Public water system · ME0000278
ActiveHelen S Dunn School
At a glance
Helen S Dunn School (PWSID ME0000278) is an active non-transient non-community water system in Penobscot County, Maine. It reports serving 155 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
155
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Helen S Dunn School compare with other water systems in Penobscot County?
By EPA's size categories, Helen S Dunn School is a very small system (500 people or fewer). Penobscot County has 169 active public water systems. Its population served is well below the county average of 547 people per system, and accounts for 0.2% of the 92,416 people reported by systems filed under the county. Across Maine, the 1,862 active systems average 503 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Helen S Dunn School is about 64% below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Maine has 385 active non-transient non-community water systems, 21% of the state's 1,862 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,780 Maine systems (96%) list groundwater as their primary source.
Who owns and regulates Helen S Dunn School?
EPA lists Helen S Dunn School as owned by a local government. The ME state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 37 of the 169 active systems in Penobscot County (22%) are also owned by a local government.
Does Helen S Dunn School have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in December 2024. The violations listed here began between January 1993 and December 2024. By type: 4 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 3 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2002-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 4 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Helen S Dunn School: frequently asked questions
Who runs Helen S Dunn School?
Helen S Dunn School (PWSID ME0000278) is a non-transient non-community water system owned by a local government. It is regulated by the ME state drinking water program.
How many people does Helen S Dunn School serve?
Helen S Dunn School reports serving 155 people through 1 service connection in Penobscot County, Maine.
Where does Helen S Dunn School get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Helen S Dunn School have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in December 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Helen S Dunn School's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 4 violations for this system; none is health-based, and the most recent began in December 2024. For current results, consult EPA ECHO, or the ME state drinking water program.
Where can I find Helen S Dunn School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Helen S Dunn School is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Penobscot County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bangor Water District | Penobscot | 27,298 | Community | Surface water |
| Brewer Water Department | Penobscot | 8,860 | Community | Surface water |
| Old Town Water District | Penobscot | 7,648 | Community | Groundwater |
| Orono-Veazie Water District | Penobscot | 5,793 | Community | Groundwater |
| Maine Water Company Millinocket Division | Penobscot | 5,400 | Community | Surface water |
| Hampden Water District | Penobscot | 4,628 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Helen S Dunn School, PWSID ME0000278, Maine”, https://aquacensus.com/water-systems/maine/helen-s-dunn-school-me0000278 (data as of October 1, 2026).