Public water system · NY4430180
ActiveWal-Mart Potsdam
At a glance
Wal-Mart Potsdam (PWSID NY4430180) is an active non-transient non-community water system in St. Lawrence County, New York. It reports serving 350 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; none is health-based, and the most recent began in January 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
350
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Wal-Mart Potsdam compare with other water systems in St. Lawrence County?
By EPA's size categories, Wal-Mart Potsdam is a very small system (500 people or fewer). St. Lawrence County has 229 active public water systems. Its population served is roughly in line with the county average of 354 people per system, and accounts for 0.4% of the 81,125 people reported by systems filed under the county. Across New York, the 8,167 active systems average 2,374 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Wal-Mart Potsdam is about 19% 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. New York has 704 active non-transient non-community water systems, 8.6% of the state's 8,167 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 7,096 New York systems (87%) list groundwater as their primary source.
Who owns and regulates Wal-Mart Potsdam?
EPA lists Wal-Mart Potsdam as privately owned. The NY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 183 of the 229 active systems in St. Lawrence County (80%) are also privately owned.
Does Wal-Mart Potsdam have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in January 2025. The violations listed here began between January 2015 and January 2025. By type: 4 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (2 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 |
|---|---|---|---|---|
| 2025-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2019-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2017-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | 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.
Wal-Mart Potsdam: frequently asked questions
Who runs Wal-Mart Potsdam?
Wal-Mart Potsdam (PWSID NY4430180) is a non-transient non-community water system privately owned. It is regulated by the NY state drinking water program.
How many people does Wal-Mart Potsdam serve?
Wal-Mart Potsdam reports serving 350 people through 1 service connection in St. Lawrence County, New York.
Where does Wal-Mart Potsdam 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 Wal-Mart Potsdam have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in January 2025. 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 Wal-Mart Potsdam'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; none is health-based, and the most recent began in January 2025. For current results, consult EPA ECHO, or the NY state drinking water program.
Where can I find Wal-Mart Potsdam's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wal-Mart Potsdam 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 St. Lawrence County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Massena Village | St. Lawrence | 16,729 | Community | Surface water |
| Ogdensburg City | St. Lawrence | 10,064 | Community | Surface water |
| Potsdam Village | St. Lawrence | 8,312 | Community | Surface water |
| Canton Village | St. Lawrence | 7,055 | Community | Groundwater |
| Gouverneur | St. Lawrence | 4,263 | Community | Surface water |
| East Louisville Water District | St. Lawrence | 3,235 | Community | Surface water |
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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, “Wal-Mart Potsdam, PWSID NY4430180, New York”, https://aquacensus.com/water-systems/new-york/wal-mart-potsdam-ny4430180 (data as of October 1, 2026).