Public water system · ME0294931
ActiveMdi Bio Lab
At a glance
Mdi Bio Lab (PWSID ME0294931) is an active non-transient non-community water system in Hancock County, Maine. It reports serving 116 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in April 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
116
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Mdi Bio Lab compare with other water systems in Hancock County?
By EPA's size categories, Mdi Bio Lab is a very small system (500 people or fewer). Hancock County has 203 active public water systems. Its population served is about half of the county average of 232 people per system, and accounts for 0.2% 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 non-transient non-community water system reports serving 430 people, so Mdi Bio Lab is well 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 Mdi Bio Lab?
EPA lists Mdi Bio Lab as privately owned. 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. 157 of the 203 active systems in Hancock County (77%) are also privately owned.
Does Mdi Bio Lab have drinking water violations?
EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in April 2021. The violations listed here began between November 2006 and April 2021. By type: 4 monitoring and reporting, 3 contaminant level above the legal limit, 1 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 9 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2018-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2013-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2007-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2006-12-02 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2006-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2006-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 9 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.
Mdi Bio Lab: frequently asked questions
Who runs Mdi Bio Lab?
Mdi Bio Lab (PWSID ME0294931) is a non-transient non-community water system privately owned. It is regulated by the ME state drinking water program.
How many people does Mdi Bio Lab serve?
Mdi Bio Lab reports serving 116 people through 1 service connection in Hancock County, Maine.
Where does Mdi Bio Lab 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 Mdi Bio Lab have any drinking water violations?
EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in April 2021. 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 Mdi Bio Lab'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 9 violations for this system; 4 are health-based, and the most recent began in April 2021. For current results, consult EPA ECHO, or the ME state drinking water program.
Where can I find Mdi Bio Lab's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mdi Bio Lab 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 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, “Mdi Bio Lab, PWSID ME0294931, Maine”, https://aquacensus.com/water-systems/maine/mdi-bio-lab-me0294931 (data as of October 1, 2026).