Is WILMETTE required to publish a Consumer Confidence Report?

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

WILMETTE’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.

WILMETTE, IL · Cook County

WILMETTE Water System

Consumer Confidence Report status

WILMETTE 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 no open violations for WILMETTE.

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): IL0313300
System type: Community Water System
Population served: 27,087
Service connections: 9,030
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

WILMETTE is one of 225 community water systems in Illinois in the 10,001 to 100,000 people size category, serving 27,087 people from surface water.

As of August 1, 2026, its federal record holds 4 entries between 1977 and 1979, all of which EPA lists as closed. Nothing has been added since 1979.

All 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 inorganic chemicals and the Radionuclides and Revised Rad Rule.

Violation history

Monitoring, Regular
—
Arsenic
June 25, 1979 – June 24, 1980
Archived
Monitoring, Regular
—
Fluoride
June 25, 1979 – June 24, 1980
Archived
Monitoring, Regular
—
Mercury
June 25, 1979 – June 24, 1980
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

Archived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
June 25, 1979 – June 24, 1980	Monitoring, Regular	Arsenic	—	Archived
June 25, 1979 – June 24, 1980	Monitoring, Regular	Fluoride	—	Archived
June 25, 1979 – June 24, 1980	Monitoring, Regular	Mercury	—	Archived
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

January 13, 2026State Violation/Reminder Notice4 linked violations
September 18, 1994State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
September 18, 1994State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 27, 1994State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
February 27, 1994State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 30, 1989State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
December 30, 1989State Public Notification requested1 linked violation

Common questions

Is WILMETTE required to publish a Consumer Confidence Report?: Yes. WILMETTE 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 WILMETTE’s next Consumer Confidence Report due?: WILMETTE’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does WILMETTE have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for WILMETTE.
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

QUAFISHEH, NABIL

847-853-7531

WILMETTE, IL 60091