Here is what the EPA's own data shows about tap water in Northeast Harbor. According to EPA SDWIS data retrieved October 2026, Northeast Harbor is served by 2 active community water systems, together reported to serve about 2,488 people.
As of October 2026, EPA records show 25 violations across the community water system(s) serving Northeast Harbor, going back to the earliest EPA record. None were health-based; the records are monitoring or reporting violations (a required test or report was late or missed). Each is listed by system below, with its status.
Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 1998 and December 2025. All have since returned to compliance, per EPA records.
Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times between October 2018 and October 2025. EPA records do not show all of these as returned to compliance.
Monitoring Total Haloacetic Acids (HAA5): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times between October 2018 and October 2025. EPA records do not show all of these as returned to compliance.
Monitoring Bromate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between July 2017 and July 2025. All have since returned to compliance, per EPA records.
Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2023. All have since returned to compliance, per EPA records.
Monitoring CARBON, TOTAL: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2017. All have since returned to compliance, per EPA records.
Monitoring Asbestos: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in January 2012. EPA records do not show all of these as returned to compliance.
Mount Desert Water Dist -Seal
865 served · surface water · PWSID ME0091420
Monitoring Bromate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between July 2017 and July 2025. All have since returned to compliance, per EPA records.
Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2023. All have since returned to compliance, per EPA records.
Monitoring CARBON, TOTAL: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2017. 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 October 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.