County · Ohio
Defiance County, Ohio: drinking water records
This overview covers 8 ZIP codes and 10 community water systems in Defiance County. It also stands in for 4 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Defiance City OH2000111 | 16,494 | 120 | 3 | 22 | 2.5 ppb |
| Hicksville Village OH2000212 | 3,600 | 60 | 0 | 0 | 1.6 ppb |
| Ayersville Water and Sewer District OH2000903 | 2,372 | 0 | 0 | 20 | 0 ppb |
| Ney Village OH2000512 | 854 | 0 | 0 | 1 | 2 ppb |
| Brunersburg WD - Brunersburg PWS OH2001103 | 500 | 0 | 0 | 3 | 0 ppb |
| Christi Water System INC OH2001003 | 483 | 0 | 0 | 3 | 0 ppb |
| Brunersburg WD - Evansport PWS OH2001203 | 268 | 0 | 0 | 25 | 0 ppb |
| Brunersburg WD - Airport PWS OH2001403 | 40 | 0 | 0 | 23 | 0 ppb |
| Timberbrook Mobile Home Park IN5220027 | 1,418 | 0 | 0 | 0 | 1.9 ppb |
| Sherwood Village OH2000712 | 811 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Defiance County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 43519, 43520, 43530, 43536.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.