AVISTON, IL · Macoupin County

MOUNT OLIVE Water System

Current status

3 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): IL1170700
System type: Community Water System
Population served: 2,193
Service connections: 1,034
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
December 26, 2025
Unaddressed
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2025 – December 31, 2025
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
November 1, 2025 – November 30, 2025
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2025 – October 31, 2025
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
July 12, 2025
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2025 – August 12, 2025
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2025
Unaddressed
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2024 – November 20, 2024
Resolved
Monitoring and Reporting (DBP)
—
Chloramine
January 1, 2024 – February 23, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2024 – January 31, 2024
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2023 – July 11, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 18, 2023
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2023 – February 23, 2024
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
November 30, 2022 – January 31, 2023
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 2008 – June 27, 2008
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2008 – May 31, 2008
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 2008 – April 30, 2008
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 2008 – March 31, 2008
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2008 – February 29, 2008
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2008 – January 31, 2008
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2007 – December 31, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 2007 – November 30, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2007 – October 31, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2007 – September 30, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2007 – August 31, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2007 – July 31, 2007
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2007 – September 30, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 2007 – June 30, 2007
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
May 20, 2007 – June 5, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2007 – May 31, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 2007 – April 30, 2007
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2007 – June 30, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 2007 – March 31, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2007 – February 28, 2007
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2007 – February 20, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2007 – January 31, 2007
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2007 – March 31, 2007
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 2007 – January 31, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2006 – December 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 2006 – November 30, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2006 – October 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2006 – September 30, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2006 – August 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2006 – July 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 2006 – June 30, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2006 – May 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 2006 – April 30, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 2006 – March 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2006 – February 28, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2006 – January 31, 2006
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
June 1, 1998 – June 30, 1998
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1998 – June 30, 1998
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1997 – June 30, 1997
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1993 – October 31, 1993
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 1993 – September 30, 1993
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1993 – September 30, 1993
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
December 26, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
December 1, 2025 – December 31, 2025	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
November 1, 2025 – November 30, 2025	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 1, 2025 – October 31, 2025	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
July 12, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
July 1, 2025 – August 12, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2025	Lead Consumer Notice	Lead and Copper Rule	—	Unaddressed
July 1, 2024 – November 20, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2024 – February 23, 2024	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2023 – July 11, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2023 – July 18, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2023 – February 23, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
November 30, 2022 – January 31, 2023	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
June 1, 2008 – June 27, 2008	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2008 – May 31, 2008	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2008 – April 30, 2008	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 2008 – March 31, 2008	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2008 – February 29, 2008	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2008 – January 31, 2008	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
December 1, 2007 – December 31, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 2007 – November 30, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 2007 – October 31, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2007 – September 30, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2007 – August 31, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2007 – July 31, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2007 – September 30, 2007	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
June 1, 2007 – June 30, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 20, 2007 – June 5, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
May 1, 2007 – May 31, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2007 – April 30, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2007 – June 30, 2007	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
March 1, 2007 – March 31, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2007 – February 28, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2007 – February 20, 2007	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2007 – January 31, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2007 – March 31, 2007	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
January 1, 2007 – January 31, 2007	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
December 1, 2006 – December 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 2006 – November 30, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 2006 – October 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2006 – September 30, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2006 – August 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2006 – July 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2006 – June 30, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2006 – May 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2006 – April 30, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 2006 – March 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2006 – February 28, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2006 – January 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 1998 – June 30, 1998	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
June 1, 1998 – June 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
June 1, 1997 – June 30, 1997	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
June 1, 1997 – June 30, 1997	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1993 – October 31, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 1993 – September 30, 1993	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 1993 – September 30, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

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

December 22, 2025State Violation/Reminder Notice1 linked violation
December 22, 2025State Public Notification requested1 linked violation
November 25, 2025State Public Notification requested2 linked violations
November 25, 2025State Violation/Reminder Notice1 linked violation
August 26, 2025State Violation/Reminder Notice1 linked violation
August 12, 2025State Compliance achieved1 linked violation
July 30, 2025State Violation/Reminder Notice1 linked violation
July 16, 2025State Violation/Reminder Notice1 linked violation
November 20, 2024State Compliance achieved1 linked violation
July 11, 2024State Public Notification requested1 linked violation
July 11, 2024State Compliance achieved1 linked violation
July 11, 2024State Violation/Reminder Notice1 linked violation
June 26, 2024State Public Notification received1 linked violation
June 10, 2024State Public Notification received1 linked violation
June 10, 2024State Public Notification received1 linked violation
February 23, 2024State Compliance achieved1 linked violation
February 23, 2024State Compliance achieved2 linked violations
February 21, 2024State Violation/Reminder Notice1 linked violation
February 21, 2024State Violation/Reminder Notice1 linked violation
February 21, 2024State Public Notification requested1 linked violation
February 21, 2024State Public Notification requested1 linked violation
December 7, 2023State Violation/Reminder Notice1 linked violation
July 24, 2023State Violation/Reminder Notice1 linked violation
July 18, 2023State Compliance achieved1 linked violation
July 13, 2023State Violation/Reminder Notice1 linked violation
July 13, 2023State Public Notification requested1 linked violation
January 31, 2023State Compliance achieved1 linked violation
January 24, 2023State Violation/Reminder Notice1 linked violation
August 21, 2008State Public Notification received3 linked violations
July 28, 2008State Violation/Reminder Notice1 linked violation
July 28, 2008State Violation/Reminder Notice1 linked violation
July 28, 2008State Public Notification requested1 linked violation
July 28, 2008State Public Notification requested1 linked violation
July 28, 2008State Violation/Reminder Notice1 linked violation
July 28, 2008State Public Notification requested1 linked violation
June 27, 2008State Compliance achieved30 linked violations
May 9, 2008State Public Notification received3 linked violations
April 4, 2008State Public Notification requested3 linked violations
April 4, 2008State Violation/Reminder Notice3 linked violations
February 15, 2008State Public Notification received3 linked violations
January 16, 2008State Bilateral Compliance Agreement signed30 linked violations
January 14, 2008State Public Notification requested3 linked violations
January 14, 2008State Violation/Reminder Notice3 linked violations
December 3, 2007State Compliance achieved3 linked violations
November 9, 2007State Public Notification received1 linked violation
November 9, 2007State Public Notification received2 linked violations
October 18, 2007State Public Notification requested1 linked violation
October 18, 2007State Violation/Reminder Notice1 linked violation
October 9, 2007State Public Notification requested2 linked violations
October 9, 2007State Violation/Reminder Notice2 linked violations
September 21, 2007State Public Notification received19 linked violations
September 5, 2007State Formal Notice of Violation issued31 linked violations
August 20, 2007State Violation/Reminder Notice19 linked violations
August 20, 2007State Public Notification requested19 linked violations
August 16, 2007State Public Notification received1 linked violation
August 1, 2007State Compliance achieved1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
June 18, 2007State Violation/Reminder Notice1 linked violation
June 14, 2007State Bilateral Compliance Agreement signed3 linked violations
June 8, 2007State Public Notification received4 linked violations
June 5, 2007State Compliance achieved1 linked violation
May 10, 2007State Formal Notice of Violation issued4 linked violations
April 19, 2007State Public Notification requested1 linked violation
April 19, 2007State Violation/Reminder Notice1 linked violation
February 20, 2007State Compliance achieved1 linked violation
February 16, 2007State Violation/Reminder Notice1 linked violation
February 15, 2007State Public Notification requested1 linked violation
February 15, 2007State Violation/Reminder Notice1 linked violation
August 15, 1998State Public Notification requested2 linked violations
August 15, 1998State Violation/Reminder Notice2 linked violations
August 23, 1997State Public Notification requested2 linked violations
August 23, 1997State Violation/Reminder Notice2 linked violations
December 4, 1993State Public Notification requested1 linked violation
December 4, 1993State Violation/Reminder Notice1 linked violation
December 2, 1993State Public Notification received1 linked violation
November 4, 1993State Public Notification received2 linked violations
October 30, 1993State Public Notification requested2 linked violations
October 30, 1993State Violation/Reminder Notice2 linked violations

Contact

HORSTMANN, CHRISTOPHER L.

618-973-0633

AVISTON, IL 62216