Public Water Partners

POSEN, IL · Cook County

POSEN Water System

Consumer Confidence Report status

POSEN must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show 1 item for POSEN that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID)
IL0312520
System type
Community Water System
Population served
5,331
Service connections
1,754
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

POSEN is one of 248 community water systems in Illinois in the 3,301 to 10,000 people size category, serving 5,331 people from surface water.

As of August 1, 2026, its federal record holds 20 entries between 1997 and 2025, of which 1 remains open; none are health-based.

Of the 20, 14 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules, the Consumer Confidence Rule, and the Lead and Copper Rule.

Violation history

  • Notification, Known or Potential LSL

    —

    LEAD AND COPPER RULE REVISIONS

    July 2, 2025 – July 2, 2025

    Resolved

  • Consumer Confidence Report Inadequate Reporting

    —

    Consumer Confidence Rule

    July 1, 2025

    Unaddressed

  • Lead Consumer Notice

    —

    Lead and Copper Rule

    December 30, 2020 – February 2, 2021

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2017 – July 10, 2017

    Resolved

  • Consumer Confidence Report Inadequate Reporting

    —

    Consumer Confidence Rule

    July 1, 2014 – September 8, 2014

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Total Haloacetic Acids (HAA5)

    January 1, 2014 – August 31, 2014

    Resolved

  • Monitoring and Reporting (DBP)

    —

    TTHM

    January 1, 2014 – August 31, 2014

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    June 1, 2013 – June 30, 2013

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2012 – August 2, 2012

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    July 1, 2007 – December 31, 2007

    Resolved

  • Consumer Confidence Report Inadequate Reporting

    —

    Consumer Confidence Rule

    July 1, 2004 – June 30, 2005

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    November 1, 2001 – November 30, 2001

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 1, 2001 – October 31, 2001

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    March 1, 2001 – March 31, 2001

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    February 1, 2001 – February 28, 2001

    Archived

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    October 1, 2000 – October 31, 2000

    Archived

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    July 1, 2000 – July 31, 2000

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 1, 1999 – October 31, 1999

    Archived

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    April 1, 1999 – April 30, 1999

    Archived

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    January 1, 1997 – June 30, 1997

    Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Common questions

Is POSEN required to publish a Consumer Confidence Report?

Yes. POSEN is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is POSEN’s next Consumer Confidence Report due?

POSEN’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does POSEN have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show 1 item for POSEN that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MARROQUIN, JULIO

708-293-2620

POSEN, IL 60469