IL1110150 · Illinois
CRYSTAL LAKE
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 12
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 12
Counties listed by EPA · McHenry County, Illinois
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 12 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 89 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051208 · Methoxychlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239476 April 13, 2026 Informal State Violation/Reminder Notice 6239477 April 13, 2026 Informal State Public Notification requested 6239479 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051207 · Heptachlor epoxide · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239474 April 13, 2026 Informal State Violation/Reminder Notice 6239475 April 13, 2026 Informal State Public Notification requested 6239484 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051206 · Hexachlorocyclopentadiene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239472 April 13, 2026 Informal State Violation/Reminder Notice 6239473 April 13, 2026 Informal State Public Notification requested 6239482 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051205 · Heptachlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239470 April 13, 2026 Informal State Violation/Reminder Notice 6239471 April 13, 2026 Informal State Public Notification requested 6239478 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051204 · Endrin · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239468 April 13, 2026 Informal State Violation/Reminder Notice 6239469 April 13, 2026 Informal State Public Notification requested 6239485 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051201 · Di(2-ethylhexyl) adipate · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239462 April 13, 2026 Informal State Violation/Reminder Notice 6239463 April 13, 2026 Informal State Public Notification requested 6239488 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051200 · BHC-GAMMA · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239460 April 13, 2026 Informal State Violation/Reminder Notice 6239461 April 13, 2026 Informal State Public Notification requested 6239489 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051199 · Di(2-ethylhexyl) phthalate · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239458 April 13, 2026 Informal State Violation/Reminder Notice 6239459 April 13, 2026 Informal State Public Notification requested 6239487 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051198 · HEXACHLOROBENZENE · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239456 April 13, 2026 Informal State Violation/Reminder Notice 6239457 April 13, 2026 Informal State Public Notification requested 6239483 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051197 · LASSO · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239454 April 13, 2026 Informal State Violation/Reminder Notice 6239455 April 13, 2026 Informal State Public Notification requested 6239481 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051195 · Simazine · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239420 April 13, 2026 Informal State Violation/Reminder Notice 6239421 April 13, 2026 Informal State Public Notification requested 6239450 April 13, 2026 Informal State Violation/Reminder Notice 6239451 April 13, 2026 Informal State Public Notification requested 6239480 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7051194 · Atrazine · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6239448 April 13, 2026 Informal State Violation/Reminder Notice 6239449 April 13, 2026 Informal State Public Notification requested 6239491 June 8, 2026 Informal State Public Notification received 6239493 June 19, 2026 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