F0/100
WALNUT CREEK WATER CO. — Water Quality Report 2026
Serving 1,270 people · Ohio
Water Source
Groundwater
County
—
System ID
OH3801512
Violations
94
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.59 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024 – October 31, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – October 31, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Surface water treatment technique failure
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 WALNUT CREEK WATER CO.
Is WALNUT CREEK WATER CO. water safe to drink?
WALNUT CREEK WATER CO. water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 94 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WALNUT CREEK WATER CO. detected?
2 contaminants were tested in WALNUT CREEK WATER CO.'s water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does WALNUT CREEK WATER CO. have any EPA violations?
Yes, WALNUT CREEK WATER CO. has 94 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, Other. 3 are health-based violations.
How many people does WALNUT CREEK WATER CO. serve?
WALNUT CREEK WATER CO. serves approximately 1,270 people, Ohio.
What type of water does WALNUT CREEK WATER CO. provide?
WALNUT CREEK WATER CO. sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is OH3801512.
How does WALNUT CREEK WATER CO. compare to other utilities in Ohio?
WALNUT CREEK WATER CO. 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.