DARIEN, IL · DuPage County
DARIEN Water System
Consumer Confidence Report status
DARIEN 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 DARIEN.
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)
- IL0430270
- System type
- Community Water System
- Population served
- 21,751
- Service connections
- 8,944
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
DARIEN is one of 225 community water systems in Illinois in the 10,001 to 100,000 people size category, serving 21,751 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 1977 and 2024, all of which EPA lists as closed.
Of the 2, 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 and the Radionuclides and Revised Rad Rule.
Violation history
Consumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2024 – July 18, 2024
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived
Resolved 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, 2024 – July 18, 2024 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| June 30, 1977 – June 29, 1981 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- October 1, 1988State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
Common questions
Is DARIEN required to publish a Consumer Confidence Report?
- Yes. DARIEN 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 DARIEN’s next Consumer Confidence Report due?
- DARIEN’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does DARIEN have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for DARIEN.
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
GOMBAC, DANIEL
630-353-8106
DARIEN, IL 60561