Public water system · OH2000903
ActiveAyersville Water and Sewer District
At a glance
Ayersville Water and Sewer District (PWSID OH2000903) is an active community water system in Defiance County, Ohio. It reports serving 2,372 people through 628 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in July 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
2,372
Service connections
628
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Ayersville Water and Sewer District compare with other water systems in Defiance County?
By EPA's size categories, Ayersville Water and Sewer District is a small system (501 to 3,300 people). Defiance County has 25 active public water systems, and Ayersville Water and Sewer District is the 3rd-largest of them by population served. Its population served is about twice the county average of 1,119 people per system, and accounts for 8.5% of the 27,983 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 Ayersville Water and Sewer District is about 65% 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 Ayersville Water and Sewer District?
EPA lists Ayersville Water and Sewer District 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. 9 of the 25 active systems in Defiance County (36%) are also owned by a local government.
Does Ayersville Water and Sewer District have drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in July 2024. The violations listed here began between April 2019 and July 2024. By type: 10 contaminant level above the legal limit and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (10 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 |
|---|---|---|---|---|
| 2024-07-31 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2022-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2022-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2022-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2021-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2021-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2021-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2020-01-13 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2020-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2019-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2019-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2019-04-01 | 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.
Ayersville Water and Sewer District: frequently asked questions
Who runs Ayersville Water and Sewer District?
Ayersville Water and Sewer District (PWSID OH2000903) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Ayersville Water and Sewer District serve?
Ayersville Water and Sewer District reports serving 2,372 people through 628 service connections in Defiance County, Ohio.
Where does Ayersville Water and Sewer District 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 Ayersville Water and Sewer District have any drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in July 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 Ayersville Water and Sewer District'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, 10 are health-based, and the most recent began in July 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Ayersville Water and Sewer District's water quality report?
As a community water system, Ayersville Water and Sewer District 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 Defiance County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Defiance City | Defiance | 16,494 | Community | Surface water |
| Hicksville Village | Defiance | 3,600 | Community | Groundwater |
| Brunersburg Wd - Tinora Pws | Defiance | 859 | Non-transient non-community | Purchased surface water |
| Ney Village | Defiance | 854 | Community | Groundwater |
| Sherwood Village | Defiance | 811 | Community | Groundwater |
| Brunersburg Wd - Brunersburg Pws | Defiance | 500 | Community | Purchased surface water |
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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, “Ayersville Water and Sewer District, PWSID OH2000903, Ohio”, https://aquacensus.com/water-systems/ohio/ayersville-water-and-sewer-district-oh2000903 (data as of October 1, 2026).