Is NILES required to publish a Consumer Confidence Report?

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

NILES’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.

NILES, IL · Cook County

NILES Water System

Consumer Confidence Report status

NILES 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 NILES 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): IL0312010
System type: Community Water System
Population served: 29,350
Service connections: 8,870
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

NILES is one of 225 community water systems in Illinois in the 10,001 to 100,000 people size category, serving 29,350 people from surface water.

As of August 1, 2026, its federal record holds 5 entries between 1994 and 2025, of which 1 remains open; none are health-based.

Of the 5, 1 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 Total Coliform Rules and the Consumer Confidence Rule.

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2025
Unaddressed
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2015 – July 6, 2016
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2014 – August 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1998 – August 31, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 1994 – June 30, 1994
Archived

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, 2015 – July 6, 2016	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
August 1, 2014 – August 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 1998 – August 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
June 1, 1994 – June 30, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived

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
October 14, 2014State Public Notification received1 linked violation
September 22, 2014State Compliance achieved5 linked violations
September 15, 2014State Violation/Reminder Notice2 linked violations
October 15, 1998State Violation/Reminder Notice1 linked violation
October 15, 1998State Public Notification requested1 linked violation
December 24, 1996State Public Notification received1 linked violation
October 31, 1996State Public Notification received1 linked violation
October 19, 1996State Public Notification requested1 linked violation
October 19, 1996State Violation/Reminder Notice1 linked violation
August 20, 1994State Violation/Reminder Notice1 linked violation
August 20, 1994State Public Notification requested1 linked violation

Common questions

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

QUINN, STEPHEN

847-588-7900

NILES, IL 60714