A95/100
JEFFERSON COUNTY PWSD 12 — Water Quality Report 2026
Serving 3,000 people · Missouri
Water Source
Groundwater
County
—
System ID
MO6024304
Violations
2
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
No violations in the past 5 years
Full EPA compliance since 2014.
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 12
Is JEFFERSON COUNTY PWSD 12 water safe to drink?
JEFFERSON COUNTY PWSD 12 water receives a grade of A (95/100), 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 JEFFERSON COUNTY PWSD 12 detected?
1 contaminants were tested in JEFFERSON COUNTY PWSD 12's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does JEFFERSON COUNTY PWSD 12 have any EPA violations?
Yes, JEFFERSON COUNTY PWSD 12 has 2 EPA violation(s) on record, with the most recent in 2014. Violation types include MR.
How many people does JEFFERSON COUNTY PWSD 12 serve?
JEFFERSON COUNTY PWSD 12 serves approximately 3,000 people, Missouri.
What type of water does JEFFERSON COUNTY PWSD 12 provide?
JEFFERSON COUNTY PWSD 12 sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MO6024304.
How does JEFFERSON COUNTY PWSD 12 compare to other utilities in Missouri?
JEFFERSON COUNTY PWSD 12 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.