Public water system · MD1191052
ActiveShamrock Bar
At a glance
Shamrock Bar (PWSID MD1191052) is an active transient non-community water system in Maryland. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in October 1996.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Shamrock Bar compare with other water systems in Maryland?
By EPA's size categories, Shamrock Bar is a very small system (500 people or fewer). 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 Shamrock Bar 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 Shamrock Bar?
EPA lists Shamrock Bar 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.
Does Shamrock Bar have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 1996. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 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 |
|---|---|---|---|---|
| 1996-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The one violation in EPA's records.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.
Shamrock Bar: frequently asked questions
Who runs Shamrock Bar?
Shamrock Bar (PWSID MD1191052) is a transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Shamrock Bar serve?
Shamrock Bar reports serving 25 people through 1 service connection in Maryland.
Where does Shamrock Bar 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 Shamrock Bar have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 1996. 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 Shamrock Bar'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 one violation for this system; it is health-based, and the most recent began in October 1996. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Shamrock Bar's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Shamrock Bar 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 Maryland
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Washington Suburban Sanitary Commission | Montgomery | 1,900,000 | Community | Surface water |
| City of Baltimore | Baltimore city | 1,600,000 | Community | Surface water |
| Glen Burnie-Broadneck | Anne Arundel | 290,606 | Community | Groundwater |
| Howard County D.P.W. Distribution | Howard | 286,158 | Community | Purchased surface water |
| Harford County D.P.W. | Harford | 104,567 | Community | Surface water |
| City of Hagerstown | Washington | 92,200 | Community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Shamrock Bar, PWSID MD1191052, Maryland”, https://aquacensus.com/water-systems/maryland/shamrock-bar-md1191052 (data as of October 1, 2026).