SYLVAN LAKE 1ST SUBDIVISION
Illinois — Community Water System — PWSID: IL0977100
System Information
| PWSID | IL0977100 |
| System Name | SYLVAN LAKE 1ST SUBDIVISION |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1981 |
| Last Reported | Feb 26, 2026 |
Location & Contact
| State | Illinois |
| City | MUNDELEIN |
| ZIP Code | 60060 |
| Address | 21496 W Sylvan Dr |
| Organization | JOHNSON, WAYNE |
| Phone | 224-280-0188 |
Population & Service
| Population Served | 210 |
| Service Connections | 71 |
Drinking Water Violations (75)
This water system has 75 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 2, 2025 | — | RPT | No | No | — | — | — | Unaddressed | — | — | |
| Jul 2, 2025 | — | RPT | No | No | — | — | — | Unaddressed | — | — | |
| Jul 1, 2025 | — | MR | No | No | — | TT | — | Unaddressed | — | — | |
| Jul 1, 2025 | — | MR | No | No | — | TT | — | Unaddressed | — | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Apr 30, 2025 | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Apr 30, 2025 | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Apr 30, 2025 | — | |
| Oct 1, 2024 | — | MR | No | No | — | TT | — | Unaddressed | — | — | |
| Oct 1, 2024 | — | MR | No | No | — | TT | — | Unaddressed | — | — | |
| Oct 1, 2024 | — | MR | No | No | — | TT | — | Unaddressed | — | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2024 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.006 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.004 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.05 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 2 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | — | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 4.0 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 4.0 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 2 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.05 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.006 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.004 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | — | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 5 pCi/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 5 pCi/L | — | Archived | Dec 31, 2025 | — | |
| Jul 1, 2009 | — | Other | No | No | — | — | — | Resolved | Jul 10, 2009 | — | |
| Jul 1, 2009 | — | Other | No | No | — | — | — | Resolved | Jul 10, 2009 | — | |
| Nov 9, 2003 | — | Other | No | No | — | — | — | Resolved | Nov 10, 2003 | — | |
| Nov 9, 2003 | — | Other | No | No | — | — | — | Resolved | Nov 10, 2003 | — | |
| Oct 1, 2003 | Oct 31, 2003 | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 2003 | — | |
| Oct 1, 2003 | Oct 31, 2003 | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 2003 | — | |
| Oct 1, 2003 | Oct 31, 2003 | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 2003 | — | |
| Aug 1, 2003 | Aug 31, 2003 | MCL | Yes | No | — | 5% of samples | — | Archived | Aug 31, 2003 | — | |
| Aug 1, 2003 | Aug 31, 2003 | MCL | Yes | No | — | 5% of samples | — | Archived | Aug 31, 2003 | — | |
| Aug 1, 2003 | Aug 31, 2003 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 2003 | — |
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.