Water Quality in Mount Arlington, NJ: 16 Violations — Grade D
Grade D · Score 47/100 · 3 water systems · Updated 2026-05-03
Mount Arlington's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
The compliance record maintained by the EPA for Mount Arlington, NJ documents 16 water violations — each tied to a specific public water system and assigned a violation category in the federal Safe Drinking Water dataset.
Water Quality by ZIP Code in Mount Arlington
Water quality varies across Mount Arlington's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 07856 | D | 47 | 16 | 0 | View report → |
Water Quality Overview
Mount Arlington, New Jersey receives a water quality grade of D with an overall score of 47 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 3 water systems serving Mount Arlington have accumulated 16 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 9,373 people.
What Grade D Means
A grade of D indicates significant compliance issues. Mount Arlington's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
The average 90th percentile lead level across Mount Arlington water systems is 0.0086 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 50% of homes built before 1986, Mount Arlington has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Radon Risk
Mount Arlington is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Mount Arlington
Mount Arlington is served by 3 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 9,373 people across 1 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Mount Arlington. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Mount Arlington
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Mount Arlington Water Systems
The following contaminants have been detected or caused violations across Mount Arlington's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 4 | 1 | No |
| Revised Total Coliform Rule | Microbiological | N/A | 3 | 1 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 1 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 6 enforcement actions against water systems serving Mount Arlington. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-25 | State Filed Judgment |
| 2025-07-16 | State Order Extension |
| 2025-05-15 | State Filed Judgment |
| 2025-05-15 | State Informal Enforcement |
| 2024-11-15 | State Filed Judgment |
| 2024-11-15 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-25.
Mount Arlington vs. Nearby New Jersey Cities
How Mount Arlington's water quality compares to similar cities in New Jersey:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Mount Arlington | D | 16 | 3 | 9,373 |
| Ringwood | B | 14 | 1 | 9,327 |
| Audubon | C | 0 | 1 | 9,522 |
| Barrington | C | 0 | 1 | 9,522 |
Common Questions About Mount Arlington Water
These are the most common questions residents search for about water quality in Mount Arlington, New Jersey:
Is Mount Arlington water hard or soft? Water hardness varies by source. Mount Arlington's 3 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Mount Arlington tap water? Mount Arlington's water receives a grade of D (47/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Mount Arlington? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Mount Arlington vs. New Jersey Average
Understanding how Mount Arlington compares to the broader New Jersey average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Mount Arlington.
ZIP Codes in Mount Arlington
Mount Arlington spans 1 ZIP code. The ZIP with the lowest water quality score is 07856. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.