Crest Hill
Published drinking-water records and contacts for Crest Hill. System IL1970250. Review sources and dates; not a real-time water assessment.
- System ID
- IL1970250
- State or territory
- IL
- Published population served
- 21169
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 420 — 2023-06-12 – 2023-12-28
- Lead and copper monitoring summaries: 31 — 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.
Read the provider’s annual water quality report
Report link listed: 2026-10-08. This is not the report’s sampling date.
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
| Substance | Published result | Reporting limit | Sample date | Sampling location |
|---|---|---|---|---|
| 11Cl-PF3OUdS | < 0.005 µg/L | 0.005 µg/L | 2023-12-28 | TP 1 (Well 1) / TP01 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2023-12-28 | TP 3 (Well 4) / TP03 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2023-12-28 | TP 7 (Wells 9 & 12) / TP07 |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2023-12-28 | TP 6 (Well 8) / TP06 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2023-12-28 | TP 8 (Well 10) / TP08 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2023-12-28 | TP 9 (Well 11) / TP09 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2023-12-28 | TP 7 (Wells 9 & 12) / TP07 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2023-12-28 | TP 8 (Well 10) / TP08 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2023-12-28 | TP 6 (Well 8) / TP06 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2023-12-28 | TP 3 (Well 4) / TP03 |
| PFBA | 0.0188 µg/L | 0.005 µg/L | 2023-12-28 | TP 1 (Well 1) / TP01 |
| PFBS | 0.0079 µg/L | 0.003 µg/L | 2023-12-28 | TP 7 (Wells 9 & 12) / TP07 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2023-12-28 | TP 5 (Well 7) / TP05 |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2023-12-28 | TP 7 (Wells 9 & 12) / TP07 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2023-12-28 | TP 5 (Well 7) / TP05 |
| PFHpA | 0.0053 µg/L | 0.003 µg/L | 2023-12-28 | TP 8 (Well 10) / TP08 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2023-12-28 | TP 3 (Well 4) / TP03 |
| PFHxA | 0.0099 µg/L | 0.003 µg/L | 2023-12-28 | TP 5 (Well 7) / TP05 |
| PFHxS | 0.0066 µg/L | 0.003 µg/L | 2023-12-28 | TP 1 (Well 1) / TP01 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2023-12-28 | TP 7 (Wells 9 & 12) / TP07 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2023-12-28 | TP 8 (Well 10) / TP08 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2023-12-28 | TP 3 (Well 4) / TP03 |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2023-12-28 | TP 3 (Well 4) / TP03 |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2023-12-28 | TP 1 (Well 1) / TP01 |
| PFPeA | 0.0075 µg/L | 0.003 µg/L | 2023-12-28 | TP 6 (Well 8) / TP06 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2023-12-28 | TP 3 (Well 4) / TP03 |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2023-12-28 | TP 5 (Well 7) / TP05 |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2023-12-28 | TP 5 (Well 7) / TP05 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2023-12-28 | TP 8 (Well 10) / TP08 |
| lithium | 32.1 µg/L | 9 µg/L | 2023-12-28 | TP 7 (Wells 9 & 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
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.00022 mg/L | 2025-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.00214 mg/L | 2025-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.00123 mg/L | 2025-07-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.000813 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2024-07-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.00146 mg/L | 2024-01-01 – 2024-06-30 | 2026Q3 |
| Lead (PB90) | 0.00127 mg/L | 2023-07-01 – 2023-12-31 | 2026Q3 |
| Copper (CU90) | 1.686 mg/L | 2023-01-01 – 2023-06-30 | 2026Q3 |
Published compliance history
73 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2025-10-01 – 2025-10-31 | Resolved | No | 2026Q3 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2025-10-01 – 2025-10-31 | Resolved | No | 2026Q3 |
| Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation | 2025-07-12 – — | Unaddressed | No | 2026Q3 |
| Lead and Copper Rule Revisions / Notification, Known or Potential LSL | 2025-07-02 – — | Resolved | No | 2026Q3 |
| Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting | 2025-07-01 – — | Unaddressed | No | 2026Q3 |
| Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation | 2025-02-23 – — | Resolved | No | 2026Q3 |
| Public Notice Rule and Revised PN Rule / Public Notification Violation for NPDWR Violation | 2024-07-13 – — | Resolved | No | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2024-07-01 – — | Resolved | No | 2026Q3 |
| Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting | 2024-07-01 – — | Unaddressed | No | 2026Q3 |
| Lead and Copper Rule / OCCT/SOWT Study/Recommendation | 2024-01-02 – — | Resolved | Yes | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2023-07-01 – — | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2023-07-01 – 2023-09-30 | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2023-07-01 – 2023-09-30 | Resolved | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2023-01-01 – 2025-12-31 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2023-01-01 – 2025-12-31 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2023-01-01 – 2025-12-31 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2023-01-01 – 2025-12-31 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2023-01-01 – 2025-12-31 | Archived | No | 2026Q3 |
| Arsenic Rule / Monitoring, Regular | 2023-01-01 – 2025-12-31 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2023-01-01 – 2025-12-31 | 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)
Kemp, John: 815-723-8671
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.