A85/100
ST CHARLES COUNTY PWSD 2 — Water Quality Report 2026
Serving 100,587 people · Missouri
Water Source
Purchased Surface Water
County
—
System ID
MO6024530
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 408.00 µg/L | — | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Violation related to Consumer Confidence Report
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 1, 2025 – June 30, 2025Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 1, 2021 – June 30, 2021Rule: Total Coliform RuleEnforcement: 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 ST CHARLES COUNTY PWSD 2
Is ST CHARLES COUNTY PWSD 2 water safe to drink?
ST CHARLES COUNTY PWSD 2 water receives a grade of A (85/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ST CHARLES COUNTY PWSD 2 detected?
76 contaminants were tested in ST CHARLES COUNTY PWSD 2's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ST CHARLES COUNTY PWSD 2 have any EPA violations?
Yes, ST CHARLES COUNTY PWSD 2 has 4 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MON, MCL. 2 are health-based violations.
How many people does ST CHARLES COUNTY PWSD 2 serve?
ST CHARLES COUNTY PWSD 2 serves approximately 100,587 people, Missouri.
What type of water does ST CHARLES COUNTY PWSD 2 provide?
ST CHARLES COUNTY PWSD 2 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 MO6024530.
How does ST CHARLES COUNTY PWSD 2 compare to other utilities in Missouri?
ST CHARLES COUNTY PWSD 2 scores 85/100 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.