A87/100
MALLORY VALLEY U.D. — Water Quality Report 2026
Serving 30,347 people · Tennessee
Water Source
Purchased Surface Water
County
—
System ID
TN0000428
Violations
6
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 11, 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 MALLORY VALLEY U.D.
Is MALLORY VALLEY U.D. water safe to drink?
MALLORY VALLEY U.D. water receives a grade of A (87/100), 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 MALLORY VALLEY U.D. detected?
69 contaminants were tested in MALLORY VALLEY U.D.'s water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MALLORY VALLEY U.D. have any EPA violations?
Yes, MALLORY VALLEY U.D. has 6 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 MALLORY VALLEY U.D. serve?
MALLORY VALLEY U.D. serves approximately 30,347 people, Tennessee.
What type of water does MALLORY VALLEY U.D. provide?
MALLORY VALLEY U.D. 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 TN0000428.
How does MALLORY VALLEY U.D. compare to other utilities in Tennessee?
MALLORY VALLEY U.D. scores 87/100 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.