ALGONQUIN, IL · McHenry County

ALGONQUIN Water System

Current status

No open violations on record as of July 4, 2026.

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): IL1110050
System type: Community Water System
Population served: 30,700
Service connections: 11,904
Ownership: local government
Water source: groundwater (wells)

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
August 16, 2007 – August 21, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2006 – August 31, 2006
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
October 1, 1999 – December 31, 1999
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
April 1, 1999 – June 30, 1999
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 1999 – June 30, 1999
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1998 – November 30, 1998
Archived
Water Quality Parameter M/R
—
Lead and Copper Rule
October 1, 1998 – December 31, 1998
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 1998 – September 30, 1998
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1998 – April 30, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1994 – October 31, 1994
Archived
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
September 2, 1993 – December 12, 1994
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
October 1, 1992 – June 28, 1993
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1992 – June 30, 1992
Archived
Maximum Contaminant Level Violation, Average
Health-based
Barium
June 1, 1986 – June 22, 1987
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Barium
June 1, 1983 – May 31, 1986
Archived
Maximum Contaminant Level Violation, Average
Health-based
Barium
June 1, 1980 – May 31, 1983
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
August 16, 2007 – August 21, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
August 1, 2006 – August 31, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 1999 – December 31, 1999	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
April 1, 1999 – June 30, 1999	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 1999 – June 30, 1999	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
November 1, 1998 – November 30, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1998 – December 31, 1998	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 1998 – September 30, 1998	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
April 1, 1998 – April 30, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1994 – October 31, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
September 2, 1993 – December 12, 1994	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
October 1, 1992 – June 28, 1993	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
June 1, 1992 – June 30, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
June 1, 1986 – June 22, 1987	Maximum Contaminant Level Violation, Average	Barium	Health-based	Resolved
June 1, 1983 – May 31, 1986	Maximum Contaminant Level Violation, Average	Barium	Health-based	Archived
June 1, 1980 – May 31, 1983	Maximum Contaminant Level Violation, Average	Barium	Health-based	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

September 10, 2007State Violation/Reminder Notice1 linked violation
August 21, 2007State Compliance achieved1 linked violation
August 14, 2007State Public Notification received2 linked violations
March 1, 2007State Compliance achieved2 linked violations
October 10, 2006State Public Notification received1 linked violation
September 13, 2006State Violation/Reminder Notice1 linked violation
September 13, 2006State Public Notification requested1 linked violation
August 15, 2006State Public Notification requested1 linked violation
August 15, 2006State Violation/Reminder Notice1 linked violation
August 14, 2006State Violation/Reminder Notice1 linked violation
August 14, 2006State Public Notification requested1 linked violation
June 30, 2001State Compliance achieved7 linked violations
June 30, 1999State Compliance achieved1 linked violation
January 15, 1999State Violation/Reminder Notice1 linked violation
January 15, 1999State Public Notification requested1 linked violation
June 27, 1998State Violation/Reminder Notice1 linked violation
June 27, 1998State Public Notification requested1 linked violation
December 31, 1994State Violation/Reminder Notice1 linked violation
December 31, 1994State Public Notification requested1 linked violation
December 12, 1994State Compliance achieved1 linked violation
November 1, 1994State Compliance achieved1 linked violation
April 18, 1994State Public Notification requested1 linked violation
April 18, 1994State Violation/Reminder Notice1 linked violation
July 15, 1993State Compliance achieved2 linked violations
August 8, 1992State Public Notification requested1 linked violation
June 22, 1987State Compliance achieved1 linked violation
September 30, 1980State Public Notification received17 linked violations

Contact

BADRAN, NADIM

847-658-2700

ALGONQUIN, IL 60102