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MD0150003 · Maryland

CITY OF ROCKVILLE

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

Violation records shown: 16
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 16

Counties listed by EPA · Montgomery County, Maryland

Open the EPA system record

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

Violations and what followed

Among 16 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.

Monitoring or reporting · Resolved
Notification, Known or Potential LSLViolation 82 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions
Noncompliance period start July 2, 2025 · period end September 24, 2025 · first reported December 3, 2025 · EPA return-to-compliance field September 24, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
45 September 24, 2025 Resolving State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 80 · Chlordane · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 78 · Benzo(a)pyrene · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 77 · HEXACHLOROBENZENE · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 76 · Heptachlor epoxide · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 75 · Heptachlor · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 74 · LASSO · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 73 · Atrazine · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 72 · Hexachlorocyclopentadiene · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 71 · Di(2-ethylhexyl) phthalate · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 70 · Simazine · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 69 · Di(2-ethylhexyl) adipate · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 68 · Toxaphene · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 67 · Methoxychlor · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 66 · BHC-GAMMA · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 65 · Endrin · Synthetic Organic Chemicals

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported May 17, 2024 · 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
43	October 20, 2023	Resolving	State Compliance achieved
41	March 29, 2024	Informal	State Violation/Reminder Notice
42	March 29, 2024	Informal	State Public Notification requested
44	July 3, 2024	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