Public water system · MD1181337
ActiveMount Calvary Umc
At a glance
Mount Calvary Umc (PWSID MD1181337) is an active transient non-community water system in St. Mary's County, Maryland. It reports serving 41 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
41
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mount Calvary Umc compare with other water systems in St. Mary's County?
By EPA's size categories, Mount Calvary Umc is a very small system (500 people or fewer). St. Mary's County has 194 active public water systems. Its population served is well below the county average of 642 people per system, and accounts for less than 0.1% of the 124,635 people reported by systems filed under the county. Across Maryland, the 2,992 active systems average 1,947 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Mount Calvary Umc is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Maryland has 2,079 active transient non-community water systems, 69% 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 Mount Calvary Umc?
EPA lists Mount Calvary Umc 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. 137 of the 194 active systems in St. Mary's County (71%) are also privately owned.
Does Mount Calvary Umc have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Mount Calvary Umc. For the latest compliance status, check EPA ECHO for current compliance history.
Mount Calvary Umc: frequently asked questions
Who runs Mount Calvary Umc?
Mount Calvary Umc (PWSID MD1181337) is a transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Mount Calvary Umc serve?
Mount Calvary Umc reports serving 41 people through 2 service connections in St. Mary's County, Maryland.
Where does Mount Calvary Umc 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 Mount Calvary Umc have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Mount Calvary Umc'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Mount Calvary Umc's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mount Calvary Umc is a 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 St. Mary's County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lexington Park | St. Mary's | 43,030 | Community | Groundwater |
| Patuxent Naval Air Station (Navfac-Wash) | St. Mary's | 22,000 | Community | Groundwater |
| Town of Leonardtown | St. Mary's | 5,000 | Community | Groundwater |
| Country Lakes | St. Mary's | 3,016 | Community | Groundwater |
| Cedar Cove | St. Mary's | 2,728 | Community | Groundwater |
| Saint Marys College | St. Mary's | 2,200 | 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, “Mount Calvary Umc, PWSID MD1181337, Maryland”, https://aquacensus.com/water-systems/maryland/mount-calvary-umc-md1181337 (data as of October 1, 2026).