Water report · not indexed
What is in the water at 07430
2 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
MAHWAH WATER DEPARTMENT
PWSID NJ0233001 · NJ · serves 26,777 people · service area inferred by a model, not supplied by the state
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 40 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 33 µg/L | 1 | 10/2/2024 |
| PFOA | 0.013 µg/L | 8 | 7/8/2025 |
| PFHxA | 0.0061 µg/L | 8 | 7/8/2025 |
| PFPeA | 0.0061 µg/L | 8 | 7/8/2025 |
| PFBA | 0.006 µg/L | 5 | 7/8/2025 |
| PFOS | 0.0045 µg/L | 4 | 5/28/2025 |
| PFBS | 0.0041 µg/L | 3 | 7/8/2025 |
| PFHpA | 0.0039 µg/L | 3 | 7/8/2025 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Median hardness 208 mg/L as CaCO₃, measured at 2 stations serving this system across 16 results, 2015-11-17 to 2017-08-15. Measured in the water source and distribution area, not at a tap, and not in your home.
RAMSEY WATER DEPT
PWSID NJ0248001 · NJ · serves 15,207 people · service area inferred by a model, not supplied by the state
PFAS and lithium
7 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 47 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 13 µg/L | 6 | 5/20/2024 |
| PFOA | 0.014 µg/L | 12 | 7/29/2024 |
| PFHxA | 0.0054 µg/L | 8 | 7/29/2024 |
| PFOS | 0.0053 µg/L | 6 | 6/24/2024 |
| PFPeA | 0.0052 µg/L | 8 | 7/29/2024 |
| PFBS | 0.0036 µg/L | 4 | 6/24/2024 |
| PFHpA | 0.0035 µg/L | 3 | 6/24/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01 · 2 of 2 service areas here are modelled.