ID7190013 · Idaho

CHALLIS CITY OF

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

Violation records shown: 20
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 20

Counties listed by EPA · Custer County, Idaho

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

Violations and what followed

Among 11 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.

Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 21126 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start June 1, 2026 · period end June 30, 2026 · first reported September 28, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, Turbidity (Enhanced SWTR)Violation 21123 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Noncompliance period start June 1, 2026 · period end June 30, 2026 · first reported September 28, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 21122 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start June 1, 2026 · period end June 30, 2026 · first reported September 28, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 21121 · Surface Water Treatment Rule · Surface Water Treatment Rule
Noncompliance period start June 1, 2026 · period end June 30, 2026 · first reported September 28, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 21120 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start June 1, 2026 · period end June 30, 2026 · first reported September 28, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 21127 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start May 1, 2026 · period end May 31, 2026 · first reported September 28, 2026 · EPA return-to-compliance field May 31, 2026
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 21128 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start April 1, 2026 · period end April 30, 2026 · first reported September 28, 2026 · EPA return-to-compliance field April 30, 2026
No linked action row appears in the records shown.

Monitoring or reporting · Unaddressed by formal action

Follow-up Or Routine LCR Tap M/RViolation 21081 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start January 1, 2026 · first reported June 26, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191225	February 24, 2026	Informal	State Violation/Reminder Notice
191226	February 27, 2026	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 20963 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start September 1, 2024 · period end September 30, 2024 · first reported December 4, 2024 · EPA return-to-compliance field September 30, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191200	October 16, 2024	Resolving	State Compliance achieved
191195	November 14, 2024	Informal	State Violation/Reminder Notice
191196	November 17, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 20953 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start July 1, 2024 · period end July 31, 2024 · first reported December 4, 2024 · EPA return-to-compliance field July 31, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191192	September 5, 2024	Informal	State Violation/Reminder Notice
191193	September 8, 2024	Informal	State Public Notification requested
191194	September 18, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 20935 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2023 · period end November 14, 2023 · first reported February 28, 2024 · EPA return-to-compliance field November 14, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191199	November 14, 2023	Resolving	State Compliance achieved
191186	February 12, 2024	Informal	State Violation/Reminder Notice
191187	February 15, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 20933 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start October 1, 2023 · period end October 31, 2023 · first reported February 28, 2024 · EPA return-to-compliance field October 31, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191227	November 13, 2023	Resolving	State Compliance achieved
191184	December 5, 2023	Informal	State Violation/Reminder Notice
191185	December 8, 2023	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 20932 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start October 1, 2023 · period end October 31, 2023 · first reported February 28, 2024 · EPA return-to-compliance field October 31, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191199	November 14, 2023	Resolving	State Compliance achieved
191182	December 5, 2023	Informal	State Violation/Reminder Notice
191183	December 8, 2023	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 20808 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2022 · period end September 30, 2022 · first reported December 6, 2022 · EPA return-to-compliance field September 30, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191165	November 8, 2022	Informal	State Violation/Reminder Notice
191166	November 11, 2022	Informal	State Public Notification requested
191178	February 21, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 20801 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start May 1, 2022 · period end May 31, 2022 · first reported September 2, 2022 · EPA return-to-compliance field May 31, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191161	July 6, 2022	Informal	State Violation/Reminder Notice
191162	July 9, 2022	Informal	State Public Notification requested
191181	February 21, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 20800 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start May 1, 2022 · period end May 31, 2022 · first reported September 2, 2022 · EPA return-to-compliance field May 31, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191163	July 6, 2022	Informal	State Violation/Reminder Notice
191164	July 9, 2022	Informal	State Public Notification requested
191180	February 21, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 20798 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported September 2, 2022 · EPA return-to-compliance field June 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191157	July 6, 2022	Informal	State Violation/Reminder Notice
191158	July 9, 2022	Informal	State Public Notification requested
191175	February 21, 2023	Resolving	State Compliance achieved
191176	February 21, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Archived

Monitoring and Reporting (DBP)Violation 20768 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported August 24, 2021 · EPA return-to-compliance field June 30, 2021

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191153	August 2, 2021	Informal	State Violation/Reminder Notice
191154	August 5, 2021	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 20765 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported August 24, 2021 · EPA return-to-compliance field June 30, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191149	July 9, 2021	Informal	State Violation/Reminder Notice
191150	July 12, 2021	Informal	State Public Notification requested
191171	February 21, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 20724 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2020 · period end February 26, 2021 · first reported December 2, 2020 · EPA return-to-compliance field February 26, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
191136	August 6, 2020	Informal	State Violation/Reminder Notice
191137	August 9, 2020	Informal	State Public Notification requested
191146	February 26, 2021	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