ST JOHNS NORTHWESTERN ACADEMIES
Wisconsin - Community Water System - PWSID: WI2680761
System Information
| PWSID | WI2680761 |
| System Name | ST JOHNS NORTHWESTERN ACADEMIES |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 05 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Jan 28, 1981 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | Wisconsin |
| City | DELAFIELD |
| ZIP Code | 53018 |
| Address | 1101 GENESEE ST |
| Organization | OEFFLING, JIM - DIRECTOR OF FACILITIES |
| Phone | - |
Population & Service
| Population Served | 340 |
| Service Connections | 12 |
Drinking Water Violations (222)
This water system has 222 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 17, 2024 | - | RPT | No | No | - | - | - | Resolved | Mar 6, 2025 | - | |
| Oct 17, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Resolved | Mar 6, 2025 | - | |
| Oct 17, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Apr 1, 2022 | Jun 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2022 | - | |
| Apr 1, 2022 | Jun 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2022 | - | |
| Apr 1, 2022 | Jun 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2022 | - | |
| Apr 1, 2022 | Jun 30, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2022 | - | |
| Mar 1, 2022 | Mar 31, 2022 | MON | No | Yes | - | - | - | Archived | Mar 31, 2022 | - | |
| Jan 1, 2022 | Jan 31, 2022 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2022 | - | |
| Jan 1, 2022 | Jan 31, 2022 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2022 | - | |
| Jan 1, 2022 | Jan 31, 2022 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2022 | - | |
| Jan 1, 2022 | Jan 31, 2022 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2022 | - | |
| Jan 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Feb 25, 2022 | - | |
| Jan 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Feb 25, 2022 | - | |
| Dec 2, 2021 | - | TT | Yes | No | - | - | - | Resolved | Feb 18, 2022 | - | |
| Dec 2, 2021 | - | TT | Yes | No | - | - | - | Resolved | Feb 18, 2022 | - | |
| Dec 1, 2021 | Dec 31, 2021 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2021 | - | |
| Dec 1, 2021 | Dec 31, 2021 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2021 | - | |
| Dec 1, 2021 | Dec 31, 2021 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2021 | - | |
| Dec 1, 2021 | Dec 31, 2021 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2021 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2021 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2021 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2021 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2021 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2017 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 20, 2015 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Jul 20, 2015 | - | |
| Jan 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Mar 17, 2014 | - | |
| Jan 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Mar 17, 2014 | - | |
| Oct 1, 2013 | - | Other | No | No | - | - | - | Resolved | Apr 2, 2014 | - | |
| Oct 1, 2013 | - | Other | No | No | - | - | - | Resolved | Apr 2, 2014 | - | |
| Jan 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Sep 19, 2013 | - | |
| Jan 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Sep 19, 2013 | - | |
| Oct 1, 2012 | - | Other | No | No | - | - | - | Resolved | Apr 2, 2014 | - | |
| Oct 1, 2012 | - | Other | No | No | - | - | - | Resolved | Apr 2, 2014 | - | |
| Oct 1, 2010 | - | Other | No | No | - | - | - | Resolved | Mar 16, 2011 | - | |
| Oct 1, 2010 | - | Other | No | No | - | - | - | Resolved | Mar 16, 2011 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Mar 15, 2011 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Mar 15, 2011 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Mar 31, 2010 | - | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Mar 31, 2010 | - |
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.