Public water system · MD1150014
ActiveMater Amoris Montessori School
At a glance
Mater Amoris Montessori School (PWSID MD1150014) is an active non-transient non-community water system in Montgomery County, Maryland. It reports serving 155 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 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 Mater Amoris Montessori School compare with other water systems in Montgomery County?
By EPA's size categories, Mater Amoris Montessori School is a very small system (500 people or fewer). Montgomery County has 49 active public water systems. Its population served is well below the county average of 39,103 people per system, and accounts for less than 0.1% of the 1,916,066 people reported by systems filed under the county. Across Maryland, the 2,992 active systems average 1,947 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Mater Amoris Montessori 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. Maryland has 491 active non-transient non-community water systems, 16% of the state's 2,992 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,870 Maryland systems (96%) list groundwater as their primary source.
Who owns and regulates Mater Amoris Montessori School?
EPA lists Mater Amoris Montessori School as privately owned. The MD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 40 of the 49 active systems in Montgomery County (82%) are also privately owned.
Does Mater Amoris Montessori School have drinking water violations?
EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 2024. The violations listed here began between October 1992 and October 2024. By type: 4 contaminant level above the legal limit, 4 monitoring and reporting, 1 required treatment not met, 1 reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 9 as resolved and 2 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 |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2021-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2008-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1994-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 11 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.
Mater Amoris Montessori School: frequently asked questions
Who runs Mater Amoris Montessori School?
Mater Amoris Montessori School (PWSID MD1150014) is a non-transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Mater Amoris Montessori School serve?
Mater Amoris Montessori School reports serving 155 people through 1 service connection in Montgomery County, Maryland.
Where does Mater Amoris Montessori 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 Mater Amoris Montessori School have any drinking water violations?
EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 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 Mater Amoris Montessori 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 11 violations for this system; 5 are health-based, and the most recent began in October 2024. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Mater Amoris Montessori School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mater Amoris Montessori 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 Montgomery County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Washington Suburban Sanitary Commission | Montgomery | 1,900,000 | Community | Surface water |
| Town of Poolesville | Montgomery | 6,005 | Community | Groundwater under influence of surface water |
| Adventist Healthcare Shady Grove Med Ctr | Montgomery | 2,100 | Non-transient non-community | Purchased surface water |
| National Institutes of Health | Montgomery | 1,100 | Non-transient non-community | Purchased surface water |
| Glenstone Foundation | Montgomery | 537 | Non-transient non-community | Groundwater |
| Dickerson Market | Montgomery | 510 | Transient non-community | Groundwater |
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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, “Mater Amoris Montessori School, PWSID MD1150014, Maryland”, https://aquacensus.com/water-systems/maryland/mater-amoris-montessori-school-md1150014 (data as of October 1, 2026).