Is MOUNT STERLING required to publish a Consumer Confidence Report?

Yes. MOUNT STERLING 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 MOUNT STERLING’s next Consumer Confidence Report due?

MOUNT STERLING’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.

MT. STERLING, IL · Brown County

MOUNT STERLING Water System

Consumer Confidence Report status

MOUNT STERLING 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 MOUNT STERLING.

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): IL0090100
System type: Community Water System
Population served: 3,271
Service connections: 1,258
Ownership: local government
Water source: groundwater (wells)

MOUNT STERLING is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 3,271 people from groundwater.

As of August 1, 2026, its federal record holds 6 entries between 1996 and 2025, all of which EPA lists as closed.

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 Consumer Confidence Rule.

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2025 – October 31, 2025
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2025 – October 31, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2007 – July 24, 2007
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
June 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2005 – June 30, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1996 – January 31, 1996
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
October 1, 2025 – October 31, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2025 – October 31, 2025	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2007 – July 24, 2007	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 2005 – June 30, 2005	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 2005 – June 30, 2005	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 1996 – January 31, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

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

Enforcement actions

December 16, 2025State Public Notification requested1 linked violation
December 16, 2025State Violation/Reminder Notice1 linked violation
December 16, 2025State Public Notification requested1 linked violation
December 16, 2025State Violation/Reminder Notice1 linked violation
November 10, 2025State Compliance achieved2 linked violations
October 4, 2013State Compliance achieved1 linked violation
August 27, 2013State Violation/Reminder Notice1 linked violation
January 15, 2010State Compliance achieved1 linked violation
January 12, 2010State Violation/Reminder Notice1 linked violation
November 24, 2009State Compliance achieved1 linked violation
October 30, 2009State Violation/Reminder Notice1 linked violation
July 24, 2007State Compliance achieved1 linked violation
July 16, 2007State Violation/Reminder Notice1 linked violation
January 10, 2006State Compliance achieved2 linked violations

Common questions

Is MOUNT STERLING required to publish a Consumer Confidence Report?: Yes. MOUNT STERLING 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 MOUNT STERLING’s next Consumer Confidence Report due?: MOUNT STERLING’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MOUNT STERLING have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for MOUNT STERLING.
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

BUSS, DUSTY L.

217-773-2136

MT. STERLING, IL 62353