Is ELM OAK MUTUAL WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. ELM OAK MUTUAL WATER SYSTEM 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 ELM OAK MUTUAL WATER SYSTEM’s next Consumer Confidence Report due?

ELM OAK MUTUAL WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

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.

LAKE FOREST, IL · Lake County

ELM OAK MUTUAL WATER SYSTEM Water System

Consumer Confidence Report status

ELM OAK MUTUAL WATER SYSTEM 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 no open violations for ELM OAK MUTUAL WATER SYSTEM.

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): IL0975736
System type: Community Water System
Population served: 50
Service connections: 20
Ownership: privately owned
Water source: groundwater (wells)

ELM OAK MUTUAL WATER SYSTEM is one of 1,572 community water systems in Illinois in the 500 or fewer people size category, serving 50 people from groundwater.

As of August 1, 2026, its federal record holds 68 entries between 1987 and 2024, all of which EPA lists as closed.

Of the 68, 13 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 Radionuclides and Revised Rad Rule, the Public Notice Rule and Revised PN Rule, and the Total Coliform Rules.

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
February 11, 2024 – July 29, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 11, 2024 – July 29, 2025
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2020 – December 31, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
November 15, 2019 – December 18, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2019 – December 31, 2019
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 17, 2019 – August 19, 2019
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 17, 2019 – August 19, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2019 – September 30, 2019
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Combined Uranium
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2019 – June 30, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2018 – June 30, 2018
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2018 – June 30, 2018
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2012 – June 17, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2011 – September 30, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2011 – June 30, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2011 – March 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2010 – December 31, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2010 – September 30, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2010 – June 30, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2010 – March 31, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
July 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
January 1, 2009 – March 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2009 – March 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2008 – December 31, 2008
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 16, 2008 – July 31, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2008 – September 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2008 – June 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2008 – March 31, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2007 – December 31, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2007 – September 30, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2007 – June 30, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2007 – March 31, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2006 – December 31, 2006
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
July 30, 2006 – August 31, 2006
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 30, 2006 – August 31, 2006
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2006 – September 30, 2006
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2006 – June 30, 2006
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2006 – March 31, 2006
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2005 – December 31, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2005 – September 30, 2005
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2004 – December 31, 2004
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
Monitoring, Regular
—
Combined Radium (-226 and -228)
October 1, 2003 – December 31, 2003
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)
July 1, 2003 – September 30, 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
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
March 26, 2002 – September 30, 2002
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
January 1, 2000 – April 10, 2001
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
November 1, 1999 – September 30, 2002
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 1, 1992 – August 31, 1992
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1992 – May 31, 1992
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1992 – January 31, 1992
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
September 1, 1991 – November 30, 1991
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
September 1, 1991 – November 30, 1991
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
June 4, 1991 – December 1, 1992
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
November 30, 1987 – November 29, 1991
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
February 11, 2024 – July 29, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
February 11, 2024 – July 29, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
November 15, 2019 – December 18, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2019 – December 31, 2019	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 17, 2019 – August 19, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 17, 2019 – August 19, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2019 – June 30, 2019	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
June 1, 2018 – June 30, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2012 – June 17, 2013	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2011 – June 30, 2011	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2011 – March 31, 2011	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2010 – December 31, 2010	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2010 – September 30, 2010	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2010 – June 30, 2010	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 16, 2008 – July 31, 2008	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2008 – March 31, 2008	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2007 – December 31, 2007	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2007 – September 30, 2007	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2007 – June 30, 2007	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2007 – March 31, 2007	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2006 – December 31, 2006	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 30, 2006 – August 31, 2006	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
July 30, 2006 – August 31, 2006	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2006 – September 30, 2006	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2006 – June 30, 2006	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2006 – March 31, 2006	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2005 – December 31, 2005	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2005 – September 30, 2005	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2005 – June 30, 2005	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2004 – December 31, 2004	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2004 – September 30, 2004	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2004 – June 30, 2004	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2004 – March 31, 2004	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2003 – December 31, 2003	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
October 1, 2003 – December 31, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2003 – September 30, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2003 – June 30, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2003 – March 31, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2002 – December 31, 2002	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
March 26, 2002 – September 30, 2002	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
January 1, 2000 – April 10, 2001	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
November 1, 1999 – September 30, 2002	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived
June 1, 1992 – August 31, 1992	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
May 1, 1992 – May 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1992 – January 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 1991 – November 30, 1991	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
September 1, 1991 – November 30, 1991	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
June 4, 1991 – December 1, 1992	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
November 30, 1987 – November 29, 1991	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

July 31, 2025State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 31, 2025State Public Notification received1 linked violation
July 29, 2025State Compliance achieved1 linked violation
July 29, 2025State Compliance achieved1 linked violation
March 15, 2024State Violation/Reminder Notice1 linked violation
March 15, 2024State Violation/Reminder Notice1 linked violation
July 10, 2023State Compliance achieved1 linked violation
February 10, 2023State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
February 10, 2023State Violation/Reminder Notice1 linked violation
February 10, 2023State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 10, 2023State Public Notification requested1 linked violation
April 10, 2020State Compliance achieved2 linked violations
January 15, 2020State Violation/Reminder Notice1 linked violation
January 15, 2020State Other2 linked violations
December 18, 2019State Compliance achieved1 linked violation
December 18, 2019State Public Notification received1 linked violation
December 10, 2019State Violation/Reminder Notice1 linked violation
October 22, 2019State Formal Notice of Violation issued2 linked violations
October 15, 2019State Public Notification requested1 linked violation
October 15, 2019State Violation/Reminder Notice1 linked violation
September 26, 2019State Compliance achieved3 linked violations
August 28, 2019State Formal Notice of Violation issued2 linked violations
August 19, 2019State Compliance achieved4 linked violations
August 19, 2019State Compliance achieved1 linked violation
August 12, 2019State Violation/Reminder Notice1 linked violation
August 12, 2019State Violation/Reminder Notice1 linked violation
August 1, 2019State Public Notification received3 linked violations
July 12, 2019State Public Notification requested1 linked violation
July 12, 2019State Violation/Reminder Notice1 linked violation
July 12, 2019State Public Notification requested1 linked violation
July 12, 2019State Violation/Reminder Notice1 linked violation
July 12, 2019State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 12, 2019State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 12, 2019State Public Notification requested1 linked violation
July 12, 2019State Violation/Reminder Notice1 linked violation
July 12, 2019State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 12, 2019State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 30, 2018State Compliance achieved2 linked violations
July 16, 2018State Violation/Reminder Notice1 linked violation
July 16, 2018State Public Notification requested1 linked violation
July 16, 2018State Public Notification requested1 linked violation
July 16, 2018State Violation/Reminder Notice1 linked violation
June 17, 2013Federal Compliance achieved42 linked violations
June 17, 2013State Compliance achieved1 linked violation
September 5, 2012State Violation/Reminder Notice1 linked violation
January 13, 2012State Compliance achieved42 linked violations
November 10, 2011State Public Notification received1 linked violation
October 19, 2011State Violation/Reminder Notice1 linked violation
October 19, 2011State Public Notification requested1 linked violation
August 16, 2011State Public Notification received1 linked violation
July 20, 2011State Violation/Reminder Notice1 linked violation
July 20, 2011State Public Notification requested1 linked violation
May 4, 2011State Public Notification received1 linked violation
April 19, 2011State Violation/Reminder Notice1 linked violation
April 19, 2011State Public Notification requested1 linked violation
February 28, 2011State Public Notification received1 linked violation
January 21, 2011State Violation/Reminder Notice1 linked violation
January 21, 2011State Public Notification requested1 linked violation
November 17, 2010State Public Notification received1 linked violation
October 19, 2010State Public Notification requested1 linked violation
October 19, 2010State Violation/Reminder Notice1 linked violation
August 25, 2010State Public Notification received1 linked violation
July 15, 2010State Public Notification requested1 linked violation
July 15, 2010State Violation/Reminder Notice1 linked violation
April 26, 2010State Public Notification received1 linked violation
April 15, 2010State Public Notification requested1 linked violation
April 15, 2010State Violation/Reminder Notice1 linked violation
February 8, 2010State Public Notification received2 linked violations
January 20, 2010State Violation/Reminder Notice1 linked violation
January 20, 2010State Public Notification requested1 linked violation
January 20, 2010State Violation/Reminder Notice1 linked violation
January 20, 2010State Public Notification requested1 linked violation
November 19, 2009State Public Notification received2 linked violations
October 21, 2009State Violation/Reminder Notice1 linked violation
October 21, 2009State Public Notification requested1 linked violation
October 21, 2009State Violation/Reminder Notice1 linked violation
October 21, 2009State Public Notification requested1 linked violation
September 8, 2009State Public Notification received2 linked violations
July 16, 2009State Public Notification requested1 linked violation
July 16, 2009State Violation/Reminder Notice1 linked violation
July 15, 2009State Violation/Reminder Notice1 linked violation
July 15, 2009State Public Notification requested1 linked violation
May 26, 2009State Public Notification received2 linked violations
April 21, 2009State Public Notification requested1 linked violation
April 21, 2009State Violation/Reminder Notice1 linked violation
April 21, 2009State Violation/Reminder Notice1 linked violation
April 21, 2009State Public Notification requested1 linked violation
March 16, 2009State Compliance achieved4 linked violations
February 2, 2009State Public Notification received1 linked violation
January 14, 2009State Public Notification requested1 linked violation
January 14, 2009State Violation/Reminder Notice1 linked violation
November 3, 2008State Public Notification received1 linked violation
October 17, 2008State Public Notification requested1 linked violation
October 17, 2008State Violation/Reminder Notice1 linked violation
August 15, 2008State Violation/Reminder Notice1 linked violation
August 4, 2008State Public Notification received2 linked violations
July 31, 2008State Compliance achieved1 linked violation
July 17, 2008State Violation/Reminder Notice1 linked violation
July 17, 2008State Public Notification requested1 linked violation
April 16, 2008State Public Notification requested1 linked violation
April 16, 2008State Violation/Reminder Notice1 linked violation
March 28, 2008State Public Notification received1 linked violation
January 17, 2008State Public Notification requested1 linked violation
January 17, 2008State Violation/Reminder Notice1 linked violation
November 8, 2007State Public Notification received1 linked violation
October 18, 2007State Public Notification requested1 linked violation
October 18, 2007State Violation/Reminder Notice1 linked violation
October 5, 2007Federal Final Administrative Order issued32 linked violations
October 4, 2007State Administrative/Compliance Order without penalty issued48 linked violations
August 10, 2007State Public Notification received1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Public Notification requested1 linked violation
May 16, 2007State Public Notification received1 linked violation
April 24, 2007State Violation/Reminder Notice1 linked violation
April 24, 2007State Public Notification requested1 linked violation
February 6, 2007State Public Notification received3 linked violations
January 18, 2007State Violation/Reminder Notice2 linked violations
October 12, 2006State Violation/Reminder Notice1 linked violation
October 12, 2006State Public Notification requested1 linked violation
August 31, 2006State Compliance achieved3 linked violations
August 31, 2006State Public Notification received1 linked violation
August 11, 2006State Violation/Reminder Notice3 linked violations
January 30, 2006State Public Notification received1 linked violation
July 29, 2005State Public Notification requested2 linked violations
July 13, 2005State Compliance achieved1 linked violation
October 4, 2004State Public Notification received2 linked violations
June 30, 2004State Intentional no-action30 linked violations
July 3, 2003State Public Notification received1 linked violation
January 10, 2003State Public Notification requested2 linked violations
January 10, 2003State Violation/Reminder Notice1 linked violation
March 15, 1998State Public Notification received1 linked violation
December 27, 1997State Public Notification received1 linked violation
September 25, 1997State Public Notification received1 linked violation
September 15, 1997State Public Notification received1 linked violation
June 30, 1997State Public Notification received1 linked violation
March 25, 1997State Public Notification received1 linked violation
December 1, 1996State Public Notification received1 linked violation
September 23, 1996State Public Notification received1 linked violation
March 25, 1996State Public Notification received1 linked violation
September 1, 1995State Public Notification received2 linked violations
June 27, 1995State Public Notification received2 linked violations
March 27, 1995State Public Notification received2 linked violations
March 25, 1995State Public Notification received2 linked violations
December 27, 1994State Public Notification received2 linked violations
September 19, 1994State Public Notification received2 linked violations
September 19, 1994State Public Notification received2 linked violations
September 19, 1994State Public Notification received2 linked violations
June 25, 1994State Public Notification received2 linked violations
June 25, 1994State Public Notification received1 linked violation
December 11, 1993State Public Notification received2 linked violations
December 11, 1993State Public Notification received2 linked violations
September 22, 1993State Public Notification received2 linked violations
June 10, 1993State Public Notification received2 linked violations
March 20, 1993State Public Notification received2 linked violations
December 1, 1992State Compliance achieved1 linked violation
September 30, 1992State Compliance achieved7 linked violations
August 5, 1992State Public Notification received2 linked violations
July 11, 1992State Violation/Reminder Notice1 linked violation
April 20, 1992State Public Notification received2 linked violations
April 1, 1992State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
April 1, 1992State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
March 15, 1992State Violation/Reminder Notice1 linked violation
March 15, 1992State Public Notification requested1 linked violation
March 12, 1992State Public Notification requested1 linked violation
February 8, 1992State Public Notification requested1 linked violation
February 8, 1992State Violation/Reminder Notice1 linked violation
January 15, 1992State Public Notification received2 linked violations
January 11, 1992State Violation/Reminder Notice1 linked violation
January 11, 1992State Public Notification requested1 linked violation
September 30, 1991State Public Notification received1 linked violation
September 15, 1991State Violation/Reminder Notice1 linked violation
September 15, 1991State Public Notification requested1 linked violation
August 10, 1991State Public Notification requested1 linked violation
August 10, 1991State Violation/Reminder Notice1 linked violation
July 13, 1991State Public Notification requested1 linked violation
July 13, 1991State Violation/Reminder Notice1 linked violation
June 30, 1991State Public Notification received1 linked violation
March 25, 1991State Public Notification received1 linked violation
March 17, 1991State Violation/Reminder Notice1 linked violation
March 17, 1991State Public Notification requested1 linked violation
September 20, 1990State Public Notification received1 linked violation
September 16, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
August 11, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
August 11, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
June 11, 1990State Public Notification received2 linked violations
September 28, 1989State Public Notification received2 linked violations
July 17, 1989State Public Notification received2 linked violations
April 13, 1989State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
January 13, 1989State Bilateral Compliance Agreement signed1 linked violation
December 17, 1988State Public Notification requested2 linked violations

Common questions

Is ELM OAK MUTUAL WATER SYSTEM required to publish a Consumer Confidence Report?: Yes. ELM OAK MUTUAL WATER SYSTEM 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 ELM OAK MUTUAL WATER SYSTEM’s next Consumer Confidence Report due?: ELM OAK MUTUAL WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does ELM OAK MUTUAL WATER SYSTEM have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for ELM OAK MUTUAL WATER SYSTEM.
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

LACKO, ANTHONY A.

847-362-8646

LAKE FOREST, IL 60046