Is MISSION BROOK SD required to publish a Consumer Confidence Report?

Yes. MISSION BROOK SD 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 MISSION BROOK SD’s next Consumer Confidence Report due?

MISSION BROOK SD’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

MISSION BROOK SD Water System

Consumer Confidence Report status

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

System facts

System ID (PWSID): IL0315920
System type: Community Water System
Population served: 2,852
Service connections: 525
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

MISSION BROOK SD is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 2,852 people from surface water.

As of August 1, 2026, its federal record holds 10 entries between 1977 and 2025, of which 1 remains open; none are health-based.

Of the 10, 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 Radionuclides and Revised Rad Rule, the Lead and Copper Rule, and the Total Coliform Rules.

Violation history

Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025 – December 18, 2025
Resolved
LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Unaddressed
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1996 – November 30, 1996
Archived
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
December 1, 1994 – January 1, 1996
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
December 21, 1990 – December 20, 1994
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 1, 1988 – February 3, 1989
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
February 1, 1985 – January 29, 1987
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 14, 1984 – September 13, 1988
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
February 2, 1981 – February 1, 1985
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
July 2, 2025 – December 18, 2025	Notification, Known or Potential LSL	LEAD AND COPPER RULE REVISIONS	—	Resolved
October 17, 2024	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
November 1, 1996 – November 30, 1996	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
December 1, 1994 – January 1, 1996	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
December 21, 1990 – December 20, 1994	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
September 1, 1988 – February 3, 1989	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
February 1, 1985 – January 29, 1987	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
September 14, 1984 – September 13, 1988	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
February 2, 1981 – February 1, 1985	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

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

Enforcement actions

December 18, 2025State Compliance achieved2 linked violations
July 3, 2025State Violation/Reminder Notice1 linked violation
July 3, 2025State Public Notification requested1 linked violation
July 2, 2025State Public Notification requested3 linked violations
July 2, 2025State Violation/Reminder Notice1 linked violation
January 18, 1997State Violation/Reminder Notice1 linked violation
January 18, 1997State Public Notification requested1 linked violation
January 8, 1997State Public Notification received1 linked violation
February 8, 1996State Compliance achieved2 linked violations
March 2, 1993State Intentional no-action2 linked violations
September 14, 1992State Public Notification received1 linked violation
August 24, 1992State Public Notification requested1 linked violation
June 3, 1992State Public Notification received1 linked violation
May 7, 1992State Public Notification requested1 linked violation
December 27, 1991State Public Notification requested1 linked violation
July 23, 1991State Public Notification requested1 linked violation
March 14, 1991State Hook-up/Extension Ban1 linked violation
January 23, 1991State Public Notification received1 linked violation
February 3, 1989State Compliance achieved3 linked violations
January 29, 1987State Compliance achieved2 linked violations

Common questions

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

GARDNER, KENNETH

847-509-5335

NORTHBROOK, IL 60065