DIETERICH, IL · Effingham County

MASON Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of January 15, 2007. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Effingham County, IL.

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): IL0490300
System type: Community Water System
Population served: 396
Service connections: 160
Ownership: local government
Water source: groundwater (wells)

MASON is one of 1,572 community water systems in Illinois in the 500 or fewer people size category, formerly serving 396 people from groundwater.

EPA's federal records list this system as inactive in 2007; the record below is historical.

As of August 1, 2026, its federal record holds 9 entries between 1991 and 1997, all of which EPA lists as closed. Nothing has been added since 1997.

Of the 9, 8 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 and the Lead and Copper Rule.

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 1997 – October 31, 1997
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1997 – September 30, 1997
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1997 – April 30, 1997
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 1996 – December 31, 1996
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1996 – November 30, 1996
Archived
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
October 1, 1996 – October 31, 1996
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1996 – October 31, 1996
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1995 – January 27, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 1991 – February 28, 1991
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 1997 – October 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 1997 – September 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
April 1, 1997 – April 30, 1997	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
December 1, 1996 – December 31, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
November 1, 1996 – November 30, 1996	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1996 – October 31, 1996	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Archived
October 1, 1996 – October 31, 1996	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1995 – January 27, 1997	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
February 1, 1991 – February 28, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

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

Enforcement actions

January 10, 2006State Compliance achieved2 linked violations
August 30, 2005State Public Notification received2 linked violations
August 10, 2005State Public Notification requested2 linked violations
April 19, 1999State Compliance achieved1 linked violation
December 27, 1997State Violation/Reminder Notice1 linked violation
December 27, 1997State Public Notification requested1 linked violation
December 18, 1997State Public Notification received1 linked violation
November 22, 1997State Violation/Reminder Notice1 linked violation
November 22, 1997State Public Notification requested1 linked violation
June 28, 1997State Violation/Reminder Notice1 linked violation
June 28, 1997State Public Notification requested1 linked violation
February 23, 1997State Violation/Reminder Notice1 linked violation
February 23, 1997State Public Notification requested1 linked violation
January 27, 1997State Compliance achieved1 linked violation
January 25, 1997State Violation/Reminder Notice1 linked violation
January 25, 1997State Public Notification requested1 linked violation
December 28, 1996State Violation/Reminder Notice2 linked violations
December 28, 1996State Public Notification requested2 linked violations
November 23, 1996State Public Notification requested1 linked violation
November 23, 1996State Violation/Reminder Notice1 linked violation
April 4, 1991State Violation/Reminder Notice1 linked violation
April 4, 1991State Public Notification requested1 linked violation

Last known contact on file (system is inactive)

KELLEY, THOMAS E.

217-925-5566

DIETERICH, IL 62424