Is PORTAGE DES SIOUX PWS required to publish a Consumer Confidence Report?

Yes. PORTAGE DES SIOUX 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 PORTAGE DES SIOUX PWS’s next Consumer Confidence Report due?

PORTAGE DES SIOUX PWS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

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.

PORTAGE DES SIOUX, MO · St. Charles County

PORTAGE DES SIOUX PWS Water System

Consumer Confidence Report status

PORTAGE DES SIOUX 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 PORTAGE DES SIOUX 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): MO6010657
System type: Community Water System
Population served: 345
Service connections: 165
Ownership: local government
Water source: groundwater (wells)

PORTAGE DES SIOUX PWS is one of 1,412 community water systems in Missouri in the 500 or fewer people size category, serving 345 people from groundwater.

As of August 1, 2026, its federal record holds 17 entries between 1993 and 2025, of which 1 remains open; none are health-based.

Of the 17, 11 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 Total Coliform Rules, the Consumer Confidence Rule, and the Lead and Copper Rule.

Violation history

Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025
Unaddressed
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2019 – November 26, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2019 – April 30, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2016 – June 30, 2016
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 7, 2016 – September 9, 2019
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
October 24, 2015 – February 4, 2019
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 2014 – June 30, 2014
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2013 – September 2, 2014
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 2013 – June 30, 2013
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
March 1, 2013 – March 31, 2013
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 2010 – December 31, 2010
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2010 – November 30, 2010
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2010 – September 30, 2010
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1996 – May 31, 1996
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1995 – September 30, 1995
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1993 – November 30, 1993
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1993 – September 30, 1993
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 2, 2025	Notification, Known or Potential LSL	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
July 1, 2019 – November 26, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
April 1, 2019 – April 30, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
June 1, 2016 – June 30, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 7, 2016 – September 9, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 24, 2015 – February 4, 2019	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
June 1, 2014 – June 30, 2014	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2013 – September 2, 2014	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
June 1, 2013 – June 30, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
March 1, 2013 – March 31, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
December 1, 2010 – December 31, 2010	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 2010 – November 30, 2010	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2010 – September 30, 2010	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
May 1, 1996 – May 31, 1996	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 1995 – September 30, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
November 1, 1993 – November 30, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 1993 – September 30, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is PORTAGE DES SIOUX PWS required to publish a Consumer Confidence Report?: Yes. PORTAGE DES SIOUX 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 PORTAGE DES SIOUX PWS’s next Consumer Confidence Report due?: PORTAGE DES SIOUX PWS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does PORTAGE DES SIOUX PWS have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 item for PORTAGE DES SIOUX 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

WARNER, MARK D

636-899-0640

PORTAGE DES SIOUX, MO 63373-0000