GLENVIEW, IL · Knox County
AQUA ILLINOIS-OAK RUN Water System
Consumer Confidence Report status
AQUA ILLINOIS-OAK RUN 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 AQUA ILLINOIS-OAK RUN.
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)
- IL0955200
- System type
- Community Water System
- Population served
- 1,885
- Service connections
- 754
- Ownership
- privately owned
- Water source
- groundwater (wells)
AQUA ILLINOIS-OAK RUN is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 1,885 people from groundwater.
As of August 1, 2026, its federal record holds 4 entries between 1977 and 1995, all of which EPA lists as closed. Nothing has been added since 1995.
Of the 4, 2 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
—Nitrate
January 1, 1995 – December 31, 1995
ResolvedMaximum Contaminant Level Violation, Average
Health-basedFluoride
January 1, 1984 – November 14, 1985
ResolvedMaximum Contaminant Level Violation, Average
Health-basedFluoride
January 1, 1981 – December 31, 1983
ArchivedMonitoring, 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 |
|---|---|---|---|---|
| January 1, 1995 – December 31, 1995 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 1984 – November 14, 1985 | Maximum Contaminant Level Violation, Average | Fluoride | Health-based | Resolved |
| January 1, 1981 – December 31, 1983 | Maximum Contaminant Level Violation, Average | Fluoride | Health-based | Archived |
| 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 2, 1996State Compliance achieved1 linked violation
- February 6, 1996State Violation/Reminder Notice1 linked violation
- February 6, 1996State Public Notification requested1 linked violation
- October 13, 1991State Violation/Reminder Notice1 linked violation
- October 13, 1991State Public Notification requested1 linked violation
Common questions
Is AQUA ILLINOIS-OAK RUN required to publish a Consumer Confidence Report?
- Yes. AQUA ILLINOIS-OAK RUN 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 AQUA ILLINOIS-OAK RUN’s next Consumer Confidence Report due?
- AQUA ILLINOIS-OAK RUN’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does AQUA ILLINOIS-OAK RUN have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for AQUA ILLINOIS-OAK RUN.
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
MACK, JENNIFER
224-602-6779
GLENVIEW, IL 60025