Is WATERLOO required to publish a Consumer Confidence Report?

Yes. WATERLOO 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 WATERLOO’s next Consumer Confidence Report due?

WATERLOO’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.

WATERLOO, IL · Monroe County

WATERLOO Water System

Consumer Confidence Report status

WATERLOO 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 WATERLOO.

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): IL1330300
System type: Community Water System
Population served: 10,190
Service connections: 4,942
Ownership: local government
Water source: groundwater (wells)

WATERLOO is one of 225 community water systems in Illinois in the 10,001 to 100,000 people size category, serving 10,190 people from groundwater.

As of August 1, 2026, its federal record holds 30 entries between 1977 and 2025, all of which EPA lists as closed.

Of the 30, 28 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 volatile organic chemicals, the Stage 2 Disinfectants and Disinfection Byproducts Rule, and inorganic chemicals.

Violation history

Monitoring, Regular
—
Nitrite
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
CHLOROBENZENE
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
Toluene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
Styrene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
Vinyl chloride
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
April 1, 2025 – June 30, 2025
Resolved
Monitoring, Regular
—
Xylenes, Total
April 1, 2025 – June 30, 2025
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2025 – March 31, 2025
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2025 – March 31, 2025
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
December 1, 2024 – December 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2024 – December 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2023 – December 31, 2023
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2018 – July 23, 2018
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2017 – January 19, 2017
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 8, 2008 – December 9, 2008
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1994 – November 30, 1994
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 1993 – September 30, 1993
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 1993 – August 31, 1993
Archived
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
April 1, 2025 – June 30, 2025	Monitoring, Regular	Nitrite	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	CHLOROBENZENE	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	Toluene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	Styrene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	Vinyl chloride	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 2025 – June 30, 2025	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2025 – March 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2025 – March 31, 2025	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
December 1, 2024 – December 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2018 – July 23, 2018	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2017 – January 19, 2017	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 8, 2008 – December 9, 2008	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
November 1, 1994 – November 30, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 1993 – September 30, 1993	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
August 1, 1993 – August 31, 1993	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
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

October 14, 2025State Compliance achieved1 linked violation
October 14, 2025State Compliance achieved1 linked violation
September 12, 2025State Compliance achieved1 linked violation
September 12, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 28, 2025State Compliance achieved21 linked violations
July 16, 2025State Public Notification requested1 linked violation
July 16, 2025State Violation/Reminder Notice1 linked violation
July 16, 2025State Public Notification requested1 linked violation
July 16, 2025State Violation/Reminder Notice1 linked violation
July 14, 2025State Violation/Reminder Notice20 linked violations
July 14, 2025State Violation/Reminder Notice1 linked violation
July 14, 2025State Public Notification requested20 linked violations
July 14, 2025State Public Notification requested1 linked violation
July 11, 2025State Violation/Reminder Notice1 linked violation
July 11, 2025State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 11, 2025State Public Notification requested1 linked violation
July 11, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
June 26, 2025State Public Notification received1 linked violation
June 26, 2025State Public Notification received1 linked violation
May 21, 2025State Compliance achieved2 linked violations
April 13, 2025State Violation/Reminder Notice2 linked violations
April 13, 2025State Public Notification requested2 linked violations
February 3, 2025State Compliance achieved1 linked violation
February 3, 2025State Compliance achieved1 linked violation
January 24, 2025State Public Notification requested1 linked violation
January 24, 2025State Violation/Reminder Notice1 linked violation
January 24, 2025State Public Notification requested1 linked violation
January 24, 2025State Violation/Reminder Notice1 linked violation
June 20, 2024State Public Notification received1 linked violation
March 7, 2024State Compliance achieved1 linked violation
January 12, 2024State Public Notification requested1 linked violation
January 12, 2024State Violation/Reminder Notice1 linked violation
July 26, 2018State Violation/Reminder Notice1 linked violation
July 23, 2018State Compliance achieved1 linked violation
January 19, 2017State Compliance achieved1 linked violation
January 5, 2017State Violation/Reminder Notice1 linked violation
December 9, 2008State Compliance achieved1 linked violation
October 8, 2008State Violation/Reminder Notice1 linked violation
February 4, 1995State Violation/Reminder Notice1 linked violation
February 4, 1995State Public Notification requested1 linked violation
February 1, 1995State Public Notification received1 linked violation
December 29, 1993State Public Notification received2 linked violations
December 29, 1993State Public Notification received1 linked violation
December 29, 1993State Public Notification received1 linked violation
December 15, 1993State Violation/Reminder Notice1 linked violation
December 15, 1993State Violation/Reminder Notice2 linked violations
December 15, 1993State Public Notification requested1 linked violation
December 15, 1993State Public Notification requested1 linked violation
December 15, 1993State Violation/Reminder Notice1 linked violation
August 11, 1993State Public Notification received1 linked violation

Common questions

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

LANDECK, J. R.

618-939-8600

WATERLOO, IL 62298