MUNDELEIN, IL · Lake County

SYLVAN LAKE 1ST SUBDIVISION Water System

Current status

3 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): IL0977100
System type: Community Water System
Population served: 210
Service connections: 71
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025
Unaddressed
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2025
Unaddressed
LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024 – April 30, 2025
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2024
Unaddressed
Monitoring, Regular
—
Nitrate
January 1, 2024 – December 31, 2024
Archived
Monitoring, Regular
—
Nitrate
January 1, 2024 – December 31, 2024
Archived
Monitoring, Regular
—
Fluoride
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Mercury
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Mercury
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Antimony, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Antimony, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Selenium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Selenium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Thallium, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Thallium, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Cadmium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Cadmium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Arsenic
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Arsenic
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Beryllium, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Beryllium, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Barium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Barium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Chromium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Chromium
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Nickel
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Nickel
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Fluoride
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2020 – December 31, 2025
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
November 9, 2003 – November 10, 2003
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 2003 – October 31, 2003
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
August 1, 2003 – August 31, 2003
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2003 – August 31, 2003
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
July 1, 2003 – July 31, 2003
Archived
Monitoring, Regular
—
Nitrate
January 1, 2003 – December 31, 2003
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
July 1, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Unaddressed
October 17, 2024 – April 30, 2025	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Resolved
October 1, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Unaddressed
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrate	—	Archived
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrate	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Fluoride	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Mercury	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Mercury	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Antimony, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Antimony, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Selenium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Selenium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Thallium, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Thallium, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Cadmium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Cadmium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Arsenic	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Arsenic	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Barium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Barium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Chromium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Chromium	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Nickel	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Nickel	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Fluoride	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
November 9, 2003 – November 10, 2003	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2003 – October 31, 2003	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 2003 – August 31, 2003	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 2003 – August 31, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 2003 – July 31, 2003	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate	—	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

July 29, 2025State Violation/Reminder Notice2 linked violations
July 7, 2025State Public Notification received2 linked violations
July 7, 2025State Public Notification received1 linked violation
July 7, 2025State Public Notification received1 linked violation
July 3, 2025State Public Notification requested2 linked violations
July 2, 2025State Public Notification requested2 linked violations
January 21, 2025State Violation/Reminder Notice2 linked violations
January 21, 2025State Violation/Reminder Notice1 linked violation
January 21, 2025State Public Notification requested3 linked violations
October 12, 2024State Public Notification requested3 linked violations
July 16, 2009State Violation/Reminder Notice1 linked violation
July 10, 2009State Compliance achieved2 linked violations
July 6, 2004State Compliance achieved3 linked violations
June 23, 2004State Public Notification received3 linked violations
February 24, 2004State Violation/Reminder Notice4 linked violations
December 8, 2003State Violation/Reminder Notice3 linked violations
November 14, 2003State Public Notification received4 linked violations
September 11, 2003State Violation/Reminder Notice6 linked violations

Contact

JOHNSON, WAYNE

224-280-0188

MUNDELEIN, IL 60060