C59/100
OBERLIN WATER DEPARTMENT — Water Quality Report 2026
Serving 8,600 people · Ohio
Water Source
Surface Water
County
—
System ID
OH4700911
Violations
9
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 68.00 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
1
Health-Related
TIER 1 — URGENTResolved
Violation related to Nitrate
When: March 1, 2024 – March 31, 2024Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
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 OBERLIN WATER DEPARTMENT
Is OBERLIN WATER DEPARTMENT water safe to drink?
OBERLIN WATER DEPARTMENT water receives a grade of C (59/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 9 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has OBERLIN WATER DEPARTMENT detected?
32 contaminants were tested in OBERLIN WATER DEPARTMENT's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does OBERLIN WATER DEPARTMENT have any EPA violations?
Yes, OBERLIN WATER DEPARTMENT has 9 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, Other, MCL. 6 are health-based violations.
How many people does OBERLIN WATER DEPARTMENT serve?
OBERLIN WATER DEPARTMENT serves approximately 8,600 people, Ohio.
What type of water does OBERLIN WATER DEPARTMENT provide?
OBERLIN WATER DEPARTMENT 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 OH4700911.
How does OBERLIN WATER DEPARTMENT compare to other utilities in Ohio?
OBERLIN WATER DEPARTMENT scores 59/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Ohio state page for a full comparison of water systems.