NORTHBROOK, IL · Cook County

MISSION BROOK SD Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)

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 Violation/Reminder Notice1 linked violation
July 2, 2025State Public Notification requested3 linked violations
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
January 23, 1991State Public Notification received1 linked violation
September 2, 1989State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
January 29, 1987State Compliance achieved2 linked violations

Contact

GARDNER, KENNETH

847-509-5335

NORTHBROOK, IL 60065