Public water system · DE00A0426
Active301 Plaza
At a glance
301 Plaza (PWSID DE00A0426) is an active transient non-community water system in New Castle County, Delaware. It reports serving 300 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in January 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does 301 Plaza compare with other water systems in New Castle County?
By EPA's size categories, 301 Plaza is a very small system (500 people or fewer). New Castle County has 76 active public water systems. Its population served is well below the county average of 7,119 people per system, and accounts for less than 0.1% of the 541,043 people reported by systems filed under the county. Across Delaware, the 494 active systems average 2,238 people each. Nationally, the average active transient non-community water system reports serving 144 people, so 301 Plaza 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. Delaware has 193 active transient non-community water systems, 39% of the state's 494 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 459 Delaware systems (93%) list groundwater as their primary source.
Who owns and regulates 301 Plaza?
EPA lists 301 Plaza as privately owned. The DE state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 54 of the 76 active systems in New Castle County (71%) are also privately owned.
Does 301 Plaza have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 2006. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 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 |
|---|---|---|---|---|
| 2006-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The one violation in EPA's records.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.
301 Plaza: frequently asked questions
Who runs 301 Plaza?
301 Plaza (PWSID DE00A0426) is a transient non-community water system privately owned. It is regulated by the DE state drinking water program.
How many people does 301 Plaza serve?
301 Plaza reports serving 300 people through 1 service connection in New Castle County, Delaware.
Where does 301 Plaza 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 301 Plaza have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 2006. 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 301 Plaza'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 one violation for this system; it is health-based, and the most recent began in January 2006. For current results, consult EPA ECHO, or the DE state drinking water program.
Where can I find 301 Plaza's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. 301 Plaza 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 New Castle County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Artesian Water Company | New Castle | 231,114 | Community | Purchased surface water |
| Wilmington Water Department | New Castle | 107,976 | Community | Surface water |
| Veolia Water Delaware, Inc. | New Castle | 100,495 | Community | Surface water |
| Newark Water Department | New Castle | 40,000 | Community | Surface water |
| Middletown Water Department | New Castle | 17,700 | Community | Purchased surface water |
| Municipal Services Commission | New Castle | 5,549 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “301 Plaza, PWSID DE00A0426, Delaware”, https://aquacensus.com/water-systems/delaware/301-plaza-de00a0426 (data as of October 1, 2026).