TX0610040 · Texas

BLACK ROCK WSC

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

Violation records shown: 43
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 42

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 3 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90 days. The interval uses the reporting periods and dates on file.

Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 356 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2025 · period end March 9, 2026 · first reported March 31, 2026 · EPA return-to-compliance field March 9, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
447 January 21, 2026 Informal State Violation/Reminder Notice
448 March 9, 2026 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
447	January 21, 2026	Informal	State Violation/Reminder Notice
448	March 9, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 320 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start September 1, 2023 · period end September 30, 2023 · first reported November 13, 2023 · EPA return-to-compliance field September 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
435	October 30, 2023	Informal	State Violation/Reminder Notice
436	October 30, 2023	Informal	State Public Notification requested
437	November 16, 2023	Resolving	State Compliance achieved
446	June 12, 2024	Informal	State Public Notification received

Monitoring or reporting · Archived
Monitoring, RegularViolation 347 · CYANIDE · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2023 · first reported May 16, 2024 · EPA return-to-compliance field December 31, 2023
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 344 · Fluoride · Inorganic Chemicals
Noncompliance period start January 1, 2021 · period end December 31, 2023 · first reported May 16, 2024 · EPA return-to-compliance field December 31, 2023
No linked action row appears in the records shown.

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 215 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start January 1, 2021 · period end April 1, 2021 · first reported May 17, 2021 · EPA return-to-compliance field April 1, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
412	March 19, 2021	Informal	State Violation/Reminder Notice
413	March 19, 2021	Informal	State Public Notification requested
414	April 1, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Archived
Monitoring, RegularViolation 296 · Chlordane · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 295 · Pentachlorophenol · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 294 · Benzo(a)pyrene · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 293 · HEXACHLOROBENZENE · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 292 · Heptachlor epoxide · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 291 · Heptachlor · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 290 · LASSO · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 289 · Atrazine · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 288 · Hexachlorocyclopentadiene · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 287 · Di(2-ethylhexyl) phthalate · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 286 · Simazine · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 285 · Di(2-ethylhexyl) adipate · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 284 · Toxaphene · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 283 · Methoxychlor · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 282 · BHC-GAMMA · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 281 · Endrin · Synthetic Organic Chemicals
Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported March 29, 2023 · EPA return-to-compliance field December 31, 2022
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 269 · 2,4,5-TP · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 268 · 2,4-D · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 267 · Dinoseb · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 266 · Picloram · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 265 · Dalapon · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 263 · Selenium · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 261 · Thallium, Total · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 260 · Beryllium, Total · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 259 · Antimony, Total · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 257 · Mercury · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 254 · Chromium · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 253 · Cadmium · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 252 · Barium · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 251 · Arsenic · Arsenic Rule
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 249 · ETHYLENE DIBROMIDE · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 248 · 1,2-DIBROMO-3-CHLOROPROPANE · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 247 · Aldicarb · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 246 · Carbofuran · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 245 · Aldicarb sulfone · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 244 · Aldicarb sulfoxide · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 243 · OXAMYL · Synthetic Organic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 240 · Fluoride · Inorganic Chemicals
Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported March 31, 2022 · EPA return-to-compliance field December 31, 2021
No linked action row appears in the records shown.

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