Public water system · NJ0209300
ActiveDemarest Swim Club
At a glance
Demarest Swim Club (PWSID NJ0209300) is an active transient non-community water system in Bergen County, New Jersey. It reports serving 291 people through 2 service connections. 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 May 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
291
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Demarest Swim Club compare with other water systems in Bergen County?
By EPA's size categories, Demarest Swim Club is a very small system (500 people or fewer). Bergen County has 51 active public water systems. Its population served is well below the county average of 22,621 people per system, and accounts for less than 0.1% of the 1,153,643 people reported by systems filed under the county. Across New Jersey, the 3,496 active systems average 2,750 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Demarest Swim Club is about twice 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. New Jersey has 2,277 active transient non-community water systems, 65% of the state's 3,496 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,313 New Jersey systems (95%) list groundwater as their primary source.
Who owns and regulates Demarest Swim Club?
EPA lists Demarest Swim Club as privately owned. The NJ state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 29 of the 51 active systems in Bergen County (57%) are also privately owned.
Does Demarest Swim Club have drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in May 2025. The violations listed here began between May 2018 and May 2025. By type: 6 reporting, 3 monitoring, 1 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (10 of them). EPA lists 10 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-05-26 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Unaddressed |
| 2019-10-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-05-27 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2018-09-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-08-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-06-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-05-27 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
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.
Demarest Swim Club: frequently asked questions
Who runs Demarest Swim Club?
Demarest Swim Club (PWSID NJ0209300) is a transient non-community water system privately owned. It is regulated by the NJ state drinking water program.
How many people does Demarest Swim Club serve?
Demarest Swim Club reports serving 291 people through 2 service connections in Bergen County, New Jersey.
Where does Demarest Swim Club 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 Demarest Swim Club have any drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in May 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 Demarest Swim Club'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 May 2025. For current results, consult EPA ECHO, or the NJ state drinking water program.
Where can I find Demarest Swim Club's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Demarest Swim Club 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 Bergen County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Veolia Water New Jersey Hackensack | Bergen + 1 more | 792,713 | Community | Surface water |
| Ridgewood Water | Bergen | 61,700 | Community | Purchased surface water |
| Fair Lawn Water Dept | Bergen | 35,564 | Community | Purchased surface water |
| Garfield Water Department | Bergen | 30,487 | Community | Purchased surface water |
| Mahwah Water Department | Bergen | 26,777 | Community | Surface water |
| Passaic Valley Wc Lodi Wd | Bergen | 24,136 | Community | Purchased 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, “Demarest Swim Club, PWSID NJ0209300, New Jersey”, https://aquacensus.com/water-systems/new-jersey/demarest-swim-club-nj0209300 (data as of October 1, 2026).