B69/100
MILLSBORO WATER DEPARTMENT — Water Quality Report 2026
Serving 8,568 people · Delaware
Water Source
Groundwater
County
—
System ID
DE0000622
Violations
8
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.96 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.007 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 16, 2024 – June 26, 2025Rule: Ground Water RuleEnforcement: 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 MILLSBORO WATER DEPARTMENT
Is MILLSBORO WATER DEPARTMENT water safe to drink?
MILLSBORO WATER DEPARTMENT water receives a grade of B (69/100), which is considered good. Out of 32 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MILLSBORO WATER DEPARTMENT detected?
32 contaminants were tested in MILLSBORO WATER DEPARTMENT's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does MILLSBORO WATER DEPARTMENT have any EPA violations?
Yes, MILLSBORO WATER DEPARTMENT has 8 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, Other, MCL. 3 are health-based violations.
How many people does MILLSBORO WATER DEPARTMENT serve?
MILLSBORO WATER DEPARTMENT serves approximately 8,568 people, Delaware. The system provides water to 1 community: Millsboro.
What type of water does MILLSBORO WATER DEPARTMENT provide?
MILLSBORO WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is DE0000622.
How does MILLSBORO WATER DEPARTMENT compare to other utilities in Delaware?
MILLSBORO WATER DEPARTMENT scores 69/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Delaware state page for a full comparison of water systems.