Public water system · ME0091420
ActiveMount Desert Water Dist -Seal
At a glance
Mount Desert Water Dist -Seal (PWSID ME0091420) is an active community water system in Hancock County, Maine. It reports serving 865 people through 346 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
865
Service connections
346
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Mount Desert Water Dist -Seal compare with other water systems in Hancock County?
By EPA's size categories, Mount Desert Water Dist -Seal is a small system (501 to 3,300 people). Hancock County has 203 active public water systems. Its population served is about 3.7 times the county average of 232 people per system, and accounts for 1.8% of the 47,019 people reported by systems filed under the county. Across Maine, the 1,862 active systems average 503 people each. Nationally, the average active community water system reports serving 6,703 people, so Mount Desert Water Dist -Seal is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Maine has 386 active community water systems, 21% of the state's 1,862 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 61 Maine systems (3.3%) list surface water as their primary source.
Who owns and regulates Mount Desert Water Dist -Seal?
EPA lists Mount Desert Water Dist -Seal 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. 30 of the 203 active systems in Hancock County (15%) are also owned by a local government.
Does Mount Desert Water Dist -Seal have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025. The violations listed here began between February 1994 and July 2025. By type: 9 monitoring and reporting, 1 public notice, recordkeeping or other, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Bromate (5 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 1998-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1998-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1997-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1997-01-01 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 1994-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
The 12 most recent 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.
Mount Desert Water Dist -Seal: frequently asked questions
Who runs Mount Desert Water Dist -Seal?
Mount Desert Water Dist -Seal (PWSID ME0091420) is a community water system owned by a local government. It is regulated by the ME state drinking water program.
How many people does Mount Desert Water Dist -Seal serve?
Mount Desert Water Dist -Seal reports serving 865 people through 346 service connections in Hancock County, Maine.
Where does Mount Desert Water Dist -Seal get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Mount Desert Water Dist -Seal have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025. 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 Mount Desert Water Dist -Seal'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. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the ME state drinking water program.
Where can I find Mount Desert Water Dist -Seal's water quality report?
As a community water system, Mount Desert Water Dist -Seal must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Hancock County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Town of Bar Harbor- Water Division | Hancock | 4,443 | Community | Surface water |
| Ellsworth Water Department | Hancock | 3,910 | Community | Surface water |
| Southwest Harbor Water & Sewer District | Hancock | 2,480 | Community | Surface water |
| Maine Water Company Bucksport Division | Hancock | 1,700 | Community | Surface water |
| Mount Desert Water Dist North | Hancock | 1,623 | Community | Surface water |
| Castine Water Department | Hancock | 983 | Community | Groundwater under influence of 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, “Mount Desert Water Dist -Seal, PWSID ME0091420, Maine”, https://aquacensus.com/water-systems/maine/mount-desert-water-dist-seal-me0091420 (data as of October 1, 2026).