Public water system · MD1081165
ActiveThomas Stone National Historic Site
At a glance
Thomas Stone National Historic Site (PWSID MD1081165) is an active transient non-community water system in Charles County, Maryland. It reports serving 25 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Thomas Stone National Historic Site compare with other water systems in Charles County?
By EPA's size categories, Thomas Stone National Historic Site 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 less than 0.1% 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 Thomas Stone National Historic Site 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 Thomas Stone National Historic Site?
EPA lists Thomas Stone National Historic Site 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 Thomas Stone National Historic Site have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2024. The violations listed here began between January 2017 and January 2024. By type: 2 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Nitrate (2 of them). EPA lists 3 as resolved and 1 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 |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2019-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
All 4 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.
Thomas Stone National Historic Site: frequently asked questions
Who runs Thomas Stone National Historic Site?
Thomas Stone National Historic Site (PWSID MD1081165) is a transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Thomas Stone National Historic Site serve?
Thomas Stone National Historic Site reports serving 25 people through 4 service connections in Charles County, Maryland.
Where does Thomas Stone National Historic Site 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 Thomas Stone National Historic Site have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 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 Thomas Stone National Historic Site'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 4 violations for this system; none is health-based, and the most recent began in January 2024. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Thomas Stone National Historic Site's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Thomas Stone National Historic Site 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 |
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, “Thomas Stone National Historic Site, PWSID MD1081165, Maryland”, https://aquacensus.com/water-systems/maryland/thomas-stone-national-historic-site-md1081165 (data as of October 1, 2026).