Water report · not indexed
What is in the water at 01810
2 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
ANDOVER WATER DEPT
PWSID MA3009000 · MA · serves 36,569 people
PFAS and lithium
1 compound detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 1 sample.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFPeA | 0.004 µg/L | 1 | 10/1/2025 |
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
2 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- TT · contaminant code 5000 · began 2021-11-01
- TT · contaminant code 5000 · began 2022-01-01
Hardness
Too few readings to state a hardness. 1 station(s), 33 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your water.
NORTH READING WATER DEPT.
PWSID MA3213000 · MA · serves 16,054 people
PFAS and lithium
3 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 6 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.006 µg/L | 1 | 10/4/2023 |
| PFPeA | 0.004 µg/L | 3 | 7/1/2024 |
| PFHxA | 0.003 µg/L | 2 | 10/4/2023 |
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
2 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- MCL · contaminant code 2950 · began 2020-04-01
- MCL · contaminant code 2950 · began 2020-07-01
Hardness
Too few readings to state a hardness. 1 station(s), 1 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your 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.