Public water system · NJ0707311
ActiveMainland Development Corp
At a glance
Mainland Development Corp (PWSID NJ0707311) is an active transient non-community water system in Essex County, New Jersey. It reports serving 40 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in April 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mainland Development Corp compare with other water systems in Essex County?
By EPA's size categories, Mainland Development Corp is a very small system (500 people or fewer). Essex County has 24 active public water systems. Its population served is well below the county average of 28,269 people per system, and accounts for less than 0.1% of the 678,447 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 Mainland Development Corp 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. 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 Mainland Development Corp?
EPA lists Mainland Development Corp 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. 4 of the 24 active systems in Essex County (17%) are also privately owned.
Does Mainland Development Corp have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in April 2019. The violations listed here began between May 2008 and April 2019. By type: 2 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2019-04-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-01-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2008-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 3 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.
Mainland Development Corp: frequently asked questions
Who runs Mainland Development Corp?
Mainland Development Corp (PWSID NJ0707311) is a transient non-community water system privately owned. It is regulated by the NJ state drinking water program.
How many people does Mainland Development Corp serve?
Mainland Development Corp reports serving 40 people through 1 service connection in Essex County, New Jersey.
Where does Mainland Development Corp 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 Mainland Development Corp have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in April 2019. 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 Mainland Development Corp'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 3 violations for this system; 1 is health-based, and the most recent began in April 2019. For current results, consult EPA ECHO, or the NJ state drinking water program.
Where can I find Mainland Development Corp's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mainland Development Corp 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 Essex County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Newark Water Department | Essex | 294,274 | Community | Surface water |
| East Orange Water Commission | Essex | 75,000 | Community | Groundwater |
| Bloomfield Water Department | Essex | 53,315 | Community | Purchased surface water |
| Montclair Water Bureau | Essex | 40,150 | Community | Purchased surface water |
| Belleville Water Dept | Essex | 35,129 | Community | Purchased surface water |
| Orange Water Dept | Essex | 30,134 | 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, “Mainland Development Corp, PWSID NJ0707311, New Jersey”, https://aquacensus.com/water-systems/new-jersey/mainland-development-corp-nj0707311 (data as of October 1, 2026).