GRAYSLAKE
Illinois — Community Water System — PWSID: IL0970250
System Information
| PWSID | IL0970250 |
| System Name | GRAYSLAKE |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| 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 | GRAYSLAKE |
| ZIP Code | 60030 |
| Address | 10 SOUTH SEYMOUR AVENUE |
| Organization | RIGGS, PETER A. |
| Phone | 847-223-8515 |
Population & Service
| Population Served | 21,248 |
| Service Connections | 7,024 |
Drinking Water Violations (33)
This water system has 33 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, 2006 | Dec 31, 2006 | MR | No | No | — | TT | — | Resolved | Dec 31, 2006 | — | |
| Jul 1, 2006 | Dec 31, 2006 | MR | No | No | — | TT | — | Resolved | Dec 31, 2006 | — | |
| Sep 1, 2000 | Sep 30, 2000 | MCL | Yes | No | — | 5% of samples | — | Archived | Sep 30, 2000 | — | |
| Sep 1, 2000 | Sep 30, 2000 | MCL | Yes | No | — | 5% of samples | — | Archived | Sep 30, 2000 | — | |
| Jul 1, 2000 | Dec 31, 2000 | MR | No | No | — | TT | — | Resolved | Dec 31, 2000 | — | |
| Aug 1, 1999 | Aug 31, 1999 | MCL | Yes | No | — | 5% of samples | — | Archived | Aug 31, 1999 | — | |
| Aug 1, 1999 | Aug 31, 1999 | MCL | Yes | No | — | 5% of samples | — | Archived | Aug 31, 1999 | — | |
| Jul 1, 1997 | Dec 31, 1997 | MR | No | No | — | TT | — | Resolved | Dec 31, 1997 | — | |
| Dec 1, 1995 | Dec 31, 1995 | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1995 | — | |
| Dec 1, 1995 | Dec 31, 1995 | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1995 | — | |
| Dec 1, 1995 | Dec 31, 1995 | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1995 | — | |
| Jan 1, 1994 | — | TT | Yes | No | — | TT | — | Resolved | Mar 3, 1995 | — | |
| Jan 1, 1994 | — | TT | Yes | No | — | TT | — | Resolved | Mar 3, 1995 | — | |
| Dec 21, 1992 | — | TT | Yes | No | — | TT | — | Resolved | Jan 3, 1994 | — | |
| Dec 21, 1992 | — | TT | Yes | No | — | TT | — | Resolved | Jan 3, 1994 | — | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1992 | — | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1992 | — | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1992 | — | |
| Oct 1, 1991 | Oct 31, 1991 | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1991 | — | |
| Oct 1, 1991 | Oct 31, 1991 | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1991 | — | |
| Jun 30, 1977 | Jun 29, 1981 | MR | No | No | — | 15 pCi/L | — | Archived | Jun 29, 1981 | — | |
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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.