Public water system profile

CHICAGO

Explore available public water records for CHICAGO (PWSID IL0316000). Find annual reports, results listed in those reports, official sources, and clear notes about what the records can and cannot show. This page does not show conditions at a specific tap.

View report rows

System Snapshot

Available system-level context

This snapshot shows the identity and context fields currently available for CHICAGO (PWSID IL0316000). Read it with the source links and limitations below.

Last updated: Data reviewed:

System identity

PWSID
IL0316000
State
Illinois
Linked communities
Chicago
County context
Not listed in current record
System type
Community water system
Source water
Lake Michigan surface water treated at the Jardine and Sawyer water purification plants
Population served
Not listed in current record
Service connections
Not listed in current record
Latest reviewed report
2025 report link found
Data updated
2026-08-03

Read these as system-level fields from reviewed public records. Confirm provider and address-specific questions with official utility, city, state, or EPA sources.

Report-Listed Rows

Report-listed rows summarized from the latest reviewed report

2 report-listed rows are summarized for CHICAGO. A listed row is not the same thing as a current advisory or household tap result.

Report year
2025
Rows summarized
2
Source tables represented
1
Scope
Past reporting period
Report-row preview from the latest reviewed report for CHICAGO
Substance and testing periodReported valueRange in reportLimit or standardSource tableReport-printed status
TTHM [TOTAL TRIHALOMETHANES]Testing period: 202526.4 ppbHighest Level Detected13.4 - 34.2MCL: 80; MCLG: N/A2025 Water Quality DataPage 9Typical source, as printed: By-product of drinking water disinfectionStatus: Pass, as printed for this report period
HAA5 [HALOACETIC ACIDS]Testing period: 202513.8 ppbHighest Level Detected7.4 - 18.8MCL: 60; MCLG: N/A2025 Water Quality DataPage 9Typical source, as printed: By-product of drinking water disinfectionStatus: Pass, as printed for this report period

Report row

TTHM [TOTAL TRIHALOMETHANES]

Range in report
13.4 - 34.2 ppb
Highest Level Detected
26.4 ppb
Testing period
2025
Sites above action level
Not applicable to this summarized entry
Limit or standard
MCL: 80; MCLG: N/A
Report-printed status
Status: Pass, as printed for this report period

Source · Page 9

2025 Water Quality Data

Typical source, as printed: By-product of drinking water disinfection

Report row

HAA5 [HALOACETIC ACIDS]

Range in report
7.4 - 18.8 ppb
Highest Level Detected
13.8 ppb
Testing period
2025
Sites above action level
Not applicable to this summarized entry
Limit or standard
MCL: 60; MCLG: N/A
Report-printed status
Status: Pass, as printed for this report period

Source · Page 9

2025 Water Quality Data

Typical source, as printed: By-product of drinking water disinfection

Source report notes

Source: Chicago Water Quality Report 2025. Retrieved 2026-08-03.

  • Applies to: TTHM [TOTAL TRIHALOMETHANES]

    4, range 13.4 - 34.2, MCLG N/A, MCL 80, date N/A, and printed Pass. The source says data are expressed as LRAA. Annual-report values and printed status describe only the cited 2025 report or sample period. They are not a current compliance feed, advisory determination, address-level result, household-tap result, exposure conclusion, or safety conclusion. The reviewed relationship does not identify the provider for an address or prove exclusive service.

  • Applies to: HAA5 [HALOACETIC ACIDS]

    8, range 7.4 - 18.8, MCLG N/A, MCL 60, date N/A, and printed Pass. The source-printed distribution note and LRAA definition spell the acronym HAAS; that spelling is disclosed rather than silently rewritten. Annual-report values and printed status describe only the cited 2025 report or sample period. They are not a current compliance feed, advisory determination, address-level result, household-tap result, exposure conclusion, or safety conclusion. The reviewed relationship does not identify the provider for an address or prove exclusive service.

Review the linked source report for definitions, footnotes, and official wording.

Violation Records

Violation records shown on this page

This section shows 0 system-scoped violation detail records currently included for CHICAGO. Annual reports and current notices can use different timing and terminology.

No system-scoped violation detail records are included in the available reviewed records for this system. This is not an official compliance finding. Check the official utility, state, or EPA source for current compliance and notice information.

Source notes for this system mention violation-related context, but this page does not currently display separate system-scoped violation detail records.

Important limitation

Profile summary note

This page summarizes public records reviewed by this site. It does not replace official notices, utility updates, or state drinking water information.

System profile limitations

  • The bounded preview shows only TTHM and HAA5 from physical PDF page 9. Other rows, report notices, treatment narrative, and health-effect text are not reproduced as contaminant rows or violation-detail records.
  • TTHM preserves 26.4 ppb and range 13.4 - 34.2. HAA5 preserves 13.8 ppb and range 7.4 - 18.8.
  • Each selected row prints Pass for the report period. Literal N/A, LRAA context, and the source-printed HAAS spelling in the report note remain disclosed without a present-day conclusion.
  • The report's turbidity monitoring and lead-service-line notification and certification notices remain dated source context without a current resolution or compliance conclusion.
  • Illinois DWW violation 2026-7017608 is a record-specific 2025 dinoseb monitoring entry. Its displayed status and enforcement actions are not generalized into systemwide or present-day status.
  • Chicago's official source describes distribution to Chicago and suburban communities. The relationship is regional and nonexclusive and does not identify the retail provider for an address.
  • No authoritative centralized live drinking-water-advisory index was verified, so the linked paths do not support a no-advisory claim.
  • Address-level service can vary. Confirm the serving provider with a bill, account portal, utility, city, or state source.
  • This page shows summarized entries from the available report. It does not include a complete contaminant or violation table.
  • Missing fields are not findings. They mean the field is not shown on this page from the records currently available.
  • This page summarizes available public records. It may not include every update, notice, or urgent official advisory.

Latest Reviewed Report

Latest reviewed report found by this site

The 2025 report found for CHICAGO summarizes a past reporting period. It is not a live alert page.

Utility reportReport data updated:

Chicago Water Quality Report 2025

Open 2025 water quality report

The 2025 report link is available for CHICAGO. Use the linked source report for the full table, definitions, footnotes, and official context. This page includes summarized entries from the available report. They are not a complete copy of the report table.

Report year
2025
Summarized entries shown
2
Source name
Chicago Water Quality Report 2025
Source URL
Open report source
Source retrieved
2026-08-03
Last reviewed
2026-08-03

Use the linked source report for the full table, definitions, footnotes, and official context.

Data coverage

This page summarizes selected public records for this public water system. It may not include every report, update, current notice, or address-level service detail.

Latest reviewed report
2025 report link found
Report-listed rows
2 summarized report entries shown
Detailed violation records
No detailed system-scoped records displayed
Population served
Not listed in current record
Service connections
Not listed in current record
City context
Chicago
County context
Not listed in current record

Local Context

City and state context for this system

CHICAGO is linked here to Chicago for navigation. That relationship does not confirm the provider for a specific address; use a bill, utility portal, or official lookup source.

Linked local context

Linked communities
Chicago
County context
Not listed in current record
State context
Illinois

Related Explainers

Related contaminants and guides

Use these explainers with CHICAGO's report year, source table, and official report. Links are limited to existing guide and contaminant pages.

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How to read a water quality report

A plain-English walkthrough of Consumer Confidence Reports, including report years, detected contaminants, legal limits, violations, and source notes.

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Corrections

Suggest a correction or newer source

If you have a newer official report, utility source, or correction, send the source link for review. This helps keep profile summaries tied to public records.

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Evidence

Official sources and report links

Use official federal, state, utility, or report sources before treating a page as final.

Data methodology

Review source hierarchy, missing-data handling, and record limitations.

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Data limitations

See why limited records, missing fields, and current notices need careful interpretation.

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