LAONA SANITARY DIST
Wisconsin - Community Water System - PWSID: WI7210108
System Information
| PWSID | WI7210108 |
| System Name | LAONA SANITARY DIST |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 28, 1981 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | Wisconsin |
| City | LAONA |
| ZIP Code | 54541 |
| Address | PO BOX 303 |
| Organization | LAONA SANITARY DISTRICT |
| Phone | - |
Population & Service
| Population Served | 950 |
| Service Connections | 442 |
Drinking Water Violations (231)
This water system has 231 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 16, 2025 | - | TT | Yes | No | - | - | - | Resolved | Dec 23, 2025 | - | |
| Oct 17, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 12, 2023 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 12, 2023 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 12, 2023 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 12, 2023 | - | |
| Sep 1, 2022 | Sep 30, 2022 | MON | No | No | - | - | - | Resolved | Sep 30, 2022 | - | |
| Sep 1, 2022 | Sep 30, 2022 | MON | No | No | - | - | - | Resolved | Sep 30, 2022 | - | |
| Sep 1, 2022 | Sep 30, 2022 | MON | No | No | - | - | - | Resolved | Sep 30, 2022 | - | |
| Sep 1, 2022 | Sep 30, 2022 | MON | No | No | - | - | - | Resolved | Sep 30, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Oct 18, 2022 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Oct 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Oct 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Oct 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Oct 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2011 | - | |
| Jul 1, 2009 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2009 | - | |
| Jul 1, 2009 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2009 | - | |
| Dec 1, 2008 | - | Other | No | No | - | - | - | Resolved | Feb 22, 2011 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | No | - | 4.0 mg/L | - | Resolved | Dec 1, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | No | - | 4.0 mg/L | - | Resolved | Dec 1, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | No | - | 4.0 mg/L | - | Resolved | Dec 1, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | No | - | 4.0 mg/L | - | Resolved | Dec 1, 2008 | - | |
| Oct 1, 2001 | Oct 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2001 | - | |
| Oct 1, 2001 | Oct 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2001 | - | |
| Oct 1, 2001 | Oct 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2001 | - | |
| Oct 1, 2001 | Oct 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2001 | - | |
| Oct 1, 2001 | Oct 31, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2001 | - |
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.