A84/100
MADISON SUBURBAN U.D. — Water Quality Report 2026
Serving 81,203 people · Tennessee
Water Source
Surface Water
County
—
System ID
TN0000424
Violations
9
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
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – August 10, 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 MADISON SUBURBAN U.D.
Is MADISON SUBURBAN U.D. water safe to drink?
MADISON SUBURBAN U.D. water receives a grade of A (84/100), 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 MADISON SUBURBAN U.D. detected?
69 contaminants were tested in MADISON SUBURBAN U.D.'s water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MADISON SUBURBAN U.D. have any EPA violations?
Yes, MADISON SUBURBAN U.D. has 9 EPA violation(s) on record, with the most recent in 2021. Violation types include Other, MR, MCL. 1 are health-based violations.
How many people does MADISON SUBURBAN U.D. serve?
MADISON SUBURBAN U.D. serves approximately 81,203 people, Tennessee. The system provides water to 1 community: Madison.
What type of water does MADISON SUBURBAN U.D. provide?
MADISON SUBURBAN U.D. sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is TN0000424.
How does MADISON SUBURBAN U.D. compare to other utilities in Tennessee?
MADISON SUBURBAN U.D. scores 84/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Tennessee state page for a full comparison of water systems.