A95/100
JEFFERSON COUNTY PWSD 3 — Water Quality Report 2026
Serving 17,000 people · Missouri
Water Source
Purchased Surface Water
County
—
System ID
MO6024294
Violations
2
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 302.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2006.
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 JEFFERSON COUNTY PWSD 3
Is JEFFERSON COUNTY PWSD 3 water safe to drink?
JEFFERSON COUNTY PWSD 3 water receives a grade of A (95/100), 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 JEFFERSON COUNTY PWSD 3 detected?
69 contaminants were tested in JEFFERSON COUNTY PWSD 3's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does JEFFERSON COUNTY PWSD 3 have any EPA violations?
Yes, JEFFERSON COUNTY PWSD 3 has 2 EPA violation(s) on record, with the most recent in 2006. Violation types include Other, MR.
How many people does JEFFERSON COUNTY PWSD 3 serve?
JEFFERSON COUNTY PWSD 3 serves approximately 17,000 people, Missouri.
What type of water does JEFFERSON COUNTY PWSD 3 provide?
JEFFERSON COUNTY PWSD 3 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 MO6024294.
How does JEFFERSON COUNTY PWSD 3 compare to other utilities in Missouri?
JEFFERSON COUNTY PWSD 3 scores 95/100 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.