WI6170267 · Wisconsin
KNAPP WATERWORKS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 7
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 6
Counties listed by EPA · Dunn County, Wisconsin
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 7 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 30 days. The interval uses the reporting periods and dates on file.
EPA health-based flag · Resolved
Treatment Technique No Certif. OperatorViolation 2500048 · Stage 1 Disinfectants and Disinfection Byproducts Rule · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start September 2, 2025 · period end December 3, 2025 · first reported December 17, 2025 · EPA return-to-compliance field December 3, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500175 September 10, 2025 Informal State Violation/Reminder Notice 2600177 December 3, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2400030 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start April 1, 2024 · period end April 30, 2024 · first reported August 28, 2025 · EPA return-to-compliance field April 30, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400169 May 6, 2024 Informal State Violation/Reminder Notice 2400170 May 6, 2024 Informal State Public Notification requested 2400171 May 14, 2024 Resolving State Compliance achieved 2400172 May 20, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2300029 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start August 1, 2023 · period end August 31, 2023 · first reported August 28, 2025 · EPA return-to-compliance field August 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300165 September 12, 2023 Resolving State Compliance achieved 2300166 September 18, 2023 Informal State Violation/Reminder Notice 2300167 September 18, 2023 Informal State Public Notification requested 2400173 March 22, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2300028 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start February 1, 2023 · period end February 28, 2023 · first reported August 28, 2025 · EPA return-to-compliance field February 28, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300159 March 2, 2023 Informal State Violation/Reminder Notice 2300160 March 2, 2023 Informal State Public Notification requested 2300161 March 7, 2023 Resolving State Compliance achieved 2400168 March 22, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Source Water (GWR)Violation 2200025 · E. COLI · Ground Water RuleNoncompliance period start September 9, 2022 · period end September 15, 2022 · first reported August 28, 2025 · EPA return-to-compliance field September 15, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2200154 September 13, 2022 Informal State Violation/Reminder Notice 2200155 September 13, 2022 Informal State Public Notification requested 2200156 September 15, 2022 Resolving State Compliance achieved 2300163 May 23, 2023 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2300027 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 1, 2023 · EPA return-to-compliance field December 31, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300157 October 28, 2022 Informal State Violation/Reminder Notice 2300158 October 28, 2022 Informal State Public Notification requested 2300162 May 23, 2023 Informal State Public Notification received 2300164 August 29, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2300026 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 1, 2023 · EPA return-to-compliance field December 31, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300157 October 28, 2022 Informal State Violation/Reminder Notice 2300158 October 28, 2022 Informal State Public Notification requested 2300162 May 23, 2023 Informal State Public Notification received 2300164 August 29, 2023 Resolving State Compliance achieved
EPA data and scope
How to read the records
The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.
- We matched active community water systems by public water system ID between EPA’s system search and SDWIS inventory. We show violations with a recorded noncompliance, initial reporting or return-to-compliance date from 2021 onward, plus earlier records listed as Addressed or Unaddressed.
- EPA’s health-based flag identifies violations of contaminant or disinfectant limits or treatment requirements. Monitoring and reporting violations describe required tests or reports. Neither category measures household exposure.
- Addressed means EPA records formal enforcement on a violation that remains unresolved in the snapshot. Unaddressed means no formal action is recorded for an unresolved violation. Resolved can mean compliance was restored, the rule ceased to apply, or further action was unnecessary. Archived is a separate status.
- We count a violation once per water system and group its distinct linked actions. Conflicting records are set aside. Places are EPA-listed search locations and can include mailing locations. Use the provider name and system ID to identify your service.
EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility