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PublicWater Watch

Chicago

Published drinking-water records and contacts for Chicago. System IL0316000. Review sources and dates; not a real-time water assessment.

System ID
IL0316000
State or territory
IL
Published population served
2721308
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.

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

EPA UCMR 5 — most recent imported sample per substance
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2024-10-08South-+Plant / TP02
4:2 FTS< 0.003 µg/L0.003 µg/L2024-10-08South-+Plant / TP02
6:2 FTS< 0.005 µg/L0.005 µg/L2024-10-08South-+Plant / TP02
8:2 FTS< 0.005 µg/L0.005 µg/L2024-10-08Jardine-+Plant / TP01
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-10-08Jardine-+Plant / TP01
ADONA< 0.003 µg/L0.003 µg/L2024-10-08Jardine-+Plant / TP01
HFPO-DA< 0.005 µg/L0.005 µg/L2024-10-08Jardine-+Plant / TP01
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-10-08South-+Plant / TP02
NFDHA< 0.02 µg/L0.02 µg/L2024-10-08South-+Plant / TP02
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-10-08South-+Plant / TP02
PFBA< 0.005 µg/L0.005 µg/L2024-10-08Jardine-+Plant / TP01
PFBS< 0.003 µg/L0.003 µg/L2024-10-08Jardine-+Plant / TP01
PFDA< 0.003 µg/L0.003 µg/L2024-10-08Jardine-+Plant / TP01
PFDoA< 0.003 µg/L0.003 µg/L2024-10-08Jardine-+Plant / TP01
PFEESA< 0.003 µg/L0.003 µg/L2024-10-08South-+Plant / TP02
PFHpA< 0.003 µg/L0.003 µg/L2024-10-08South-+Plant / TP02
PFHpS< 0.003 µg/L0.003 µg/L2024-10-08Jardine-+Plant / TP01
PFHxA< 0.003 µg/L0.003 µg/L2024-10-08South-+Plant / TP02
PFHxS< 0.003 µg/L0.003 µg/L2024-10-08Jardine-+Plant / TP01
PFMBA< 0.003 µg/L0.003 µg/L2024-10-08Jardine-+Plant / TP01
PFMPA< 0.004 µg/L0.004 µg/L2024-10-08South-+Plant / TP02
PFNA< 0.004 µg/L0.004 µg/L2024-10-08Jardine-+Plant / TP01
PFOA< 0.004 µg/L0.004 µg/L2024-10-08South-+Plant / TP02
PFOS< 0.004 µg/L0.004 µg/L2024-10-08South-+Plant / TP02
PFPeA< 0.003 µg/L0.003 µg/L2024-10-08South-+Plant / TP02
PFPeS< 0.004 µg/L0.004 µg/L2024-10-08South-+Plant / TP02
PFTA< 0.008 µg/L0.008 µg/L2024-10-08Jardine-+Plant / TP01
PFTrDA< 0.007 µg/L0.007 µg/L2024-10-08Jardine-+Plant / TP01
PFUnA< 0.002 µg/L0.002 µg/L2024-10-08Jardine-+Plant / TP01
lithium< 9 µg/L9 µg/L2024-10-08Jardine-+Plant / TP01

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) 0.0064 mg/L2026-01-01 – 2026-06-302026Q3
Lead (PB90) 0.0088 mg/L2025-07-01 – 2025-12-312026Q3
Lead (PB90) 0.0073 mg/L2025-01-01 – 2025-06-302026Q3
Lead (PB90) 0.0071 mg/L2024-01-01 – 2024-12-312026Q3
Lead (PB90) 0.0077 mg/L2023-01-01 – 2023-12-312026Q3
Lead (PB90) 0.0068 mg/L2022-01-01 – 2022-12-312026Q3
Lead (PB90) 0.0056 mg/L2019-01-01 – 2021-12-312026Q3
Lead (PB90) 0.0091 mg/L2016-01-01 – 2018-12-312026Q3

Published compliance history

44 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
Lead and Copper Rule Revisions / Notification, Known or Potential LSL2025-07-02 – —ResolvedNo2026Q3
Interim and Long Term 1 Enhanced Surface Water Treatment Rule / Monitoring, Turbidity (Enhanced SWTR)2025-05-01 – 2025-05-31ResolvedNo2026Q3
Interim and Long Term 1 Enhanced Surface Water Treatment Rule / Monitoring, Turbidity (Enhanced SWTR)2025-04-01 – 2025-04-30ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2025-01-01 – 2025-12-31ArchivedNo2026Q3
Stage 1 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2024-07-01 – 2024-09-30ResolvedNo2026Q3
Stage 1 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2024-07-01 – 2024-09-30ResolvedNo2026Q3
Stage 1 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2024-07-01 – 2024-09-30ResolvedNo2026Q3
Stage 1 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2024-07-01 – 2024-09-30ResolvedNo2026Q3
Lead and Copper Rule / Lead Consumer Notice2021-12-30 – —ResolvedNo2026Q3
Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report2021-07-01 – —ResolvedNo2026Q3
Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report2020-07-01 – —ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3
Synthetic Organic Chemicals / Monitoring, Regular2019-01-01 – 2019-12-31ResolvedNo2026Q3

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)

Conner Jr, Alfonzo (RANDY): 312-744-7001

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