DEERFIELD, IL · Lake County

DEERFIELD Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID): IL0974340
System type: Community Water System
Population served: 19,196
Service connections: 6,281
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2025
Unaddressed
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2025 – March 31, 2025
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2025 – March 31, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 10, 2023 – July 1, 2024
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2022 – July 1, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – July 19, 2019
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2018 – July 19, 2019
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2014 – June 29, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2005 – June 14, 2006
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
December 7, 1992 – December 28, 1993
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Unaddressed
January 1, 2025 – March 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2025 – March 31, 2025	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 10, 2023 – July 1, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2022 – July 1, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2019 – July 19, 2019	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2018 – July 19, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2014 – June 29, 2015	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
August 1, 2013 – August 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2013 – August 31, 2013	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2005 – June 14, 2006	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
December 7, 1992 – December 28, 1993	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

December 28, 1993State Compliance achieved1 linked violation

Contact

PHILLIPS, ROBERT W.

847-317-2490

DEERFIELD, IL 60015