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Mount Arlington, NJ Tap Water Quality 2026

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

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

Main Utility: Mount Arlington Boro Dpw Main PWSID: NJ1426005 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.47 ppb, 23% of the action level and no violations are open. No PFAS was detected.

A

Mount Arlington earns an A for water quality

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

Lead: 3.47 ppb — 23% of the federal action level
PFAS tested, none detected
15 violations since 2015, 0 health-based
No violations currently open
Mount Arlington's lead level vs. all New Jersey community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.47 ppb — 23% of the federal action level
✓ Lower lead than 24% of New Jersey utilities
Population Served
4346
~685 connections
Water Source
Groundwater
Purchased groundwater from another system — SDWIS source code GWP
Active Violations
0
15 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
23% of EPA action level
3.47 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.47 ppb, 23% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MONITORING AND REPORTING — 0.080 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2025 Archived
Revised Total Coliform Rule REPORTING FAILURE — — 2024 Unaddressed
Revised Total Coliform Rule MONITORING FAILURE — — 2024 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2023–2024 Archived
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2023–2024 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2020–2021 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2018 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 Resolved
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

15 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Mount Arlington Boro Dpw Main
PWSID NJ1426005
Water source Groundwater — Purchased groundwater from another system — SDWIS source code GWP
Population served 4,346
Service connections 685
Systems serving this area 5
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Mount Arlington tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.47 ppb, 23% of the action level.
Does Mount Arlington water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Mount Arlington? ▼
Mount Arlington Boro Dpw Main (PWSID NJ1426005), one of 5 systems serving this area. Groundwater. Purchased groundwater from another system — SDWIS source code GWP
When was this system last inspected? ▼
It was last inspected on 2026-01-14. No significant deficiencies were recorded.

What Should Mount Arlington Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
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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