Is OAK LAWN required to publish a Consumer Confidence Report?

Yes. OAK LAWN 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 OAK LAWN’s next Consumer Confidence Report due?

OAK LAWN’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.

OAK LAWN, IL · Cook County

OAK LAWN Water System

Consumer Confidence Report status

OAK LAWN 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 OAK LAWN 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): IL0312220
System type: Community Water System
Population served: 58,362
Service connections: 16,766
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

OAK LAWN is among the 23 largest community water systems in Illinois, serving 58,362 people from surface water.

As of August 1, 2026, its federal record holds 8 entries between 1992 and 2025, of which 1 remains open; none are health-based.

Of the 8, 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 Consumer Confidence Rule, the Lead and Copper Rule, and the Total Coliform Rules.

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2025
Unaddressed
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2023 – May 17, 2024
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2022 – January 3, 2023
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2016 – June 23, 2017
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2015 – September 30, 2015
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2015 – September 30, 2015
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
August 1, 1997 – August 31, 1997
Archived
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
December 7, 1992 – January 18, 1994
Resolved

Unaddressed no corrective action on record yetResolved 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
July 1, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Unaddressed
July 1, 2023 – May 17, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
December 30, 2022 – January 3, 2023	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2016 – June 23, 2017	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
September 1, 2015 – September 30, 2015	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2015 – September 30, 2015	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
August 1, 1997 – August 31, 1997	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
December 7, 1992 – January 18, 1994	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved

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

Enforcement actions

September 6, 2025State Violation/Reminder Notice1 linked violation
May 17, 2024State Compliance achieved1 linked violation
December 19, 2023State Violation/Reminder Notice1 linked violation
January 24, 2023State Violation/Reminder Notice1 linked violation
January 3, 2023State Compliance achieved1 linked violation
June 23, 2017State Compliance achieved1 linked violation
July 21, 2016State Violation/Reminder Notice1 linked violation
June 20, 2016State Public Notification received1 linked violation
June 20, 2016State Public Notification received1 linked violation
November 2, 2015State Compliance achieved2 linked violations
October 20, 2015State Violation/Reminder Notice1 linked violation
October 20, 2015State Violation/Reminder Notice1 linked violation
October 20, 2015State Public Notification requested1 linked violation
October 20, 2015State Public Notification requested3 linked violations
December 5, 2000State Violation/Reminder Notice17 linked violations
October 25, 1997State Public Notification requested1 linked violation
October 25, 1997State Violation/Reminder Notice1 linked violation
February 5, 1995State Compliance achieved1 linked violation
March 24, 1994State Public Notification requested1 linked violation
March 24, 1994State Public Notification requested2 linked violations
March 24, 1994State Violation/Reminder Notice1 linked violation
January 18, 1994State Compliance achieved1 linked violation
May 8, 1990State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
March 11, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
March 11, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
October 9, 1988State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record

Common questions

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

MEYER, WILLIAM

708-499-7749

OAK LAWN, IL 60453