MT / Nashua
MT · Tap water records
Nashua tap water, in plain English
Here is what the EPA's own data shows about tap water in Nashua. According to EPA SDWIS data retrieved June 2026, Nashua is served by 1 active community water system, together reported to serve about 300 people.
As of June 2026, EPA records show 84 violations across the community water system(s) serving Nashua, going back to the earliest EPA record. 3 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
Nashua Town Of
300 served · surface water · PWSID MT0000297 - Health-based TTHM: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 3 times between October 2015 and April 2016. The EPA record lists a level of 84.5 UG/L; the limit (MCL) is 80 UG/L. All have since returned to compliance, per EPA records.
- Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 21 times between November 2016 and September 2025. EPA records do not show all of these as returned to compliance.
- Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 7 times between July 2017 and July 2025. EPA records do not show all of these as returned to compliance.
- Monitoring Orthophosphate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 7 times between January 2020 and January 2025. EPA records do not show all of these as returned to compliance.
- Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 15 times between January 2017 and January 2024. 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 15 times between January 2017 and January 2024. 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 16 times between October 2017 and January 2024. 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.