Public water system · NC0467030
ActiveNorthwest Onslow Water Assoc
At a glance
Northwest Onslow Water Assoc (PWSID NC0467030) is an active community water system in Onslow County, North Carolina. It reports serving 2,555 people through 1,006 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,555
Service connections
1,006
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Northwest Onslow Water Assoc compare with other water systems in Onslow County?
By EPA's size categories, Northwest Onslow Water Assoc is a small system (501 to 3,300 people). Onslow County has 21 active public water systems. Its population served is well below the county average of 13,759 people per system, and accounts for 0.9% 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 Northwest Onslow Water Assoc is about 62% below 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 Northwest Onslow Water Assoc?
EPA lists Northwest Onslow Water Assoc as privately owned. 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. 9 of the 21 active systems in Onslow County (43%) are also privately owned.
Does Northwest Onslow Water Assoc have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2022. The violations listed here began between January 2000 and August 2022. By type: 5 monitoring and reporting, 4 public notice, recordkeeping or other, 2 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (3 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 |
|---|---|---|---|---|
| 2022-08-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-10-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 2018-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-04-02 | Monitoring and reportingMonitoring, Routine (IDSE) · code 30 | Stage 2 Disinfectants and Disinfection Byproducts Rulecode 0600 | No | Resolved |
| 2007-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2007-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2005-10-10 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2004-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | 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.
Northwest Onslow Water Assoc: frequently asked questions
Who runs Northwest Onslow Water Assoc?
Northwest Onslow Water Assoc (PWSID NC0467030) is a community water system privately owned. It is regulated by the NC state drinking water program.
How many people does Northwest Onslow Water Assoc serve?
Northwest Onslow Water Assoc reports serving 2,555 people through 1,006 service connections in Onslow County, North Carolina.
Where does Northwest Onslow Water Assoc 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 Northwest Onslow Water Assoc have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2022. 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 Northwest Onslow Water Assoc'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, one is health-based, and the most recent began in August 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the NC state drinking water program.
Where can I find Northwest Onslow Water Assoc's water quality report?
As a community water system, Northwest Onslow Water Assoc 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 |
|---|---|---|---|---|
| Onslow Wtr and Sewer Authority | Onslow | 156,755 | Community | Groundwater |
| 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 |
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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, “Northwest Onslow Water Assoc, PWSID NC0467030, North Carolina”, https://aquacensus.com/water-systems/north-carolina/northwest-onslow-water-assoc-nc0467030 (data as of October 1, 2026).