THAYER, IL · Sangamon County

THAYER Water System

Current status

No open violations on record as of July 4, 2026.

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): IL1671250
System type: Community Water System
Population served: 721
Service connections: 364
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2023 – October 8, 2024
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2020 – October 8, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2019 – October 8, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – September 3, 2019
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2019 – September 30, 2019
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2019 – September 30, 2019
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2018 – December 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2013 – April 30, 2013
Resolved
Monitoring and Reporting (DBP)
—
Chloramine
April 1, 2013 – May 16, 2013
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2013 – June 30, 2013
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2012 – July 25, 2012
Resolved
Monitoring and Reporting (DBP)
—
Chloramine
July 1, 2011 – August 18, 2011
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2011 – July 31, 2011
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2010 – July 31, 2010
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2004 – September 28, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1998 – June 30, 1998
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1998 – May 31, 1998
Archived
Maximum Contaminant Level Violation, Average
Health-based
Atrazine
April 1, 1994 – June 21, 1994
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Atrazine
October 1, 1993 – December 31, 1993
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1992 – August 31, 1992
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
October 1, 2023 – October 8, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2020 – October 8, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2019 – October 8, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2019 – September 3, 2019	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2019 – September 30, 2019	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2019 – September 30, 2019	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2013 – April 30, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2013 – May 16, 2013	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
April 1, 2013 – June 30, 2013	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2012 – July 25, 2012	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2011 – August 18, 2011	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
July 1, 2011 – July 31, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2010 – July 31, 2010	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2004 – September 28, 2004	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
June 1, 1998 – June 30, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
May 1, 1998 – May 31, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
April 1, 1994 – June 21, 1994	Maximum Contaminant Level Violation, Average	Atrazine	Health-based	Resolved
October 1, 1993 – December 31, 1993	Maximum Contaminant Level Violation, Average	Atrazine	Health-based	Resolved
August 1, 1992 – August 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

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

Enforcement actions

October 8, 2024State Compliance achieved1 linked violation
January 4, 2024State Public Notification received1 linked violation
October 11, 2023State Public Notification requested1 linked violation
October 11, 2023State Violation/Reminder Notice1 linked violation
October 8, 2021State Compliance achieved2 linked violations
December 14, 2020State Public Notification received1 linked violation
October 20, 2020State Violation/Reminder Notice1 linked violation
October 20, 2020State Public Notification requested1 linked violation
February 4, 2020State Public Notification received1 linked violation
December 31, 2019State Public Notification requested1 linked violation
December 31, 2019State Violation/Reminder Notice1 linked violation
December 24, 2019State Compliance achieved2 linked violations
November 4, 2019State Public Notification received1 linked violation
November 4, 2019State Public Notification received1 linked violation
October 15, 2019State Public Notification requested1 linked violation
October 15, 2019State Public Notification requested1 linked violation
October 15, 2019State Violation/Reminder Notice1 linked violation
October 15, 2019State Violation/Reminder Notice1 linked violation
September 3, 2019State Compliance achieved1 linked violation
July 17, 2019State Violation/Reminder Notice1 linked violation
April 5, 2019State Compliance achieved2 linked violations
July 8, 2013State Public Notification received2 linked violations
May 17, 2013State Public Notification requested2 linked violations
May 17, 2013State Public Notification requested2 linked violations
May 16, 2013State Compliance achieved3 linked violations
August 23, 2012State Violation/Reminder Notice1 linked violation
July 25, 2012State Compliance achieved2 linked violations
August 18, 2011State Compliance achieved2 linked violations
August 17, 2011State Violation/Reminder Notice1 linked violation
August 17, 2011State Violation/Reminder Notice1 linked violation
September 7, 2010State Public Notification received1 linked violation
September 7, 2010State Compliance achieved2 linked violations
August 17, 2010State Public Notification requested7 linked violations
August 17, 2010State Intentional no-action1 linked violation
August 17, 2010State Violation/Reminder Notice1 linked violation
September 28, 2004State Compliance achieved2 linked violations
July 31, 2002State Violation/Reminder Notice1 linked violation
August 15, 1998State Public Notification requested1 linked violation
August 15, 1998State Violation/Reminder Notice1 linked violation
July 18, 1998State Public Notification requested1 linked violation
July 18, 1998State Violation/Reminder Notice1 linked violation
July 1, 1994State Public Notification requested1 linked violation
July 1, 1994State Violation/Reminder Notice1 linked violation
June 21, 1994State Compliance achieved3 linked violations
June 21, 1994State Compliance achieved2 linked violations
April 1, 1994State Violation/Reminder Notice1 linked violation
April 1, 1994State Public Notification requested3 linked violations
April 1, 1994State Public Notification requested1 linked violation
April 1, 1994State Violation/Reminder Notice3 linked violations
October 8, 1993State Public Notification requested2 linked violations
October 8, 1993State Public Notification requested1 linked violation
October 8, 1993State Violation/Reminder Notice1 linked violation
October 21, 1992State Public Notification received1 linked violation
October 17, 1992State Public Notification requested1 linked violation
November 17, 1990State Violation/Reminder Notice1 linked violation
November 17, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
October 31, 1990State Public Notification received8 linked violations

Contact

MCMAHAN, ROBERT

217-498-7263

THAYER, IL 62689