B71/100
CHELSEA — Water Quality Report 2026
Serving 5,474 people · Michigan
Water Source
Groundwater
County
—
System ID
MI0001370
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 3.90 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2005.
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 CHELSEA
Is CHELSEA water safe to drink?
CHELSEA water receives a grade of B (71/100), which is considered good. Out of 32 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CHELSEA detected?
32 contaminants were tested in CHELSEA's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does CHELSEA have any EPA violations?
Yes, CHELSEA has 5 EPA violation(s) on record, with the most recent in 2005. Violation types include Other, TT, MCL. 4 are health-based violations.
How many people does CHELSEA serve?
CHELSEA serves approximately 5,474 people, Michigan. The system provides water to 1 community: Chelsea.
What type of water does CHELSEA provide?
CHELSEA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MI0001370.
How does CHELSEA compare to other utilities in Michigan?
CHELSEA scores 71/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Michigan state page for a full comparison of water systems.