A84/100
MOUNT VERNON PWS — Water Quality Report 2026
Serving 4,575 people · Missouri
Water Source
Groundwater
County
—
System ID
MO5010553
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
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 MOUNT VERNON PWS
Is MOUNT VERNON PWS water safe to drink?
MOUNT VERNON PWS water receives a grade of A (84/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MOUNT VERNON PWS detected?
31 contaminants were tested in MOUNT VERNON PWS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MOUNT VERNON PWS have any EPA violations?
Yes, MOUNT VERNON PWS has 5 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL. 2 are health-based violations.
How many people does MOUNT VERNON PWS serve?
MOUNT VERNON PWS serves approximately 4,575 people, Missouri. The system provides water to 1 community: Mount Vernon.
What type of water does MOUNT VERNON PWS provide?
MOUNT VERNON PWS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MO5010553.
How does MOUNT VERNON PWS compare to other utilities in Missouri?
MOUNT VERNON PWS scores 84/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Missouri state page for a full comparison of water systems.