WINNETKA, IL · Cook County
WINNETKA Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)
- IL0313330
- System type
- Community Water System
- Population served
- 12,475
- Service connections
- 4,477
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
Violation history
Consumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2010 – July 20, 2010
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
December 1, 2006 – December 31, 2006
ResolvedMonitoring and Reporting (DBP)
—Chlorine
October 1, 2006 – December 31, 2006
ResolvedMonitoring, Regular
—Fluoride
June 25, 1979 – June 24, 1980
ArchivedMonitoring, Regular
—Mercury
June 25, 1979 – June 24, 1980
ArchivedMonitoring, Regular
—Arsenic
June 25, 1979 – June 24, 1980
ArchivedMonitoring, Regular
—Selenium
June 25, 1979 – June 24, 1980
ArchivedMonitoring, Regular
—Nitrate
June 25, 1979 – June 24, 1980
ArchivedMonitoring, Regular
—Cadmium
June 25, 1979 – June 24, 1980
ArchivedMonitoring, Regular
—Chromium
June 25, 1979 – June 24, 1980
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 |
|---|---|---|---|---|
| July 1, 2010 – July 20, 2010 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| December 1, 2006 – December 31, 2006 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| October 1, 2006 – December 31, 2006 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| June 25, 1979 – June 24, 1980 | Monitoring, Regular | Fluoride | — | Archived |
| June 25, 1979 – June 24, 1980 | Monitoring, Regular | Mercury | — | Archived |
| June 25, 1979 – June 24, 1980 | Monitoring, Regular | Arsenic | — | Archived |
| June 25, 1979 – June 24, 1980 | Monitoring, Regular | Selenium | — | Archived |
| June 25, 1979 – June 24, 1980 | Monitoring, Regular | Nitrate | — | Archived |
| June 25, 1979 – June 24, 1980 | Monitoring, Regular | Cadmium | — | Archived |
| June 25, 1979 – June 24, 1980 | Monitoring, Regular | Chromium | — | 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 1, 2007State Compliance achieved4 linked violations
Contact
NARHI, NICHOLAS
847-716-3556
WINNETKA, IL 60093