Public water system · MD1081198
ActiveCalvary Grace Assembly
At a glance
Calvary Grace Assembly (PWSID MD1081198) is an active transient non-community water system in Charles County, Maryland. It reports serving 100 people through 1 service connection. 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
100
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Calvary Grace Assembly compare with other water systems in Charles County?
By EPA's size categories, Calvary Grace Assembly is a very small system (500 people or fewer). Charles County has 134 active public water systems. Its population served is well below the county average of 300 people per system, and accounts for 0.2% of the 40,197 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 Calvary Grace Assembly is about 31% 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 Calvary Grace Assembly?
EPA lists Calvary Grace Assembly 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. 115 of the 134 active systems in Charles County (86%) are also privately owned.
Does Calvary Grace Assembly 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 Calvary Grace Assembly. For the latest compliance status, check EPA ECHO for current compliance history.
Calvary Grace Assembly: frequently asked questions
Who runs Calvary Grace Assembly?
Calvary Grace Assembly (PWSID MD1081198) is a transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Calvary Grace Assembly serve?
Calvary Grace Assembly reports serving 100 people through 1 service connection in Charles County, Maryland.
Where does Calvary Grace Assembly 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 Calvary Grace Assembly have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Calvary Grace Assembly'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 Calvary Grace Assembly's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Calvary Grace Assembly 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 Charles County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Town of La Plata | Charles | 11,535 | Community | Groundwater |
| Town of Indian Head | Charles | 4,100 | Community | Groundwater |
| Naval Support Facility, Indian Head | Charles | 3,321 | Community | Groundwater |
| Potomac Heights | Charles | 1,800 | Community | Groundwater |
| Welcome Center (Newburg) | Charles | 1,004 | Transient non-community | Groundwater |
| Beantown Texaco Food -Dash in | Charles | 900 | 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, “Calvary Grace Assembly, PWSID MD1081198, Maryland”, https://aquacensus.com/water-systems/maryland/calvary-grace-assembly-md1081198 (data as of October 1, 2026).