Deerfield

Published drinking-water records and contacts for Deerfield. System IL0974340. Review sources and dates; not a real-time water assessment.

System ID: IL0974340
State or territory: IL
Published population served: 19196
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 120 — 2024-02-22 – 2024-11-05
Lead and copper monitoring summaries: 22 — 1992-04-01 – 2026-06-30

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
Substance	Published result	Reporting limit	Sample date	Sampling location
11Cl-PF3OUdS	< 0.005 µg/L	0.005 µg/L	2024-11-05	Highland Park Interconnection / CC01
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-11-05	Highland Park Interconnection / CC01
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-11-05	Highland Park Interconnection / CC01
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2024-11-05	Highland Park Interconnection / CC01
ADONA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2024-11-05	Highland Park Interconnection / CC01
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2024-11-05	Highland Park Interconnection / CC01
NFDHA	< 0.02 µg/L	0.02 µg/L	2024-11-05	Highland Park Interconnection / CC01
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFBA	< 0.005 µg/L	0.005 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFBS	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFDA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFDoA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFEESA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFHpA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFHpS	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFHxA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFHxS	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFMBA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFMPA	< 0.004 µg/L	0.004 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFNA	< 0.004 µg/L	0.004 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFOA	< 0.004 µg/L	0.004 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFOS	< 0.004 µg/L	0.004 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFPeA	< 0.003 µg/L	0.003 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFPeS	< 0.004 µg/L	0.004 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFTA	< 0.008 µg/L	0.008 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFTrDA	< 0.007 µg/L	0.007 µg/L	2024-11-05	Highland Park Interconnection / CC01
PFUnA	< 0.002 µg/L	0.002 µg/L	2024-11-05	Highland Park Interconnection / CC01
lithium	< 9 µg/L	9 µg/L	2024-11-05	Highland Park Interconnection / CC01

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
Substance	Published 90th percentile	Monitoring period	Source quarter
Lead (PB90)	0.0048 mg/L	2026-01-01 – 2026-06-30	2026Q3
Lead (PB90)	0.00618 mg/L	2025-07-01 – 2025-12-31	2026Q3
Lead (PB90)	0 mg/L	2025-01-01 – 2025-12-31	2026Q3
Lead (PB90)	0 mg/L	2025-01-01 – 2025-12-31	2026Q3
Lead (PB90)	0.0107 mg/L	2025-01-01 – 2025-06-30	2026Q3
Lead (PB90)	0 mg/L	2022-01-01 – 2024-12-31	2026Q3
Lead (PB90)	0 mg/L	2019-01-01 – 2021-12-31	2026Q3
Lead (PB90)	0 mg/L	2016-01-01 – 2018-12-31	2026Q3

Published compliance history

9 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / record	Period	Recorded status	Health-based (EPA classification)	Source quarter
Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R	2026-01-01 – —	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting	2025-07-01 – —	Unaddressed	No	2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)	2025-01-01 – 2025-03-31	Resolved	No	2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)	2025-01-01 – 2025-03-31	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting	2023-07-10 – —	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting	2022-07-01 – —	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report	2019-07-01 – —	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting	2018-07-01 – —	Resolved	No	2026Q3
Radionuclides and Revised Rad Rule / Monitoring, Regular	1977-06-30 – 1981-06-29	Archived	No	2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17

Administrative contact (EPA filing)

Phillips, Robert W.: 847-317-2490

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records