MA / West Yarmouth
MA · Tap water records
West Yarmouth tap water, in plain English
Here is what the EPA's own data shows about tap water in West Yarmouth. According to EPA SDWIS data retrieved June 2026, West Yarmouth is served by 1 active community water system, together reported to serve about 38,900 people.
As of June 2026, EPA records show 11 violations across the community water system(s) serving West Yarmouth, going back to the earliest EPA record. 2 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
Yarmouth Water Department
38,900 served · groundwater · PWSID MA4351000 - Health-based Revised Total Coliform Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 2 times in February 2018. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Monitoring ENTEROCOCCI: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in April 2021. EPA records do not show all of these as returned to compliance.
- Monitoring Nitrate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2020 and January 2021. EPA records do not show all of these as returned to compliance.
- Monitoring Nitrite: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in January 2020. EPA records do not show all of these as returned to compliance.
- Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in February 2018. All have since returned to compliance, per EPA records.
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.