OSCO, IL · Henry County

OSCO MUTUAL WATER SUPPLY COMPANY, INC. 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): IL0735200
System type: Community Water System
Population served: 80
Service connections: 50
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2007 – February 28, 2007
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
August 24, 2005 – October 18, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2004 – June 30, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2002 – September 30, 2002
Archived
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
October 1, 1993 – August 23, 1994
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
February 1, 2007 – February 28, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 24, 2005 – October 18, 2005	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
April 1, 2004 – June 30, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
September 1, 2002 – September 30, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1993 – August 23, 1994	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	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

November 4, 2025State Violation/Reminder Notice1 linked violation
July 3, 2025State Public Notification requested1 linked violation
July 3, 2025State Violation/Reminder Notice1 linked violation
April 12, 2011State Compliance achieved1 linked violation
December 16, 2008State Violation/Reminder Notice1 linked violation
December 2, 2008State Compliance achieved1 linked violation
November 20, 2007State Compliance achieved1 linked violation
September 27, 2007State Public Notification received2 linked violations
March 27, 2007State Compliance achieved1 linked violation
March 15, 2007State Public Notification requested1 linked violation
March 15, 2007State Violation/Reminder Notice1 linked violation
March 15, 2007State Public Notification requested1 linked violation
March 15, 2007State Violation/Reminder Notice1 linked violation
November 10, 2005State Violation/Reminder Notice2 linked violations
October 18, 2005State Public Notification received3 linked violations
October 18, 2005State Compliance achieved2 linked violations
October 18, 2005State Compliance achieved3 linked violations
September 14, 2005State Violation/Reminder Notice1 linked violation
September 14, 2005State Violation/Reminder Notice1 linked violation
October 7, 2004State Violation/Reminder Notice1 linked violation
October 7, 2004State Public Notification requested1 linked violation
August 23, 2004State Public Notification requested1 linked violation
August 9, 2004State Compliance achieved2 linked violations
August 23, 1994State Compliance achieved1 linked violation
January 29, 1990State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
November 5, 1988State Violation/Reminder Notice2 linked violations

Contact

WHITE, DAVID

309-945-2787

OSCO, IL 61274