THORNTON, IL · Cook County
THORNTON Water System
Consumer Confidence Report status
THORNTON 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 THORNTON 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)
- IL0313090
- System type
- Community Water System
- Population served
- 2,386
- Service connections
- 988
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
THORNTON is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 2,386 people from surface water.
As of August 1, 2026, its federal record holds 4 entries between 1977 and 2025, of which 1 remains open; none are health-based.
Of the 4, 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 Inadequate Reporting
—Consumer Confidence Rule
July 1, 2025
UnaddressedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2022 – June 19, 2023
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2019 – July 25, 2019
ResolvedMonitoring, 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, 2022 – June 19, 2023 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| July 1, 2019 – July 25, 2019 | 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 |
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
No enforcement actions on record for this system.
Common questions
Is THORNTON required to publish a Consumer Confidence Report?
- Yes. THORNTON 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 THORNTON’s next Consumer Confidence Report due?
- THORNTON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does THORNTON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 1 item for THORNTON 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
PAYNE, VIVIAN
708-877-4456
THORNTON, IL 60476