Does Lexington, MA tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 6 violation(s) across the community water systems serving Lexington, of which 4 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Lexington, MA tap water come from?

Lexington is served by 2 active community water system(s). Their primary sources, per EPA records, are: surface water, groundwater.

MA / Lexington

MA · Tap water records

Lexington tap water, in plain English

Here is what the EPA's own data shows about tap water in Lexington. According to EPA SDWIS data retrieved June 2026, Lexington is served by 2 active community water systems, together reported to serve about 34,104 people.

As of June 2026, EPA records show 6 violations across the community water system(s) serving Lexington, going back to the earliest EPA record. 4 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.

2

Community water systems
~34,104

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Lexington Water Dept. (Mwra)

34,074 served · surface water · PWSID MA3155000

Health-based Lead and Copper Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 4 times between January 1992 and January 1999. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between July 2024 and January 2025. EPA records do not show all of these as returned to compliance.

Willows At Boxford

30 served · groundwater · PWSID MA3038028

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

What this means

A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.

This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.

Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.