Public water system · OH4101203
ActiveJefferson Co W&S District- O
At a glance
Jefferson Co W&S District- O (PWSID OH4101203) is an active community water system in Jefferson County, Ohio. It reports serving 340 people through 150 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
340
Service connections
150
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Jefferson Co W&S District- O compare with other water systems in Jefferson County?
By EPA's size categories, Jefferson Co W&S District- O is a very small system (500 people or fewer). Jefferson County has 33 active public water systems. Its population served is well below the county average of 1,758 people per system, and accounts for 0.6% of the 58,009 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active community water system reports serving 6,703 people, so Jefferson Co W&S District- O 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. Ohio has 1,028 active community water systems, 27% of the state's 3,854 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 191 Ohio systems (5%) list purchased surface water as their primary source.
Who owns and regulates Jefferson Co W&S District- O?
EPA lists Jefferson Co W&S District- O as owned by a local government. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 16 of the 33 active systems in Jefferson County (48%) are also owned by a local government.
Does Jefferson Co W&S District- O have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2026. The violations listed here began between July 2004 and January 2026. By type: 4 public notice, recordkeeping or other, 3 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 5 as resolved, 2 as unaddressed and 1 as archived. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2025-02-12 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2022-08-25 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2012-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 8 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.
Jefferson Co W&S District- O: frequently asked questions
Who runs Jefferson Co W&S District- O?
Jefferson Co W&S District- O (PWSID OH4101203) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Jefferson Co W&S District- O serve?
Jefferson Co W&S District- O reports serving 340 people through 150 service connections in Jefferson County, Ohio.
Where does Jefferson Co W&S District- O get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Jefferson Co W&S District- O have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2026. 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 Jefferson Co W&S District- O'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 8 violations for this system; none is health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Jefferson Co W&S District- O's water quality report?
As a community water system, Jefferson Co W&S District- O 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 Jefferson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Steubenville, City of | Jefferson | 17,000 | Community | Surface water |
| Jefferson Co W and S District - M | Jefferson | 13,983 | Community | Purchased surface water |
| Toronto Pws | Jefferson | 5,676 | Community | Surface water |
| Wintersville Village Pws | Jefferson | 3,924 | Community | Purchased surface water |
| Mingo Junction Pws | Jefferson | 3,350 | Community | Groundwater |
| Jefferson Co W and S District- A | Jefferson | 2,635 | 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, “Jefferson Co W&S District- O, PWSID OH4101203, Ohio”, https://aquacensus.com/water-systems/ohio/jefferson-co-w-s-district-o-oh4101203 (data as of October 1, 2026).