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Willow Lake Estates Mhp

Published drinking-water records and contacts for Willow Lake Estates Mhp. System IL0894400. Review sources and dates; not a real-time water assessment.

System ID
IL0894400
State or territory
IL
Published population served
920
System type (source code)
CWS

Published records and dates

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
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2025-01-06Sample Station / SS001
4:2 FTS< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
6:2 FTS< 0.005 µg/L0.005 µg/L2025-01-06Sample Station / SS001
8:2 FTS< 0.005 µg/L0.005 µg/L2025-01-06Sample Station / SS001
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-01-06Sample Station / SS001
ADONA< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
HFPO-DA< 0.005 µg/L0.005 µg/L2025-01-06Sample Station / SS001
NEtFOSAA< 0.005 µg/L0.005 µg/L2025-01-06Sample Station / SS001
NFDHA< 0.02 µg/L0.02 µg/L2025-01-06Sample Station / SS001
NMeFOSAA< 0.006 µg/L0.006 µg/L2025-01-06Sample Station / SS001
PFBA< 0.005 µg/L0.005 µg/L2025-01-06Sample Station / SS001
PFBS< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFDA< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFDoA< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFEESA< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFHpA< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFHpS< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFHxA0.0033 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFHxS< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFMBA< 0.003 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFMPA< 0.004 µg/L0.004 µg/L2025-01-06Sample Station / SS001
PFNA< 0.004 µg/L0.004 µg/L2025-01-06Sample Station / SS001
PFOA< 0.004 µg/L0.004 µg/L2025-01-06Sample Station / SS001
PFOS< 0.004 µg/L0.004 µg/L2025-01-06Sample Station / SS001
PFPeA0.0040 µg/L0.003 µg/L2025-01-06Sample Station / SS001
PFPeS< 0.004 µg/L0.004 µg/L2025-01-06Sample Station / SS001
PFTA< 0.008 µg/L0.008 µg/L2025-01-06Sample Station / SS001
PFTrDA< 0.007 µg/L0.007 µg/L2025-01-06Sample Station / SS001
PFUnA< 0.002 µg/L0.002 µg/L2025-01-06Sample Station / SS001
lithium< 9 µg/L9 µg/L2024-12-04Sample Station / SS001

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
SubstancePublished 90th percentileMonitoring periodSource quarter
Lead (PB90) 0 mg/L2024-01-01 – 2026-12-312026Q3
Lead (PB90) 0 mg/L2022-01-01 – 2024-12-312026Q3
Lead (PB90) 0 mg/L2021-01-01 – 2023-12-312026Q3
Lead (PB90) 0 mg/L2020-01-01 – 2020-12-312026Q3
Lead (PB90) 0 mg/L2019-01-01 – 2019-12-312026Q3
Lead (PB90) 0 mg/L2018-01-01 – 2018-12-312026Q3
Lead (PB90) 0 mg/L2017-07-01 – 2017-12-312026Q3
Lead (PB90) 0 mg/L2017-01-01 – 2017-06-302026Q3

Published compliance history

15 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 / recordPeriodRecorded statusHealth-based (EPA classification)Source quarter
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2025-11-28 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2025-11-28 – —ResolvedNo2026Q3
Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation2025-08-22 – —ResolvedNo2026Q3
Lead and Copper Rule Revisions / Notification, Known or Potential LSL2025-07-02 – —ResolvedNo2026Q3
Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting2025-07-01 – —ResolvedNo2026Q3
Lead and Copper Rule Revisions / LSL Inventory2024-10-17 – —ResolvedYes2026Q3
Lead and Copper Rule Revisions / LSL Reporting2024-10-17 – —ResolvedNo2026Q3
Revised Total Coliform Rule / Monitoring, Routine (RTCR)2024-10-01 – 2024-10-31ResolvedNo2026Q3
Stage 1 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2024-10-01 – 2024-10-31ResolvedNo2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2024-10-01 – 2024-12-31ResolvedNo2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2024-10-01 – 2024-12-31ResolvedNo2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2023-07-01 – 2023-09-30ResolvedNo2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2023-07-01 – 2023-09-30ResolvedNo2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2020-07-01 – 2020-09-30ResolvedNo2026Q3
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2020-07-01 – 2020-09-30ResolvedNo2026Q3

Source dates and refresh checks

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

Administrative contact (EPA filing)

Boehl, Heather: 847-742-3620

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