TX0610068 · Texas
KNOB HILL WATER SYSTEM DENTON
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 11
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 1
- Monitoring and reporting records
- 5
Counties listed by EPA · Denton County, Texas
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 91 days. The interval uses the reporting periods and dates on file.
EPA health-based flag · Unaddressed by formal action
LSL InventoryViolation 428 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · first reported May 14, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110143 March 31, 2025 Informal State Violation/Reminder Notice 20110144 March 31, 2025 Informal State Public Notification requested 20110161 March 31, 2026 Informal State Public Notification received Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 437 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start January 4, 2026 · period end March 31, 2026 · first reported June 26, 2026 · EPA return-to-compliance field March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110153 January 28, 2026 Informal State Violation/Reminder Notice 20110155 March 31, 2026 Resolving State Compliance achieved Monitoring or reporting · Unaddressed by formal action
Follow-up Or Routine LCR Tap M/RViolation 435 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start October 1, 2025 · first reported March 31, 2026
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110151 November 13, 2025 Informal State Violation/Reminder Notice 20110152 November 13, 2025 Informal State Public Notification requested 20110159 March 31, 2026 Informal State Public Notification received Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 433 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start September 13, 2025 · period end March 31, 2026 · first reported January 6, 2026 · EPA return-to-compliance field March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110149 October 10, 2025 Informal State Violation/Reminder Notice 20110155 March 31, 2026 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 432 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start July 24, 2025 · period end March 31, 2026 · first reported October 1, 2025 · EPA return-to-compliance field March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110148 September 5, 2025 Informal State Violation/Reminder Notice 20110155 March 31, 2026 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Inadequate ReportingViolation 436 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · first reported March 31, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110154 December 31, 2025 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 431 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start June 30, 2025 · period end March 31, 2026 · first reported August 20, 2025 · EPA return-to-compliance field March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110147 July 28, 2025 Informal State Violation/Reminder Notice 20110155 March 31, 2026 Resolving State Compliance achieved Monitoring or reporting · Unaddressed by formal action
LSL ReportingViolation 429 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · first reported May 14, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110145 March 31, 2025 Informal State Violation/Reminder Notice 20110146 March 31, 2025 Informal State Public Notification requested 20110160 March 31, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 427 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2024 · period end September 30, 2024 · first reported June 26, 2026 · EPA return-to-compliance field September 30, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110140 January 2, 2025 Informal State Violation/Reminder Notice 20110141 January 2, 2025 Informal State Public Notification requested 20110142 March 10, 2025 Resolving State Compliance achieved 20110156 March 31, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 426 · Nitrite · Nitrate RuleNoncompliance period start April 1, 2024 · period end June 30, 2024 · first reported September 30, 2024 · EPA return-to-compliance field June 30, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110137 September 11, 2024 Informal State Violation/Reminder Notice 20110138 September 11, 2024 Informal State Public Notification requested 20110139 October 18, 2024 Resolving State Compliance achieved 20110157 March 31, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 425 · Nitrite · Nitrate RuleNoncompliance period start January 1, 2024 · period end March 31, 2024 · first reported July 23, 2024 · EPA return-to-compliance field March 31, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 20110135 July 22, 2024 Informal State Violation/Reminder Notice 20110136 July 22, 2024 Informal State Public Notification requested 20110139 October 18, 2024 Resolving State Compliance achieved 20110158 March 31, 2026 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