NE / Duncan
NE · Tap water records
Duncan tap water, in plain English
Here is what the EPA's own data shows about tap water in Duncan. According to EPA SDWIS data retrieved June 2026, Duncan is served by 1 active community water system, together reported to serve about 392 people.
As of June 2026, EPA records show 11 violations across the community water system(s) serving Duncan, going back to the earliest EPA record. 8 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
Duncan, Village Of
392 served · groundwater · PWSID NE3114113 - Health-based Nitrate-Nitrite: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 6 times between October 2020 and January 2024. The EPA record lists a level of 15 MG/L; the limit (MCL) is 10 MG/L. EPA records do not show all of these as returned to compliance.
- Health-based Nitrate: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 2 times in September 1982. The EPA record lists a level of 10.5 ; the limit (MCL) is 10 . All have since returned to compliance, per EPA records.
- Monitoring Public Notice: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between June 2003 and October 2003. 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 2001. 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.