COLP, IL · Williamson County

COLP Water System

Current status

1 open health-based violation on record as of July 4, 2026, alongside 1 other open item(s). See the violation history below for contaminant and status details.

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): IL1990200
System type: Community Water System
Population served: 506
Service connections: 272
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025
Unaddressed
LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Unaddressed
Public Notification Violation for NPDWR Violation
—
Public Notice
July 11, 2024 – June 1, 2023
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – July 1, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2023 – July 1, 2025
Resolved
Monitoring and Reporting (DBP)
—
Chloramine
October 1, 2014 – December 30, 2014
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2011 – October 24, 2011
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

Unaddressed no corrective action on record yetResolved 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
July 2, 2025	Notification, Known or Potential LSL	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
October 17, 2024	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Unaddressed
July 11, 2024 – June 1, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2024 – July 1, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2023 – July 1, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
October 1, 2014 – December 30, 2014	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
July 1, 2011 – October 24, 2011	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

August 4, 2025State Public Notification received1 linked violation
July 22, 2025State Violation/Reminder Notice1 linked violation
July 22, 2025State Public Notification requested1 linked violation
July 3, 2025State Public Notification requested1 linked violation
July 3, 2025State Violation/Reminder Notice1 linked violation
July 1, 2025State Compliance achieved2 linked violations
September 16, 2024State Public Notification received1 linked violation
August 22, 2024State Violation/Reminder Notice1 linked violation
July 31, 2024State Violation/Reminder Notice1 linked violation
December 18, 2023State Violation/Reminder Notice1 linked violation
September 11, 2023State Compliance achieved1 linked violation
July 11, 2023State Public Notification requested1 linked violation
July 11, 2023State Violation/Reminder Notice1 linked violation
June 1, 2023State Compliance achieved1 linked violation
November 22, 2019State Compliance achieved1 linked violation
November 4, 2019State Violation/Reminder Notice1 linked violation
June 26, 2015State Public Notification received1 linked violation
June 26, 2015State Public Notification received1 linked violation
December 30, 2014State Compliance achieved2 linked violations
December 15, 2014State Public Notification requested1 linked violation
December 15, 2014State Public Notification requested1 linked violation
December 15, 2014State Violation/Reminder Notice1 linked violation
December 15, 2014State Violation/Reminder Notice1 linked violation
September 28, 2014State Compliance achieved1 linked violation
June 13, 2014State Public Notification received1 linked violation
October 15, 2013State Public Notification requested1 linked violation
October 15, 2013State Violation/Reminder Notice2 linked violations
October 24, 2011State Compliance achieved1 linked violation
October 16, 2007State Compliance achieved1 linked violation
October 15, 2007State Consent Decree/Judgement3 linked violations
November 17, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
November 17, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record

Contact

CLARK, MARCELLA

618-944-1890

COLP, IL 62921