A81/100
ST MARYS CITY — Water Quality Report 2026
Serving 9,356 people · Ohio
Water Source
Groundwater
County
—
System ID
OH0600612
Violations
4
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 49.00 mg/L | 1.30 mg/L | Over Limit |
strontium | 3900.00 µg/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 – August 4, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – August 4, 2025Rule: 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 ST MARYS CITY
Is ST MARYS CITY water safe to drink?
ST MARYS CITY water receives a grade of A (81/100), which is considered excellent. Out of 47 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ST MARYS CITY detected?
47 contaminants were tested in ST MARYS CITY's water. Notable contaminants include Copper (90th percentile), strontium. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does ST MARYS CITY have any EPA violations?
Yes, ST MARYS CITY has 4 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, Other. 1 are health-based violations.
How many people does ST MARYS CITY serve?
ST MARYS CITY serves approximately 9,356 people, Ohio.
What type of water does ST MARYS CITY provide?
ST MARYS CITY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is OH0600612.
How does ST MARYS CITY compare to other utilities in Ohio?
ST MARYS CITY scores 81/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Ohio state page for a full comparison of water systems.