A94/100
ROCHESTER HILLS — Water Quality Report 2026
Serving 74,000 people · Michigan
Water Source
Purchased Surface Water
County
—
System ID
MI0000325
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2009.
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 ROCHESTER HILLS
Is ROCHESTER HILLS water safe to drink?
ROCHESTER HILLS water receives a grade of A (94/100), 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 ROCHESTER HILLS detected?
69 contaminants were tested in ROCHESTER HILLS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ROCHESTER HILLS have any EPA violations?
Yes, ROCHESTER HILLS has 3 EPA violation(s) on record, with the most recent in 2009. Violation types include MR.
How many people does ROCHESTER HILLS serve?
ROCHESTER HILLS serves approximately 74,000 people, Michigan. The system provides water to 1 community: Rochester Hills.
What type of water does ROCHESTER HILLS provide?
ROCHESTER HILLS 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 MI0000325.
How does ROCHESTER HILLS compare to other utilities in Michigan?
ROCHESTER HILLS scores 94/100 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.