Public water system · NC0467035
ActiveOnslow Wtr and Sewer Authority
At a glance
Onslow Wtr and Sewer Authority (PWSID NC0467035) is an active community water system in Onslow County, North Carolina. It reports serving 156,755 people through 56,024 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in October 2024.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
156,755
Service connections
56,024
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Onslow Wtr and Sewer Authority compare with other water systems in Onslow County?
By EPA's size categories, Onslow Wtr and Sewer Authority is a very large system (more than 100,000 people). Onslow County has 21 active public water systems, and Onslow Wtr and Sewer Authority is the largest of them by population served. Its population served is about 11 times the county average of 13,759 people per system, and accounts for 54% of the 288,948 people reported by systems filed under the county. Across North Carolina, the 5,087 active systems average 1,971 people each. Nationally, the average active community water system reports serving 6,703 people, so Onslow Wtr and Sewer Authority is about 23 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. North Carolina has 2,031 active community water systems, 40% of the state's 5,087 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,566 North Carolina systems (90%) list groundwater as their primary source.
Who owns and regulates Onslow Wtr and Sewer Authority?
EPA lists Onslow Wtr and Sewer Authority as owned by a local government. The NC state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 21 active systems in Onslow County (24%) are also owned by a local government.
Does Onslow Wtr and Sewer Authority have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in October 2024. The violations listed here began between January 2013 and October 2024. By type: 4 public notice, recordkeeping or other, 4 reporting, 3 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Public Notice (4 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2024-10-28 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2023-12-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-07-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-06-28 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2019-06-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-04-03 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2014-02-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2013-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
The 12 most recent 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.
Onslow Wtr and Sewer Authority: frequently asked questions
Who runs Onslow Wtr and Sewer Authority?
Onslow Wtr and Sewer Authority (PWSID NC0467035) is a community water system owned by a local government. It is regulated by the NC state drinking water program.
How many people does Onslow Wtr and Sewer Authority serve?
Onslow Wtr and Sewer Authority reports serving 156,755 people through 56,024 service connections in Onslow County, North Carolina.
Where does Onslow Wtr and Sewer Authority 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 Onslow Wtr and Sewer Authority have any drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in October 2024. 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 Onslow Wtr and Sewer Authority'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. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the NC state drinking water program.
Where can I find Onslow Wtr and Sewer Authority's water quality report?
As a community water system, Onslow Wtr and Sewer Authority must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Onslow County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Jacksonville City of | Onslow | 49,093 | Community | Groundwater |
| Usmc Lejeune--Hadnot Point | Onslow | 37,500 | Community | Groundwater |
| Usmc Lejeune--Holcomb Blvd | Onslow | 17,000 | Community | Groundwater |
| Usmc Lejeune--New River Air St | Onslow | 11,500 | Community | Groundwater |
| Usmc Lejeune--Rifle Range | Onslow | 3,500 | Community | Purchased groundwater |
| Old Settlers Water System | Onslow | 2,677 | Community | Purchased 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, “Onslow Wtr and Sewer Authority, PWSID NC0467035, North Carolina”, https://aquacensus.com/water-systems/north-carolina/onslow-wtr-and-sewer-authority-nc0467035 (data as of October 1, 2026).