Public water system · VA3131390
ActiveGreat Machipongo Clam Shack
At a glance
Great Machipongo Clam Shack (PWSID VA3131390) is an active transient non-community water system in Northampton County, Virginia. It reports serving 55 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in August 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
55
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Great Machipongo Clam Shack compare with other water systems in Northampton County?
By EPA's size categories, Great Machipongo Clam Shack is a very small system (500 people or fewer). Northampton County has 48 active public water systems. Its population served is well below the county average of 296 people per system, and accounts for 0.4% of the 14,188 people reported by systems filed under the county. Across Virginia, the 2,420 active systems average 3,122 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Great Machipongo Clam Shack is about 62% 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. Virginia has 1,133 active transient non-community water systems, 47% of the state's 2,420 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,089 Virginia systems (86%) list groundwater as their primary source.
Who owns and regulates Great Machipongo Clam Shack?
EPA lists Great Machipongo Clam Shack as privately owned. The VA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 34 of the 48 active systems in Northampton County (71%) are also privately owned.
Does Great Machipongo Clam Shack have drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in August 2021. The violations listed here began between August 1992 and August 2021. By type: 6 monitoring and reporting, 3 monitoring, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 9 as resolved and 2 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 |
|---|---|---|---|---|
| 2021-08-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-04-01 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-10-11 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1998-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 11 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.
Great Machipongo Clam Shack: frequently asked questions
Who runs Great Machipongo Clam Shack?
Great Machipongo Clam Shack (PWSID VA3131390) is a transient non-community water system privately owned. It is regulated by the VA state drinking water program.
How many people does Great Machipongo Clam Shack serve?
Great Machipongo Clam Shack reports serving 55 people through 1 service connection in Northampton County, Virginia.
Where does Great Machipongo Clam Shack 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 Great Machipongo Clam Shack have any drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in August 2021. 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 Great Machipongo Clam Shack'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 11 violations for this system; 1 is health-based, and the most recent began in August 2021. For current results, consult EPA ECHO, or the VA state drinking water program.
Where can I find Great Machipongo Clam Shack's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Great Machipongo Clam Shack 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 Northampton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cape Charles, Town of | Northampton | 3,740 | Community | Groundwater |
| Exmore, Town of | Northampton | 1,500 | Community | Groundwater |
| Sun Outdoors - Cape Charles | Northampton | 1,025 | Non-transient non-community | Groundwater |
| Yianni`S | Northampton | 800 | Transient non-community | Groundwater |
| Eastville, Town of | Northampton | 800 | Community | Groundwater |
| Kiptopeke State Park | Northampton | 555 | 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, “Great Machipongo Clam Shack, PWSID VA3131390, Virginia”, https://aquacensus.com/water-systems/virginia/great-machipongo-clam-shack-va3131390 (data as of October 1, 2026).