MA / Sudbury
MA · Tap water records
Sudbury tap water, in plain English
Here is what the EPA's own data shows about tap water in Sudbury. According to EPA SDWIS data retrieved June 2026, Sudbury is served by 5 active community water systems, together reported to serve about 19,059 people.
As of June 2026, EPA records show 9 violations across the community water system(s) serving Sudbury, going back to the earliest EPA record. 1 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.
What the EPA has on record, by system
Sudbury Water District
18,416 served · groundwater · PWSID MA3288000 - Health-based Revised Total Coliform Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in August 2025. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between January 2000 and June 2022. EPA records do not show all of these as returned to compliance.
- Monitoring ENTEROCOCCI: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in June 2019. EPA records do not show all of these as returned to compliance.
Codman Hill Condominium
360 served · groundwater · PWSID MA2037001 - 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 1993 and January 1999. All have since returned to compliance, per EPA records.
Sandy Bottom Estates Mhp
168 served · groundwater · PWSID ME0095615 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.
Three Rivers M H Community
63 served · groundwater · PWSID ME0008251 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.
The Village At Shepley Hill
52 served · groundwater · PWSID MA2115012 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.