Blairstown Commons
PWSID: NJ2104305
This system currently has unresolved violations for: 5000. These violations mean contaminant levels exceeded EPA limits or required treatment was not performed.
This system has more violations on record than 92% of water systems in New Jersey.
Violation trend: 9.4 per year over the last 5 years, up from 0.6 per year in the previous 5.
System Details
| Population Served | 238 |
| Service Connections | 1 |
| Water Source | Groundwater |
| System Type | Non-Transient Non-Community |
| Owner | Private |
| Status | Active |
| City | Denville |
| EPA ZIP on File | 07834 |
Areas Served
- Warren County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Copper (90th percentile) | 6.5000 mg/L | 1.300 mg/L | Exceeds Action Level |
| Copper (90th percentile) | 3.4300 mg/L | 1.300 mg/L | Exceeds Action Level |
| Copper (90th percentile) | 2.2100 mg/L | 1.300 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0070 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0066 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0052 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0050 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0045 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0043 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0043 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0040 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0017 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0017 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0009 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0000 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0000 mg/L | 0.015 mg/L | Below Action Level |
1 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 5000 | TT | 2021-12-12 | Yes | Open |
Violation History (50 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 5000 | MR | 2025-04-01 | Returned to Compliance | |
| 2378 | MR | 2024-01-01 | Major | Acknowledged |
| 2378 | MR | 2024-01-01 | Major | Acknowledged |
| 2380 | MR | 2024-01-01 | Major | Acknowledged |
| 2380 | MR | 2024-01-01 | Major | Acknowledged |
| 2955 | MR | 2024-01-01 | Major | Acknowledged |
| 2955 | MR | 2024-01-01 | Major | Acknowledged |
| 2964 | MR | 2024-01-01 | Major | Acknowledged |
| 2964 | MR | 2024-01-01 | Major | Acknowledged |
| 2968 | MR | 2024-01-01 | Major | Acknowledged |
| 2968 | MR | 2024-01-01 | Major | Acknowledged |
| 2969 | MR | 2024-01-01 | Major | Acknowledged |
| 2969 | MR | 2024-01-01 | Major | Acknowledged |
| 2976 | MR | 2024-01-01 | Major | Acknowledged |
| 2976 | MR | 2024-01-01 | Major | Acknowledged |
| 2977 | MR | 2024-01-01 | Major | Acknowledged |
| 2977 | MR | 2024-01-01 | Major | Acknowledged |
| 2979 | MR | 2024-01-01 | Major | Acknowledged |
| 2979 | MR | 2024-01-01 | Major | Acknowledged |
| 2980 | MR | 2024-01-01 | Major | Acknowledged |
| 2980 | MR | 2024-01-01 | Major | Acknowledged |
| 2981 | MR | 2024-01-01 | Major | Acknowledged |
| 2981 | MR | 2024-01-01 | Major | Acknowledged |
| 2982 | MR | 2024-01-01 | Major | Acknowledged |
| 2982 | MR | 2024-01-01 | Major | Acknowledged |
| 2983 | MR | 2024-01-01 | Major | Acknowledged |
| 2983 | MR | 2024-01-01 | Major | Acknowledged |
| 2984 | MR | 2024-01-01 | Major | Acknowledged |
| 2984 | MR | 2024-01-01 | Major | Acknowledged |
| 2985 | MR | 2024-01-01 | Major | Acknowledged |
| 2985 | MR | 2024-01-01 | Major | Acknowledged |
| 2987 | MR | 2024-01-01 | Major | Acknowledged |
| 2987 | MR | 2024-01-01 | Major | Acknowledged |
| 2989 | MR | 2024-01-01 | Major | Acknowledged |
| 2989 | MR | 2024-01-01 | Major | Acknowledged |
| 2990 | MR | 2024-01-01 | Major | Acknowledged |
| 2990 | MR | 2024-01-01 | Major | Acknowledged |
| 2991 | MR | 2024-01-01 | Major | Acknowledged |
| 2991 | MR | 2024-01-01 | Major | Acknowledged |
| 2992 | MR | 2024-01-01 | Major | Acknowledged |
| 2992 | MR | 2024-01-01 | Major | Acknowledged |
| 2996 | MR | 2024-01-01 | Major | Acknowledged |
| 2996 | MR | 2024-01-01 | Major | Acknowledged |
| 5000 | MR | 2023-09-29 | Returned to Compliance | |
| 5000 | MR | 2023-09-29 | Returned to Compliance | |
| 5000 | MR | 2022-09-29 | Returned to Compliance | |
| 5000 | MR | 2021-04-01 | Returned to Compliance | |
| 8000 | TT | 2018-10-06 | Yes | Returned to Compliance |
| 8000 | MCL | 2018-06-01 | Yes | Returned to Compliance |
Understanding This Water System's Record
Blairstown Commons is a non-transient non-community water system that draws from groundwater sources and serves a population of 238 in Denville, New Jersey. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.
What Do These Violations Mean?
Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.
What Should You Do?
Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.