C58/100
COLLIERVILLE WATER DEPT — Water Quality Report 2026
Serving 51,972 people · Tennessee
Water Source
Groundwater
County
—
System ID
TN0000126
Violations
31
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
2
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Disinfection byproduct treatment technique failure
TIER 3Resolved
Surface water treatment technique failure
When: October 1, 2021 – October 1, 2022Enforcement: 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 COLLIERVILLE WATER DEPT
Is COLLIERVILLE WATER DEPT water safe to drink?
COLLIERVILLE WATER DEPT water receives a grade of C (58/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 31 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has COLLIERVILLE WATER DEPT detected?
66 contaminants were tested in COLLIERVILLE WATER DEPT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does COLLIERVILLE WATER DEPT have any EPA violations?
Yes, COLLIERVILLE WATER DEPT has 31 EPA violation(s) on record, with the most recent in 2021. Violation types include Other, MR, MCL. 2 are health-based violations.
How many people does COLLIERVILLE WATER DEPT serve?
COLLIERVILLE WATER DEPT serves approximately 51,972 people, Tennessee. The system provides water to 1 community: Collierville.
What type of water does COLLIERVILLE WATER DEPT provide?
COLLIERVILLE WATER DEPT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is TN0000126.
How does COLLIERVILLE WATER DEPT compare to other utilities in Tennessee?
COLLIERVILLE WATER DEPT scores 58/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Tennessee state page for a full comparison of water systems.