IA4652011 · Iowa

OTTOSEN WATER SUPPLY

Federal fiscal 2026Q3 · EPA violation and follow-up records

Violation records shown: 2
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 2

Counties listed by EPA · Humboldt County, Iowa

Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.

Violations and what followed

Among 2 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 196.5 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 50521 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start November 1, 2020 · period end November 30, 2020 · first reported March 11, 2021 · EPA return-to-compliance field November 30, 2020

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
877204	December 9, 2020	Resolving	State Compliance achieved
877202	December 16, 2020	Informal	State Public Notification requested
877203	December 16, 2020	Informal	State Formal Notice of Violation issued
877206	March 17, 2021	Informal	State Public Notification received
877207	March 17, 2021	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 8522 · Nitrate · Nitrate Rule

Noncompliance period start October 1, 2020 · period end September 30, 2021 · first reported December 8, 2021 · EPA return-to-compliance field September 30, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
877209	October 19, 2021	Informal	State Formal Notice of Violation issued
877210	October 19, 2021	Informal	State Public Notification requested
877211	November 30, 2021	Resolving	State Compliance achieved
877212	January 21, 2022	Informal	State Public Notification received

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