WINNETKA
Illinois — Community Water System — PWSID: IL0313330
System Information
| PWSID | IL0313330 |
| System Name | WINNETKA |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1981 |
| Last Reported | Feb 26, 2026 |
Location & Contact
| State | Illinois |
| City | WINNETKA |
| ZIP Code | 60093 |
| Address | 510 GREEN BAY ROAD |
| Organization | NARHI, NICHOLAS |
| Phone | 847-716-3556 |
Population & Service
| Population Served | 12,475 |
| Service Connections | 4,477 |
Drinking Water Violations (31)
This water system has 31 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2010 | — | Other | No | No | — | — | — | Resolved | Jul 20, 2010 | — | |
| Jul 1, 2010 | — | Other | No | No | — | — | — | Resolved | Jul 20, 2010 | — | |
| Dec 1, 2006 | Dec 31, 2006 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2006 | — | |
| Dec 1, 2006 | Dec 31, 2006 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2006 | — | |
| Oct 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2006 | — | |
| Oct 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2006 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 2 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 10 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 0.05 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 4.0 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 25, 1979 | Jun 24, 1980 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Jun 24, 1980 | — | |
| Jun 30, 1977 | Jun 29, 1981 | MR | No | No | — | 15 pCi/L | — | Archived | Jun 29, 1981 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.