O'FALLON, IL · St. Clair County

O FALLON 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): IL1631100
System type: Community Water System
Population served: 46,603
Service connections: 18,497
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2007 – June 30, 2007
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
July 1, 1999 – July 31, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1999 – July 31, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 1998 – April 30, 1998
Archived
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
April 1, 1998 – April 30, 1998
Archived
Water Quality Parameter M/R
—
Lead and Copper Rule
April 1, 1997 – June 30, 1997
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 1994 – September 30, 1994
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1994 – September 30, 1994
Archived
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
July 1, 1994 – July 31, 1994
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1994 – July 31, 1994
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
February 1, 1994 – February 28, 1994
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 1994 – February 28, 1994
Archived
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
September 1, 1993 – February 6, 1995
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1993 – August 31, 1993
Archived
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
February 4, 1993 – February 6, 1995
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
September 1, 1992 – September 30, 1992
Archived
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
April 1, 1992 – December 8, 1992
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1991 – July 31, 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
January 1, 2007 – June 30, 2007	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 1999 – July 31, 1999	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
July 1, 1999 – July 31, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
April 1, 1998 – April 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
April 1, 1998 – April 30, 1998	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
April 1, 1997 – June 30, 1997	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 1997 – March 31, 1997	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
September 1, 1994 – September 30, 1994	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 1994 – September 30, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 1994 – July 31, 1994	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 1994 – July 31, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
February 1, 1994 – February 28, 1994	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
February 1, 1994 – February 28, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 1993 – February 6, 1995	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
August 1, 1993 – August 31, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
February 4, 1993 – February 6, 1995	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
September 1, 1992 – September 30, 1992	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
April 1, 1992 – December 8, 1992	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 1991 – July 31, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	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 20, 2007State Compliance achieved1 linked violation
July 12, 2007State Violation/Reminder Notice1 linked violation
September 15, 1999State Public Notification requested2 linked violations
September 15, 1999State Violation/Reminder Notice2 linked violations
June 27, 1998State Public Notification requested2 linked violations
June 27, 1998State Violation/Reminder Notice2 linked violations
April 1, 1998State Compliance achieved2 linked violations
November 2, 1996State Violation/Reminder Notice1 linked violation
November 2, 1996State Public Notification requested1 linked violation
September 18, 1996State Public Notification received1 linked violation
February 3, 1996State Violation/Reminder Notice1 linked violation
February 3, 1996State Public Notification requested1 linked violation
May 7, 1995State Public Notification received1 linked violation
May 4, 1995State Public Notification requested1 linked violation
May 4, 1995State Violation/Reminder Notice1 linked violation
February 6, 1995State Compliance achieved2 linked violations
December 3, 1994State Violation/Reminder Notice6 linked violations
October 2, 1994State Violation/Reminder Notice5 linked violations
April 14, 1994State Violation/Reminder Notice2 linked violations
April 14, 1994State Public Notification requested2 linked violations
April 14, 1994State Public Notification requested2 linked violations
April 14, 1994State Violation/Reminder Notice2 linked violations
March 2, 1994State Public Notification received3 linked violations
March 2, 1994State Public Notification received2 linked violations
October 14, 1993State Public Notification received2 linked violations
October 14, 1993State Public Notification received3 linked violations
October 14, 1993State Public Notification received2 linked violations
October 10, 1993State Public Notification requested2 linked violations
October 10, 1993State Violation/Reminder Notice2 linked violations
October 10, 1993State Public Notification requested2 linked violations
May 6, 1993State Violation/Reminder Notice1 linked violation
May 6, 1993State Public Notification requested1 linked violation
December 8, 1992State Compliance achieved1 linked violation
November 7, 1992State Violation/Reminder Notice2 linked violations
September 15, 1991State Public Notification requested1 linked violation
April 12, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
April 12, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
April 4, 1990State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
November 11, 1989State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record

Contact

BELL, HEIDE

618-624-4500

O'FALLON, IL 62269