Community Water System · PWS OH2000903
Ayersville Water and Sewer District
Operator location Defiance, Ohio - 72% of 167 violations are health-based (upper-third health share (> 23%)); surface water source; 1,660 served per SDWIS.
- 1,660
- People served (this PWS)
- 167
- EPA violations (this PWS)
- 120
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Ayersville Water and Sewer District standing, high SDWIS violation third
72% of 167 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 72% is upper-third health share (> 23%). Population rank #15,064 of 29,740 among systems serving 500+.
The verdict
Ayersville Water and Sewer District sits in the upper third of the sitemap cohort by violation count (167), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,660 (mid served population (≤ 3,309)). Health-based share is 72% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #15,064 of 29,740
- Population · /systems
- #473 of 931
- Population · OH
- 167
- Total EPA violations on record
- 72%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
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 |
Violation Count vs. the National Corpus
Ayersville Water and Sewer District has 167 recorded EPA violations, 83% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 17% carry more. 72% of this system's own violations are health-based (120 of 167), and it ranks #15,064 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
167 Higher than most more violations than 83% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Ayersville Water and Sewer District
120 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OH2000903.
Sources: EPA SDWIS · Ohio EPA, Division of Drinking and Ground Waters
Nationwide peers
167 violations · 1,660 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Ayersville Water and Sewer District
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Ohio compares on the same EPA violation measures. Ohio systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.