SOMONAUK, IL · DeKalb County
SOMONAUK Water System
Consumer Confidence Report status
SOMONAUK 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 SOMONAUK.
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)
- IL0374870
- System type
- Community Water System
- Population served
- 1,860
- Service connections
- 741
- Ownership
- local government
- Water source
- groundwater (wells)
SOMONAUK is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 1,860 people from groundwater.
As of August 1, 2026, its federal record holds 3 entries between 1977 and 1995, all of which EPA lists as closed. Nothing has been added since 1995.
Of the 3, 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 Lead and Copper Rule and the Radionuclides and Revised Rad Rule.
Violation history
OCCT/SOWT Study/Recommendation
Health-basedLead and Copper Rule
August 1, 1995 – February 20, 1997
ResolvedOCCT/SOWT Study/Recommendation
Health-basedLead and Copper Rule
January 12, 1995 – February 20, 1997
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 |
|---|---|---|---|---|
| August 1, 1995 – February 20, 1997 | OCCT/SOWT Study/Recommendation | Lead and Copper Rule | Health-based | Resolved |
| January 12, 1995 – February 20, 1997 | OCCT/SOWT Study/Recommendation | Lead and Copper Rule | Health-based | 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
- July 16, 2007State Violation/Reminder Notice1 linked violation
- July 11, 2007State Compliance achieved1 linked violation
- February 20, 1997State Compliance achieved2 linked violations
- November 28, 1992State Violation/Reminder Notice1 linked violation
- November 28, 1992State Public Notification requested1 linked violation
- November 24, 1992State Public Notification received1 linked violation
Common questions
Is SOMONAUK required to publish a Consumer Confidence Report?
- Yes. SOMONAUK 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 SOMONAUK’s next Consumer Confidence Report due?
- SOMONAUK’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SOMONAUK have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SOMONAUK.
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
EIPERS, BEN P.
815-498-2056
SOMONAUK, IL 60552