Is OSCO MUTUAL WATER SUPPLY COMPANY, INC. required to publish a Consumer Confidence Report?

Yes. OSCO MUTUAL WATER SUPPLY COMPANY, INC. is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is OSCO MUTUAL WATER SUPPLY COMPANY, INC.’s next Consumer Confidence Report due?

OSCO MUTUAL WATER SUPPLY COMPANY, INC.’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

OSCO, IL · Henry County

OSCO MUTUAL WATER SUPPLY COMPANY, INC. Water System

Consumer Confidence Report status

OSCO MUTUAL WATER SUPPLY COMPANY, INC. must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for OSCO MUTUAL WATER SUPPLY COMPANY, INC..

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)

OSCO MUTUAL WATER SUPPLY COMPANY, INC. is one of 1,572 community water systems in Illinois in the 500 or fewer people size category, serving 80 people from groundwater.

As of August 1, 2026, its federal record holds 6 entries between 1977 and 2007, all of which EPA lists as closed. Nothing has been added since 2007.

Of the 6, 4 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Public Notice Rule and Revised PN Rule.

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2007 – February 28, 2007
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2007 – March 27, 2007
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 8, 2005 – October 18, 2005
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
January 1, 2007 – March 27, 2007	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 8, 2005 – October 18, 2005	Public Notification Violation for NPDWR Violation	Public Notice	—	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 Violation/Reminder Notice1 linked violation
March 15, 2007State Public Notification requested1 linked violation
March 15, 2007State Public Notification requested1 linked violation
March 15, 2007State Violation/Reminder Notice1 linked violation
October 18, 2005State Compliance achieved3 linked violations
October 18, 2005State Public Notification received3 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
December 9, 1989State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record

Common questions

Is OSCO MUTUAL WATER SUPPLY COMPANY, INC. required to publish a Consumer Confidence Report?: Yes. OSCO MUTUAL WATER SUPPLY COMPANY, INC. is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is OSCO MUTUAL WATER SUPPLY COMPANY, INC.’s next Consumer Confidence Report due?: OSCO MUTUAL WATER SUPPLY COMPANY, INC.’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OSCO MUTUAL WATER SUPPLY COMPANY, INC. have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for OSCO MUTUAL WATER SUPPLY COMPANY, INC..
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

WHITE, DAVID

309-945-2787

OSCO, IL 61274