Public water system · MD0170201
ActiveGunston Day School
At a glance
Gunston Day School (PWSID MD0170201) is an active non-transient non-community water system in Queen Anne's County, Maryland. It reports serving 150 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
150
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Gunston Day School compare with other water systems in Queen Anne's County?
By EPA's size categories, Gunston Day School is a very small system (500 people or fewer). Queen Anne's County has 92 active public water systems. Its population served is about half of the county average of 331 people per system, and accounts for 0.5% of the 30,426 people reported by systems filed under the county. Across Maryland, the 2,992 active systems average 1,947 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Gunston Day School is about 65% below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Maryland has 491 active non-transient non-community water systems, 16% 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 Gunston Day School?
EPA lists Gunston Day School 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. 70 of the 92 active systems in Queen Anne's County (76%) are also privately owned.
Does Gunston Day School have drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in October 2024. The violations listed here began between January 1996 and October 2024. By type: 2 monitoring and reporting, 2 contaminant level above the legal limit, 1 required treatment not met and 1 reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2009-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1996-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
All 6 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.
Gunston Day School: frequently asked questions
Who runs Gunston Day School?
Gunston Day School (PWSID MD0170201) is a non-transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Gunston Day School serve?
Gunston Day School reports serving 150 people through 1 service connection in Queen Anne's County, Maryland.
Where does Gunston Day School 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 Gunston Day School have any drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in October 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 Gunston Day School'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 6 violations for this system; 3 are health-based, and the most recent began in October 2024. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Gunston Day School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Gunston Day School is a non-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 Queen Anne's County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Stevensville | Queen Anne's | 9,155 | Community | Groundwater |
| Town of Centreville | Queen Anne's | 3,322 | Community | Groundwater |
| Bayside-Queenslanding | Queen Anne's | 1,030 | Community | Groundwater |
| Chesapeake College | Queen Anne's | 1,001 | Non-transient non-community | Groundwater |
| Prospect Bay | Queen Anne's | 913 | Community | Groundwater |
| Town of Queenstown | Queen Anne's | 705 | 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, “Gunston Day School, PWSID MD0170201, Maryland”, https://aquacensus.com/water-systems/maryland/gunston-day-school-md0170201 (data as of October 1, 2026).