Lake Zurich

Published drinking-water records and contacts for Lake Zurich. System IL0970850. Review sources and dates; not a real-time water assessment.

System ID: IL0970850
State or territory: IL
Published population served: 19759
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 300 — 2023-06-20 – 2024-09-23
Lead and copper monitoring summaries: 23 — 1992-04-01 – 2025-12-31

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	2024-09-20	TP 7 (Well 12) / TP07
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-09-20	TP 7 (Well 12) / TP07
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-09-20	TP 7 (Well 12) / TP07
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2024-09-20	TP 7 (Well 12) / TP07
ADONA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2024-09-20	TP 7 (Well 12) / TP07
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2024-09-23	TP 7 (Well 12) / TP07
NFDHA	< 0.02 µg/L	0.02 µg/L	2024-09-20	TP 7 (Well 12) / TP07
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2024-09-23	TP 7 (Well 12) / TP07
PFBA	< 0.005 µg/L	0.005 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFBS	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFDA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFDoA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFEESA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFHpA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFHpS	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFHxA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFHxS	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFMBA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFMPA	< 0.004 µg/L	0.004 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFNA	< 0.004 µg/L	0.004 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFOA	< 0.004 µg/L	0.004 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFOS	< 0.004 µg/L	0.004 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFPeA	< 0.003 µg/L	0.003 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFPeS	< 0.004 µg/L	0.004 µg/L	2024-09-20	TP 7 (Well 12) / TP07
PFTA	< 0.008 µg/L	0.008 µg/L	2024-09-23	TP 7 (Well 12) / TP07
PFTrDA	< 0.007 µg/L	0.007 µg/L	2024-09-23	TP 7 (Well 12) / TP07
PFUnA	< 0.002 µg/L	0.002 µg/L	2024-09-20	TP 7 (Well 12) / TP07
lithium	21.4 µg/L	9 µg/L	2024-09-23	TP 7 (Well 12) / TP07

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)	0.00467 mg/L	2025-01-01 – 2025-12-31	2026Q3
Lead (PB90)	0.00274 mg/L	2025-01-01 – 2025-12-31	2026Q3
Lead (PB90)	0.00688 mg/L	2025-07-01 – 2025-12-31	2026Q3
Lead (PB90)	0.0105 mg/L	2025-01-01 – 2025-06-30	2026Q3
Lead (PB90)	0.003 mg/L	2020-01-01 – 2022-12-31	2026Q3
Lead (PB90)	0.00394 mg/L	2019-01-01 – 2019-12-31	2026Q3
Lead (PB90)	0.00916 mg/L	2018-01-01 – 2018-12-31	2026Q3
Lead (PB90)	0.00673 mg/L	2017-07-01 – 2017-12-31	2026Q3

Published compliance history

3 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
Radionuclides and Revised Rad Rule / Monitoring, Regular	2023-10-01 – 2023-12-31	Resolved	No	2026Q3
Radionuclides and Revised Rad Rule / Monitoring, Regular	2023-01-01 – 2023-12-31	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)

Schmitt, Steven: 847-540-1696

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