Is DUPO required to publish a Consumer Confidence Report?

Yes. DUPO 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 DUPO’s next Consumer Confidence Report due?

DUPO’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.

DUPO, IL · St. Clair County

DUPO Water System

Consumer Confidence Report status

DUPO 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 DUPO.

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 Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID): IL1630350
System type: Community Water System
Population served: 4,684
Service connections: 2,165
Ownership: local government
Water source: groundwater (wells)

DUPO is one of 248 community water systems in Illinois in the 3,301 to 10,000 people size category, serving 4,684 people from groundwater.

As of August 1, 2026, its federal record holds 4 entries between 1998 and 2024, all of which EPA lists as closed.

Of the 4, 2 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 and the Total Coliform Rules.

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – October 28, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – August 5, 2019
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
March 1, 1998 – March 31, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 1998 – February 28, 1998
Archived

Resolved 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 1, 2024 – October 28, 2024	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2019 – August 5, 2019	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 1, 1998 – March 31, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
February 1, 1998 – February 28, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

October 4, 2024State Violation/Reminder Notice2 linked violations
August 5, 2019State Compliance achieved1 linked violation
July 17, 2019State Violation/Reminder Notice1 linked violation
May 30, 1998State Public Notification requested1 linked violation
May 30, 1998State Violation/Reminder Notice1 linked violation
April 30, 1998State Violation/Reminder Notice1 linked violation
April 30, 1998State Public Notification requested1 linked violation

Common questions

Is DUPO required to publish a Consumer Confidence Report?: Yes. DUPO 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 DUPO’s next Consumer Confidence Report due?: DUPO’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does DUPO have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for DUPO.
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

BASINSKI, JOE

618-779-0300

DUPO, IL 62239