Is MARENGO required to publish a Consumer Confidence Report?

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

MARENGO’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.

MARENGO, IL · McHenry County

MARENGO Water System

Consumer Confidence Report status

MARENGO 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 MARENGO.

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): IL1110650
System type: Community Water System
Population served: 7,572
Service connections: 2,810
Ownership: local government
Water source: groundwater (wells)

MARENGO is one of 248 community water systems in Illinois in the 3,301 to 10,000 people size category, serving 7,572 people from groundwater.

As of August 1, 2026, its federal record holds 5 entries between 1977 and 2009, all of which EPA lists as closed. Nothing has been added since 2009.

Of the 5, 4 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, the Total Coliform Rules, and the Radionuclides and Revised Rad Rule.

Violation history

Lead Consumer Notice
—
Lead and Copper Rule
October 1, 2009 – December 18, 2009
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2000 – June 1, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 1998 – November 30, 1998
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 1992 – November 30, 1992
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
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
October 1, 2009 – December 18, 2009	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 1, 2000 – June 1, 2001	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
November 1, 1998 – November 30, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
November 1, 1992 – November 30, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

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

Enforcement actions

February 17, 2026State Public Notification received2 linked violations
February 13, 2026State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 9, 2026State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 9, 2026State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 18, 2009State Compliance achieved1 linked violation
October 5, 2009State Violation/Reminder Notice1 linked violation
January 15, 1999State Public Notification requested1 linked violation
January 15, 1999State Violation/Reminder Notice1 linked violation
January 9, 1993State Violation/Reminder Notice1 linked violation
January 9, 1993State Public Notification requested1 linked violation

Common questions

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

PROFFITT, MICHAEL

815-568-7112

MARENGO, IL 60152