SENECA, IL · LaSalle County

SENECA 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): IL0991050
System type: Community Water System
Population served: 2,353
Service connections: 896
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring and Reporting (DBP)
—
TTHM
September 1, 2015 – September 7, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2005 – December 8, 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)
January 1, 2003 – March 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 7, 2000 – March 31, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 1993 – August 31, 1993
Archived
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
August 1, 1993 – March 20, 1995
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
August 23, 1985 – August 22, 1989
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
September 1, 2015 – September 7, 2007	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2005 – December 8, 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
January 1, 2003 – March 31, 2003	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
September 7, 2000 – March 31, 2001	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 1994 – July 31, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
August 1, 1993 – August 31, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 1993 – March 20, 1995	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
August 23, 1985 – August 22, 1989	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	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

May 9, 2017State Public Notification received2 linked violations
September 7, 2007State Compliance achieved3 linked violations
February 14, 2006State Public Notification received1 linked violation
January 10, 2006State Public Notification requested1 linked violation
January 10, 2006State Violation/Reminder Notice1 linked violation
November 14, 2005State Public Notification received1 linked violation
October 7, 2005State Violation/Reminder Notice1 linked violation
October 7, 2005State Public Notification requested1 linked violation
August 12, 2005State Public Notification received1 linked violation
July 8, 2005State Violation/Reminder Notice1 linked violation
July 8, 2005State Public Notification requested1 linked violation
May 12, 2005State Public Notification received1 linked violation
April 14, 2005State Bilateral Compliance Agreement signed5 linked violations
April 8, 2005State Public Notification requested1 linked violation
February 14, 2005State Public Notification received2 linked violations
February 9, 2005State Formal Notice of Violation issued6 linked violations
January 28, 2005State Public Notification requested2 linked violations
December 3, 2003State Compliance achieved1 linked violation
June 30, 2003State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
June 30, 2003State Public Notification received1 linked violation
June 11, 2003State Compliance achieved1 linked violation
May 28, 2003State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
May 28, 2003State Violation/Reminder Notice1 linked violation
May 28, 2003State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
March 31, 2001State Compliance achieved3 linked violations
March 20, 1995State Compliance achieved3 linked violations
March 16, 1995State Public Notification received1 linked violation
January 28, 1995State Public Notification received1 linked violation
December 28, 1994State Public Notification received1 linked violation
December 1, 1994State Public Notification received1 linked violation
October 2, 1994State Violation/Reminder Notice1 linked violation
October 2, 1994State Public Notification requested1 linked violation
September 1, 1994State Public Notification received2 linked violations
July 1, 1994State Public Notification received2 linked violations
April 29, 1994State Public Notification received1 linked violation
April 15, 1994State Public Notification received1 linked violation
April 15, 1994State Public Notification received3 linked violations
March 28, 1994State Public Notification received1 linked violation
March 1, 1994State Public Notification received2 linked violations
March 1, 1994State Public Notification received1 linked violation
January 15, 1994State Public Notification received1 linked violation
December 1, 1993State Public Notification received1 linked violation
December 1, 1993State Public Notification received2 linked violations
October 10, 1993State Violation/Reminder Notice1 linked violation
October 10, 1993State Public Notification requested1 linked violation
October 8, 1993State Public Notification received1 linked violation
October 1, 1993State Public Notification received1 linked violation
September 1, 1993State Public Notification received1 linked violation
August 25, 1993State Public Notification received1 linked violation
July 1, 1993State Public Notification received1 linked violation
May 1, 1993State Public Notification received1 linked violation
April 15, 1993State Public Notification received1 linked violation
March 15, 1993State Public Notification received1 linked violation
March 1, 1993State Public Notification received1 linked violation
January 31, 1993State Public Notification received1 linked violation
January 9, 1993State Violation/Reminder Notice1 linked violation
January 9, 1993State Public Notification requested1 linked violation
August 5, 1992State Public Notification received1 linked violation
June 4, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification received1 linked violation
May 7, 1992State Public Notification requested1 linked violation
January 2, 1992State Public Notification received1 linked violation
December 14, 1991State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
December 2, 1991State Public Notification received1 linked violation
November 1, 1991State Public Notification received1 linked violation
October 3, 1991State Public Notification received1 linked violation
August 30, 1991State Public Notification received1 linked violation
July 23, 1991State Public Notification requested1 linked violation
July 1, 1991State Public Notification received1 linked violation
May 1, 1991State Public Notification received1 linked violation
March 1, 1991State Public Notification received1 linked violation
January 24, 1991State Administrative/Compliance Order without penalty issued1 linked violation
December 3, 1990State Public Notification received2 linked violations
September 4, 1990State Public Notification received1 linked violation
March 1, 1990State Public Notification received1 linked violation

Contact

PEDDICORD, JENNIFER

815-357-8771

SENECA, IL 61360