THAYER, MO · Oregon County
THAYER PWS Water System
Consumer Confidence Report status
THAYER 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 1 item for THAYER PWS that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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)
- MO4010788
- System type
- Community Water System
- Population served
- 2,200
- Service connections
- 925
- Ownership
- local government
- Water source
- groundwater (wells)
THAYER PWS is one of 489 community water systems in Missouri in the 501 to 3,300 people size category, serving 2,200 people from groundwater.
As of August 1, 2026, its federal record holds 9 entries between 1994 and 2025, of which 1 remains open; none are health-based.
Of the 9, 5 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 Consumer Confidence Rule, the Total Coliform Rules, and the Lead and Copper Rule.
Violation history
Notification, Known or Potential LSL
—LEAD AND COPPER RULE REVISIONS
July 2, 2025
UnaddressedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
July 1, 2025 – November 25, 2025
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2023 – November 1, 2023
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2022 – November 30, 2022
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
May 1, 2014 – May 31, 2014
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
August 1, 2011 – August 31, 2011
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2006 – June 28, 2007
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
April 1, 2002 – April 30, 2002
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
July 1, 1994 – July 31, 1994
Resolved
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 2, 2025 | Notification, Known or Potential LSL | LEAD AND COPPER RULE REVISIONS | — | Unaddressed |
| July 1, 2025 – November 25, 2025 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| July 1, 2023 – November 1, 2023 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| July 1, 2022 – November 30, 2022 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| May 1, 2014 – May 31, 2014 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| August 1, 2011 – August 31, 2011 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 2006 – June 28, 2007 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| April 1, 2002 – April 30, 2002 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 1994 – July 31, 1994 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
Enforcement actions
- November 25, 2025State Formal Notice of Violation issued1 linked violation
- November 25, 2025State Compliance achieved1 linked violation
- November 1, 2023State Compliance achieved3 linked violations
- September 22, 2011State Public Notification requested5 linked violations
- July 2, 2002State Public Notification received41 linked violations
- June 6, 2002State Violation/Reminder Notice11 linked violations
Common questions
Is THAYER PWS required to publish a Consumer Confidence Report?
- Yes. THAYER 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 THAYER PWS’s next Consumer Confidence Report due?
- THAYER PWS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does THAYER PWS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 1 item for THAYER PWS that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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
MARTIN, DONNA
417-264-3921
THAYER, MO 65791-0000