F0/100
DEFIANCE CITY — Water Quality Report 2026
Serving 16,494 people · Ohio
Water Source
Surface Water
County
—
System ID
OH2000111
Violations
73
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 60.00 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
0
Unresolved
5
Health-Related
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2022 – September 30, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2022 – June 30, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2022 – March 31, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2021 – December 31, 2021Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2021 – September 30, 2021Rule: Stage 2 DBPREnforcement: Formal — state order issued
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About DEFIANCE CITY
Is DEFIANCE CITY water safe to drink?
DEFIANCE CITY water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 73 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has DEFIANCE CITY detected?
70 contaminants were tested in DEFIANCE CITY's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does DEFIANCE CITY have any EPA violations?
Yes, DEFIANCE CITY has 73 EPA violation(s) on record, with the most recent in 2022. Violation types include MCL, MR, Other. 54 are health-based violations.
How many people does DEFIANCE CITY serve?
DEFIANCE CITY serves approximately 16,494 people, Ohio.
What type of water does DEFIANCE CITY provide?
DEFIANCE CITY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OH2000111.
How does DEFIANCE CITY compare to other utilities in Ohio?
DEFIANCE CITY scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Ohio state page for a full comparison of water systems.