A90/100
CLAY COUNTY PWSD 4 — Water Quality Report 2026
Serving 1,032 people · Missouri
Water Source
Purchased Groundwater
County
—
System ID
MO1024144
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
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 CLAY COUNTY PWSD 4
Is CLAY COUNTY PWSD 4 water safe to drink?
CLAY COUNTY PWSD 4 water receives a grade of A (90/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CLAY COUNTY PWSD 4 detected?
1 contaminants were tested in CLAY COUNTY PWSD 4's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CLAY COUNTY PWSD 4 have any EPA violations?
Yes, CLAY COUNTY PWSD 4 has 3 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MCL, MR. 1 are health-based violations.
How many people does CLAY COUNTY PWSD 4 serve?
CLAY COUNTY PWSD 4 serves approximately 1,032 people, Missouri. The system provides water to 1 community: Liberty.
What type of water does CLAY COUNTY PWSD 4 provide?
CLAY COUNTY PWSD 4 sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MO1024144.
How does CLAY COUNTY PWSD 4 compare to other utilities in Missouri?
CLAY COUNTY PWSD 4 scores 90/100 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.