Public water system · VA3001620
ActiveOnancock, Town of
At a glance
Town of Onancock (PWSID VA3001620) is an active community water system in Accomack County, Virginia. It reports serving 1,525 people through 721 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in February 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,525
Service connections
721
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Town of Onancock compare with other water systems in Accomack County?
By EPA's size categories, Town of Onancock is a small system (501 to 3,300 people). Accomack County has 69 active public water systems, and Town of Onancock is the 5th-largest of them by population served. Its population served is about 3.7 times the county average of 415 people per system, and accounts for 5.3% of the 28,661 people reported by systems filed under the county. Across Virginia, the 2,420 active systems average 3,122 people each. Nationally, the average active community water system reports serving 6,703 people, so Town of Onancock is well 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. Virginia has 844 active community water systems, 35% of the state's 2,420 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,089 Virginia systems (86%) list groundwater as their primary source.
Who owns and regulates Town of Onancock?
EPA lists Town of Onancock as owned by a local government. The VA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 13 of the 69 active systems in Accomack County (19%) are also owned by a local government.
Does Town of Onancock have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in February 2025. The violations listed here began between June 1998 and February 2025. By type: 3 monitoring, 2 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (3 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2025-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2007-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 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.
Town of Onancock: frequently asked questions
Who runs Town of Onancock?
Town of Onancock (PWSID VA3001620) is a community water system owned by a local government. It is regulated by the VA state drinking water program.
How many people does Town of Onancock serve?
Town of Onancock reports serving 1,525 people through 721 service connections in Accomack County, Virginia.
Where does Town of Onancock 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 Town of Onancock have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in February 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 Town of Onancock'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 6 violations for this system; 1 is health-based, and the most recent began in February 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the VA state drinking water program.
Where can I find Town of Onancock's water quality report?
As a community water system, Town of Onancock 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 Accomack County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Chincoteague, Town of | Accomack | 3,344 | Community | Groundwater |
| Captains Cove | Accomack | 2,380 | Community | Groundwater |
| Perdue Farms Inc. | Accomack | 1,800 | Non-transient non-community | Groundwater |
| Nasa Wallops Flight Facility | Accomack | 1,625 | Community | Groundwater |
| Tyson Farms, Inc. | Accomack | 1,100 | Non-transient non-community | Groundwater |
| New Church Information Center | Accomack | 999 | Transient non-community | 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, “Onancock, Town of, PWSID VA3001620, Virginia”, https://aquacensus.com/water-systems/virginia/onancock-town-of-va3001620 (data as of October 1, 2026).