MAQUON, IL · Knox County

MAQUON 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): IL0950350
System type: Community Water System
Population served: 218
Service connections: 149
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2024 – August 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2024 – September 30, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2023 – December 31, 2025
Archived
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2022 – June 27, 2023
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2009 – March 31, 2009
Resolved
Monitoring, Regular
—
Fluoride
July 1, 2005 – September 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 1999 – June 30, 1999
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 1995 – August 31, 1995
Archived
Monitoring, Regular
—
Nitrate
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 1991 – February 28, 1991
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 1985 – November 14, 1985
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
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
August 1, 2024 – August 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
December 30, 2022 – June 27, 2023	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2009 – March 31, 2009	Monitoring, Regular	Fluoride	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	Fluoride	—	Resolved
April 1, 1999 – June 30, 1999	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
August 1, 1995 – August 31, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
January 1, 1994 – December 31, 1994	Monitoring, Regular	Nitrate	—	Resolved
February 1, 1991 – February 28, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
July 1, 1985 – November 14, 1985	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

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

Enforcement actions

October 14, 2025State Public Notification requested1 linked violation
October 14, 2025State Violation/Reminder Notice1 linked violation
June 25, 2025State Public Notification received1 linked violation
June 25, 2025State Public Notification received1 linked violation
October 10, 2024State Compliance achieved2 linked violations
September 25, 2024State Public Notification requested1 linked violation
September 25, 2024State Public Notification requested1 linked violation
September 25, 2024State Violation/Reminder Notice1 linked violation
June 27, 2023State Compliance achieved1 linked violation
January 24, 2023State Violation/Reminder Notice1 linked violation
May 2, 2009State Compliance achieved1 linked violation
April 14, 2009State Violation/Reminder Notice1 linked violation
February 5, 2008State Compliance achieved1 linked violation
January 14, 2008State Public Notification requested1 linked violation
January 14, 2008State Violation/Reminder Notice1 linked violation
November 1, 2005State Violation/Reminder Notice1 linked violation
October 17, 2005State Compliance achieved1 linked violation
May 13, 1999State Violation/Reminder Notice1 linked violation
May 13, 1999State Public Notification requested1 linked violation
November 4, 1995State Violation/Reminder Notice1 linked violation
November 4, 1995State Public Notification requested1 linked violation
November 1, 1995State Public Notification received1 linked violation
August 15, 1995State Public Notification received1 linked violation
February 20, 1995State Compliance achieved1 linked violation
February 1, 1995State Public Notification requested1 linked violation
February 1, 1995State Violation/Reminder Notice1 linked violation
April 11, 1991State Public Notification requested1 linked violation
April 11, 1991State Violation/Reminder Notice1 linked violation
April 8, 1991State Public Notification received2 linked violations
December 15, 1990State Public Notification requested1 linked violation
December 15, 1990State Violation/Reminder Notice1 linked violation
January 13, 1990State Public Notification requested2 linked violations
January 13, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 10, 1990State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
September 30, 1988State Public Notification received2 linked violations

Contact

THOMAS, MARK

309-875-3553

MAQUON, IL 61458