A92/100
ROYAL OAK, CITY OF — Water Quality Report 2026
Serving 57,236 people · Michigan
Water Source
Purchased Surface Water
County
—
System ID
MI0005830
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – September 20, 2021Enforcement: 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 ROYAL OAK, CITY OF
Is ROYAL OAK, CITY OF water safe to drink?
ROYAL OAK, CITY OF water receives a grade of A (92/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ROYAL OAK, CITY OF detected?
69 contaminants were tested in ROYAL OAK, CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ROYAL OAK, CITY OF have any EPA violations?
Yes, ROYAL OAK, CITY OF has 5 EPA violation(s) on record, with the most recent in 2021. Violation types include Other, MR.
How many people does ROYAL OAK, CITY OF serve?
ROYAL OAK, CITY OF serves approximately 57,236 people, Michigan. The system provides water to 1 community: Royal Oak.
What type of water does ROYAL OAK, CITY OF provide?
ROYAL OAK, CITY OF sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is MI0005830.
How does ROYAL OAK, CITY OF compare to other utilities in Michigan?
ROYAL OAK, CITY OF scores 92/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Michigan state page for a full comparison of water systems.