI MONITORING AND REPORTING — 0 2020 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2018 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2018 Resolved
Revised Total Coliform Rule OTHER — — 2018 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2017–2019 Resolved
E. COLI MONITORING AND REPORTING — 0 2016 Resolved
Consumer Confidence Rule OTHER — — 2015 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2015 Archived
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

81 violations are on record since 2015, of which 8 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Jefferson Twp W U Lk Hop
PWSID NJ1414011
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 7,607
Service connections 2,490
Systems serving this area 11
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Jefferson tap water safe to drink? ▼
It meets most federal standards, but PFAS exceeds the federal limit at 2 of 2 sampling points. No violations are currently open.
Does Jefferson water have PFAS? ▼
Yes. PFAS exceeds the federal limit at 2 of 2 sampling points, running as high as 2.3 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.
Who supplies water to Jefferson? ▼
Jefferson Twp W U Lk Hop (PWSID NJ1414011), one of 11 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-06-13. No significant deficiencies were recorded.

What Should Jefferson Residents Do?

1
Consider a reverse-osmosis filter
Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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