ST CHARLES, MO · St. Charles County
ST CHARLES PWS Water System
Consumer Confidence Report status
ST CHARLES PWS must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for ST CHARLES PWS.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.
System facts
- System ID (PWSID)
- MO6010707
- System type
- Community Water System
- Population served
- 78,961
- Service connections
- 27,427
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
ST CHARLES PWS is among the 10 largest community water systems in Missouri, serving 78,961 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 2012 and 2024, all of which EPA lists as closed.
Of the 2, 1 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Lead and Copper Rule and the Consumer Confidence Rule.
Violation history
Lead Consumer Notice
—Lead and Copper Rule
October 1, 2024 – April 2, 2025
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
July 1, 2012 – May 5, 2014
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2024 – April 2, 2025 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| July 1, 2012 – May 5, 2014 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Common questions
Is ST CHARLES PWS required to publish a Consumer Confidence Report?
- Yes. ST CHARLES PWS is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is ST CHARLES PWS’s next Consumer Confidence Report due?
- ST CHARLES PWS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does ST CHARLES PWS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for ST CHARLES PWS.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
ZACKAVEC, MAURA
636-949-3239
ST CHARLES, MO 63301-0000