Is ONARGA required to publish a Consumer Confidence Report?

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

ONARGA’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.

ONARGA, IL · Iroquois County

ONARGA Water System

Consumer Confidence Report status

ONARGA 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 ONARGA.

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): IL0750700
System type: Community Water System
Population served: 1,409
Service connections: 500
Ownership: local government
Water source: groundwater (wells)

ONARGA is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 1,409 people from groundwater.

As of August 1, 2026, its federal record holds 5 entries between 1994 and 2024, all of which EPA lists as closed.

Of the 5, 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 Public Notice Rule and Revised PN Rule, the Total Coliform Rules, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
October 16, 2024 – December 3, 2024
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 16, 2024 – December 3, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2023 – August 31, 2023
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2023 – September 25, 2023
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
January 1, 1994 – January 25, 1995
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 16, 2024 – December 3, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 16, 2024 – December 3, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
August 1, 2023 – August 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2023 – September 25, 2023	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 1994 – January 25, 1995	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

December 9, 2024State Public Notification received1 linked violation
December 9, 2024State Public Notification received1 linked violation
December 3, 2024State Compliance achieved1 linked violation
December 3, 2024State Compliance achieved1 linked violation
November 19, 2024State Violation/Reminder Notice1 linked violation
November 19, 2024State Violation/Reminder Notice1 linked violation
October 16, 2023State Violation/Reminder Notice1 linked violation
October 16, 2023State Violation/Reminder Notice1 linked violation
October 16, 2023State Public Notification requested1 linked violation
October 16, 2023State Public Notification requested1 linked violation
September 25, 2023State Compliance achieved1 linked violation
September 11, 2023State Compliance achieved1 linked violation
October 14, 2022State Public Notification received1 linked violation
February 15, 2022State Compliance achieved1 linked violation
January 19, 2022State Violation/Reminder Notice1 linked violation
January 19, 2022State Public Notification requested1 linked violation
July 21, 2020State Violation/Reminder Notice1 linked violation
July 17, 2020State Compliance achieved1 linked violation
January 25, 1995State Compliance achieved1 linked violation

Common questions

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

HAMILTON, TIM

815-268-7311

ONARGA, IL 60955