KNAPP WATERWORKS
Wisconsin - Community Water System - PWSID: WI6170267
System Information
| PWSID | WI6170267 |
| System Name | KNAPP WATERWORKS |
| 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 | Knapp |
| ZIP Code | 54749 |
| Address | 111 Oak Street |
| Organization | KNAPP VILLAGE CLERK |
| Phone | - |
Population & Service
| Population Served | 486 |
| Service Connections | 229 |
Drinking Water Violations (83)
This water system has 83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 2, 2025 | - | TT | Yes | No | - | - | - | Resolved | Dec 3, 2025 | - | |
| Sep 2, 2025 | - | TT | Yes | No | - | - | - | Resolved | Dec 3, 2025 | - | |
| Apr 1, 2024 | Apr 30, 2024 | MON | No | No | - | - | - | Resolved | Apr 30, 2024 | - | |
| Apr 1, 2024 | Apr 30, 2024 | MON | No | No | - | - | - | Resolved | Apr 30, 2024 | - | |
| Apr 1, 2024 | Apr 30, 2024 | MON | No | No | - | - | - | Resolved | Apr 30, 2024 | - | |
| Apr 1, 2024 | Apr 30, 2024 | MON | No | No | - | - | - | Resolved | Apr 30, 2024 | - | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | No | - | - | - | Resolved | Aug 31, 2023 | - | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | No | - | - | - | Resolved | Aug 31, 2023 | - | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | No | - | - | - | Resolved | Aug 31, 2023 | - | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | No | - | - | - | Resolved | Aug 31, 2023 | - | |
| Feb 1, 2023 | Feb 28, 2023 | MON | No | No | - | - | - | Resolved | Feb 28, 2023 | - | |
| Feb 1, 2023 | Feb 28, 2023 | MON | No | No | - | - | - | Resolved | Feb 28, 2023 | - | |
| Feb 1, 2023 | Feb 28, 2023 | MON | No | No | - | - | - | Resolved | Feb 28, 2023 | - | |
| Feb 1, 2023 | Feb 28, 2023 | MON | No | No | - | - | - | Resolved | Feb 28, 2023 | - | |
| Sep 9, 2022 | - | MR | No | Yes | - | - | - | Resolved | Sep 15, 2022 | - | |
| Sep 9, 2022 | - | MR | No | Yes | - | - | - | Resolved | Sep 15, 2022 | - | |
| Sep 9, 2022 | - | MR | No | Yes | - | - | - | Resolved | Sep 15, 2022 | - | |
| Sep 9, 2022 | - | MR | No | Yes | - | - | - | Resolved | Sep 15, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.060 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | Dec 31, 2022 | MR | No | No | - | 0.080 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2018 | - | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2018 | - | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2018 | - | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2018 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2017 | - | |
| Jan 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Jul 13, 2017 | - | |
| Jan 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Jul 13, 2017 | - | |
| Jun 1, 2016 | - | MR | No | No | - | TT | - | Resolved | Aug 7, 2017 | - | |
| Jun 1, 2016 | - | MR | No | No | - | TT | - | Resolved | Aug 7, 2017 | - | |
| Jun 1, 2016 | - | MR | No | No | - | TT | - | Resolved | Aug 7, 2017 | - | |
| Jun 1, 2016 | - | MR | No | No | - | TT | - | Resolved | Aug 7, 2017 | - | |
| Oct 1, 2013 | Oct 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2013 | - | |
| Oct 1, 2013 | Oct 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2013 | - | |
| Oct 1, 2013 | Oct 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 6, 2013 | - | |
| Oct 1, 2013 | Oct 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 6, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 6, 2013 | - | |
| Oct 1, 2013 | Dec 31, 2013 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 6, 2013 | - | |
| May 1, 2012 | May 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2012 | - |
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.