AZ0420531 · Arizona
CASITAS DE CASTILIAN
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 12
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 8
Counties listed by EPA · Pima County, Arizona
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 10 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 71.5 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, RegularViolation 9679 · Di(2-ethylhexyl) phthalate · Synthetic Organic ChemicalsNoncompliance period start October 1, 2025 · period end December 31, 2025 · first reported February 24, 2026 · EPA return-to-compliance field December 31, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4279 February 9, 2026 Informal State Violation/Reminder Notice 4280 February 9, 2026 Informal State Public Notification requested 4282 March 23, 2026 Resolving State Compliance achieved Monitoring or reporting · Unaddressed by formal action
Notification, Known or Potential LSLViolation 9678 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · first reported February 24, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4276 February 5, 2026 Informal State Violation/Reminder Notice 4277 February 5, 2026 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 9677 · Di(2-ethylhexyl) phthalate · Synthetic Organic ChemicalsNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported February 24, 2026 · EPA return-to-compliance field September 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4273 November 5, 2025 Informal State Violation/Reminder Notice 4274 November 5, 2025 Informal State Public Notification requested 4282 March 23, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Reporting, Assessment Forms (RTCR)Violation 9676 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start December 17, 2024 · period end December 16, 2024 · first reported February 24, 2026 · EPA return-to-compliance field December 16, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4271 December 16, 2024 Resolving State Compliance achieved 4268 February 18, 2025 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, Source Water (GWR)Violation 9675 · E. COLI · Ground Water RuleNoncompliance period start November 29, 2024 · period end January 9, 2025 · first reported February 24, 2026 · EPA return-to-compliance field January 9, 2025
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4264 December 18, 2024 Informal State Violation/Reminder Notice 4265 December 18, 2024 Informal State Public Notification requested 4267 January 9, 2025 Resolving State Compliance achieved 4272 June 30, 2025 Informal State Public Notification received Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 9674 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2024 · period end October 10, 2024 · first reported November 15, 2024 · EPA return-to-compliance field October 10, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4261 October 10, 2024 Informal State Violation/Reminder Notice 4263 October 10, 2024 Resolving State Compliance achieved EPA health-based flag · Resolved
Maximum Contaminant Level Violation, E. coli (RTCR)Violation 9673 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start July 1, 2023 · period end July 25, 2023 · first reported November 15, 2023 · EPA return-to-compliance field July 25, 2023
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4257 July 20, 2023 Informal State Public Notification received 4253 July 25, 2023 Informal State Boil Water Order 4255 July 25, 2023 Informal State Public Notification requested 4256 July 25, 2023 Resolving State Compliance achieved 4258 July 25, 2023 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 9671 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2022 · period end July 11, 2022 · first reported November 16, 2022 · EPA return-to-compliance field July 11, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4248 July 11, 2022 Resolving State Compliance achieved 4246 July 29, 2022 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Report Sample Result/Fail Monitor (RTCR)Violation 9670 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start March 1, 2022 · period end April 27, 2022 · first reported May 16, 2022 · EPA return-to-compliance field April 27, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4244 April 27, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Source Water (GWR)Violation 9669 · E. COLI · Ground Water RuleNoncompliance period start February 5, 2022 · period end April 27, 2022 · first reported May 16, 2022 · EPA return-to-compliance field April 27, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4239 March 25, 2022 Informal State Violation/Reminder Notice 4245 April 27, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 9668 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start October 1, 2021 · period end October 27, 2022 · first reported February 16, 2022 · EPA return-to-compliance field October 27, 2022
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4235 November 26, 2021 Informal State Violation/Reminder Notice 4236 November 26, 2021 Informal State Public Notification requested 4252 October 27, 2022 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 9667 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2021 · period end September 1, 2021 · first reported November 10, 2021 · EPA return-to-compliance field September 1, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4234 September 1, 2021 Resolving State Compliance achieved 4232 September 15, 2021 Informal State Violation/Reminder Notice
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