Drinking Water Compliance OS

AURORA, IL · DeKalb County

CORTLAND CORNERS MHP Water System

Current status

1 open health-based violation on record as of July 4, 2026, alongside 10 other open item(s). See the violation history below for contaminant and status details.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)
IL0375125
System type
Community Water System
Population served
250
Service connections
82
Ownership
privately owned
Water source
groundwater (wells)

Violation history

  • Public Notification Violation for NPDWR Violation

    Public Notice

    August 22, 2025

    Unaddressed
  • Notification, Known or Potential LSL

    LEAD AND COPPER RULE REVISIONS

    July 2, 2025

    Unaddressed
  • Monitoring, Regular

    Nitrite

    July 1, 2025 – September 30, 2025

    Archived
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    July 1, 2025 – September 30, 2025

    Archived
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    July 1, 2025

    Unaddressed
  • Public Notification Violation for NPDWR Violation

    Public Notice

    April 19, 2025 – May 15, 2025

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    April 1, 2025 – June 30, 2025

    Archived
  • Public Notification Violation for NPDWR Violation

    Public Notice

    March 26, 2025 – May 15, 2025

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    March 1, 2025 – March 31, 2025

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    March 1, 2025 – March 31, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    February 21, 2025 – May 15, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    February 21, 2025 – May 15, 2025

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2025 – February 28, 2025

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    February 1, 2025 – February 28, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    January 26, 2025 – July 17, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    January 16, 2025 – July 17, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    January 11, 2025 – July 17, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    January 11, 2025 – July 17, 2025

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    January 1, 2025 – January 31, 2025

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    January 1, 2025 – January 31, 2025

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2025 – March 31, 2025

    Archived
  • Public Notification Violation for NPDWR Violation

    Public Notice

    December 18, 2024 – May 15, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    December 7, 2024 – May 15, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    December 7, 2024 – May 15, 2025

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    December 1, 2024 – December 31, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    December 1, 2024 – December 31, 2024

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    November 6, 2024 – July 17, 2025

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    November 1, 2024 – November 30, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    November 1, 2024 – November 30, 2024

    Resolved
  • LSL Inventory

    Health-based

    LEAD AND COPPER RULE REVISIONS

    October 17, 2024

    Unaddressed
  • LSL Reporting

    LEAD AND COPPER RULE REVISIONS

    October 17, 2024

    Unaddressed
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 16, 2024 – July 17, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 11, 2024 – May 15, 2025

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    October 1, 2024 – October 31, 2024

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    October 1, 2024 – October 31, 2024

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    October 1, 2024

    Unaddressed
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    September 1, 2024 – September 30, 2024

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    August 28, 2024 – July 17, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    August 28, 2024

    Unaddressed
  • Public Notification Violation for NPDWR Violation

    Public Notice

    August 15, 2024 – July 17, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    August 13, 2024 – July 17, 2025

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    August 1, 2024 – August 31, 2024

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    July 20, 2024 – July 17, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    July 20, 2024 – July 17, 2025

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2024

    Unaddressed
  • Monitoring and Reporting (DBP)

    Chlorine

    July 1, 2024 – September 30, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    July 1, 2024 – July 31, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    June 1, 2024 – June 30, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    May 1, 2024 – May 31, 2024

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    April 14, 2024 – July 17, 2025

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    April 1, 2024 – April 30, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2024 – February 29, 2024

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2024 – December 31, 2024

    Archived
  • Monitoring, Regular

    Nitrate

    January 1, 2024 – December 31, 2024

    Archived
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    January 1, 2024 – January 31, 2024

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    January 1, 2024 – March 31, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    December 1, 2023 – December 31, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    November 1, 2023 – November 30, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    October 1, 2023 – October 31, 2023

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    October 1, 2023 – December 31, 2023

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    October 1, 2023

    Unaddressed
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    September 1, 2023 – September 30, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    August 1, 2023 – August 31, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    July 1, 2023 – July 31, 2023

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    July 1, 2023 – September 30, 2023

    Resolved
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    July 1, 2023

    Unaddressed
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    June 1, 2023 – June 30, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    May 1, 2023 – May 31, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    April 1, 2023 – April 30, 2023

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    April 1, 2023 – June 30, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    March 1, 2023 – March 31, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2023 – February 28, 2023

    Resolved
  • Monitoring, Regular

    Mercury

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2023 – December 31, 2023

    Archived
  • Monitoring and Reporting (DBP)

    Chlorine

    January 1, 2023 – March 31, 2023

    Resolved
  • Monitoring, Regular

    Chromium

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    January 1, 2023 – January 31, 2023

    Resolved
  • Monitoring, Regular

    Nickel

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Fluoride

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Nitrate

    January 1, 2023 – December 31, 2023

    Archived
  • Monitoring, Regular

    Barium

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Beryllium, Total

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Arsenic

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Cadmium

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Thallium, Total

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    August 1, 2022 – August 31, 2022

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    July 1, 2022 – September 30, 2022

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    July 1, 2022 – September 30, 2022

    Resolved
  • Monitoring, Regular

    Combined Uranium

    July 1, 2022 – September 30, 2022

    Resolved
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    July 1, 2022

    Unaddressed
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    July 1, 2022 – July 31, 2022

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    December 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    November 1, 2021 – November 30, 2021

    Resolved
  • Monitoring, Regular

    Combined Uranium

    October 1, 2021 – December 31, 2021

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    October 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    October 1, 2021 – October 31, 2021

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    October 1, 2021 – February 27, 2024

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    October 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    September 1, 2021 – September 30, 2021

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    August 1, 2021 – August 31, 2021

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    July 1, 2021 – July 31, 2021

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    July 1, 2021 – September 30, 2021

    Resolved
  • Monitoring, Regular

    Combined Uranium

    July 1, 2021 – September 30, 2021

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    July 1, 2021 – September 30, 2021

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    March 12, 2021 – March 25, 2021

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    March 12, 2021 – March 25, 2021

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2020 – February 29, 2020

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    January 1, 2020 – March 31, 2020

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    November 1, 2019 – November 30, 2019

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    October 1, 2019 – December 11, 2019

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    June 22, 2005 – June 30, 2005

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    July 1, 2004 – September 30, 2004

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    April 1, 2004 – June 30, 2004

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    January 1, 2004 – March 31, 2004

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    October 1, 2003 – December 31, 2003

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    April 1, 2003 – June 30, 2003

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    January 1, 2003 – March 31, 2003

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    October 1, 2002 – December 31, 2002

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    October 1, 2000 – December 31, 2000

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    July 1, 2000 – September 30, 2000

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    July 1, 2000 – September 30, 2000

    Resolved
  • Monitoring, Regular

    Nitrate

    July 1, 2000 – September 30, 2000

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    April 1, 2000 – June 30, 2000

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2000 – March 31, 2000

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    January 1, 2000 – March 31, 2000

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    October 1, 1999 – December 31, 1999

    Resolved
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    August 1, 1998 – August 31, 1998

    Archived
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 1998 – August 31, 1998

    Archived
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 1998 – July 31, 1998

    Archived
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    July 1, 1998 – July 31, 1998

    Archived
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    January 1, 1995 – December 31, 1998

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    October 1, 1993 – October 31, 1993

    Archived
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    October 1, 1992 – October 31, 1992

    Archived
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    November 1, 1990 – September 3, 1992

    Resolved

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

Enforcement actions

Contact

NABONSAL, JILL

312-912-5128

AURORA, IL 60506