Public water system · MD1181118
ActiveCooks Liquor and Deli (Hillville)
At a glance
Cooks Liquor and Deli (Hillville) (PWSID MD1181118) is an active transient non-community water system in St. Mary's County, Maryland. It reports serving 65 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in April 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
65
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Cooks Liquor and Deli (Hillville) compare with other water systems in St. Mary's County?
By EPA's size categories, Cooks Liquor and Deli (Hillville) 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 Cooks Liquor and Deli (Hillville) is about half of 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 Cooks Liquor and Deli (Hillville)?
EPA lists Cooks Liquor and Deli (Hillville) 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 Cooks Liquor and Deli (Hillville) have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in April 2020. The violations listed here began between July 1994 and April 2020. By type: 2 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 2020-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 1995-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 3 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.
Cooks Liquor and Deli (Hillville): frequently asked questions
Who runs Cooks Liquor and Deli (Hillville)?
Cooks Liquor and Deli (Hillville) (PWSID MD1181118) is a transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Cooks Liquor and Deli (Hillville) serve?
Cooks Liquor and Deli (Hillville) reports serving 65 people through 2 service connections in St. Mary's County, Maryland.
Where does Cooks Liquor and Deli (Hillville) 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 Cooks Liquor and Deli (Hillville) have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in April 2020. 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 Cooks Liquor and Deli (Hillville)'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 3 violations for this system; 2 are health-based, and the most recent began in April 2020. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Cooks Liquor and Deli (Hillville)'s water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cooks Liquor and Deli (Hillville) 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, “Cooks Liquor and Deli (Hillville), PWSID MD1181118, Maryland”, https://aquacensus.com/water-systems/maryland/cooks-liquor-and-deli-hillville-md1181118 (data as of October 1, 2026).