Is NORTHBROOK required to publish a Consumer Confidence Report?

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

NORTHBROOK’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.

NORTHBROOK, IL · Cook County

NORTHBROOK Water System

Consumer Confidence Report status

NORTHBROOK 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 NORTHBROOK.

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): IL0312070
System type: Community Water System
Population served: 34,407
Service connections: 12,740
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

NORTHBROOK is one of 225 community water systems in Illinois in the 10,001 to 100,000 people size category, serving 34,407 people from surface water.

As of August 1, 2026, its federal record holds 4 entries between 1993 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 4, 3 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 Stage 2 Disinfectants and Disinfection Byproducts Rule, and the Total Coliform Rules.

Violation history

Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2023 – September 30, 2023
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2020 – January 15, 2021
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 2003 – December 31, 2003
Resolved
Public Education
Health-based
Lead and Copper Rule
January 1, 1993 – February 5, 1994
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2023 – September 30, 2023	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
December 30, 2020 – January 15, 2021	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
December 1, 2003 – December 31, 2003	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1993 – February 5, 1994	Public Education	Lead and Copper Rule	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

May 13, 2024State Public Notification received1 linked violation
November 28, 2023State Compliance achieved1 linked violation
October 11, 2023State Violation/Reminder Notice1 linked violation
October 11, 2023State Public Notification requested1 linked violation
January 15, 2021State Compliance achieved1 linked violation
January 6, 2021State Violation/Reminder Notice1 linked violation
June 4, 2004State Public Notification received3 linked violations
February 5, 1994State Compliance achieved1 linked violation
February 5, 1994State Compliance achieved1 linked violation
April 5, 1993State Public Notification requested1 linked violation
April 5, 1993State Violation/Reminder Notice1 linked violation

Common questions

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

RIZZO, JOSEPH

847-664-4139

NORTHBROOK, IL 60062