Is LISLE required to publish a Consumer Confidence Report?

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

LISLE’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.

LISLE, IL · DuPage County

LISLE Water System

Consumer Confidence Report status

LISLE 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 LISLE 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): IL0430551
System type: Community Water System
Population served: 24,223
Service connections: 6,129
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

LISLE is one of 225 community water systems in Illinois in the 10,001 to 100,000 people size category, serving 24,223 people from surface water.

As of August 1, 2026, its federal record holds 6 entries between 1977 and 2025, of which 1 remains open; none are health-based.

Of the 6, 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 Consumer Confidence Rule, the Total Coliform Rules, and the Radionuclides and Revised Rad 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, 2021 – October 28, 2021
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2012 – July 8, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2011 – August 31, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2006 – June 30, 2006
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
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, 2021 – October 28, 2021	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2012 – July 8, 2013	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
August 1, 2011 – August 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 2006 – June 30, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	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

October 22, 2021State Violation/Reminder Notice2 linked violations
October 3, 2011State Compliance achieved2 linked violations
September 13, 2011State Violation/Reminder Notice5 linked violations
January 1, 2007State Compliance achieved3 linked violations
April 3, 1992State Violation/Reminder Notice1 linked violation
April 3, 1992State Public Notification requested1 linked violation
April 2, 1992State Public Notification received1 linked violation
January 6, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 6, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record

Common questions

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

ELIAS, JASON

630-271-4180

LISLE, IL 60532