AYERSVILLE WATER AND SEWER DISTRICT
PWS ID: OH2000903 · DEFIANCE, Ohio 43512-6985
AYERSVILLE WATER AND SEWER DISTRICT serves 1,660 people in DEFIANCE, Ohio using Surface Water water sources. It has 167 recorded EPA violations, including 120 health-based violations. No PFAS contamination was detected in UCMR5 testing.
Water Quality Snapshot: AYERSVILLE WATER AND SEWER DISTRICT
AYERSVILLE WATER AND SEWER DISTRICT is a local-owned community water system that delivers drinking water to 1,660 residents in DEFIANCE, Ohio (Defiance County) through 628 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 167 total violations for this system , of which 120 (72%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 36 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.
The most frequently cited contaminant at this system is TTHM, recorded in 120 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across Ohio, EPA tracks 4,181 public water systems serving 11,085,226 people, with 288,388 cumulative violations and 52,412 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. AYERSVILLE WATER AND SEWER DISTRICT's 167 violations sit above the Ohio average. Statewide, 204 of 346 UCMR5-tested systems have reported PFAS detections (59%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 628
- County
- Defiance
- School/Daycare
- No
- MCL Violations
- 120
- Monitoring Violations
- 36
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 120 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 17 | 2014 |
| TTHM | MR | 13 | 2014 |
| Consumer Confidence Rule | Other | 10 | 2024 |
| Lead and Copper Rule | MR | 4 | 1999 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | 2010 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for AYERSVILLE WATER AND SEWER DISTRICT.
EPA SDWIS — Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID OH2000903 on SDWISSource: EPA SDWIS Federal Reports Search
Ohio Drinking Water Authority
Ohio EPA — Division of Drinking and Ground Waters is the primacy agency that licenses and inspects AYERSVILLE WATER AND SEWER DISTRICT under EPA-delegated authority.
Open OH regulator portalViolation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2024 | Consumer Confidence Rule | Other | 10 | SDWIS / OH2000903 / 7000 |
| 2022 | TTHM | MCL | 120 | SDWIS / OH2000903 / 2950 |
| 2014 | Total Haloacetic Acids (HAA5) | MR | 17 | SDWIS / OH2000903 / 2456 |
| 2014 | TTHM | MR | 13 | SDWIS / OH2000903 / 2950 |
| 2010 | Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | SDWIS / OH2000903 / 0600 |
| 1999 | Lead and Copper Rule | MR | 4 | SDWIS / OH2000903 / 5000 |
How AYERSVILLE WATER AND SEWER DISTRICT Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | AYERSVILLE WATER AND SEWER DISTRICT | Ohio avg | Federal benchmark |
|---|---|---|---|
| Total violations | 167 | 69 | SDWA compliance — any non-zero count is a recorded breach |
| Health-based violations | 120 | 12.5 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 59% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 1,660 | 2,651 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,181 regulated public water systems in Ohio.
Federal MCL reference — Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is AYERSVILLE WATER AND SEWER DISTRICT water safe to drink? ▼
How many people does AYERSVILLE WATER AND SEWER DISTRICT serve? ▼
What type of violations does AYERSVILLE WATER AND SEWER DISTRICT have? ▼
Has PFAS been detected in AYERSVILLE WATER AND SEWER DISTRICT water? ▼
What water source does AYERSVILLE WATER AND SEWER DISTRICT use? ▼
Where does this data come from? ▼
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Related Data for Ohio
Read our methodology — how this data is sourced, computed, and verified.