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Public water system record

Grayslake

Serves Grayslake, Lake County, IL · 21,248 people served

Federal records show no health-based violations and no monitoring or reporting issues for Grayslake in the last ten years.

  • IL0970250
  • GRAYSLAKE
  • IL
  • 21,248 served

System profile

Source water Purchased surface water
ZIP 60030
EPA system ID IL0970250

Verify this system on EPA ECHO →

Health-based violations, last 10 years
0
Resolved
0
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Grayslake buys its water from Central Lake County Jawa.
  • Record on file since 1977, with 6 health-based violations before October 19, 2016.
  • Lead pipe inventory: 334 lead and 184 unknown out of 7,584 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

None since October 2016, and no monitoring or reporting violations either.

Full record since 1977

EPA's records for Grayslake go back to 1977. Before October 19, 2016 they list 6 health-based violations (2 resolved, 4 archived by EPA without a recorded fix) and 5 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 1
1990s 5 2
2000s 1 2

Most recent health-based violation before October 19, 2016: Total Coliform, began September 2000, Archived.

Show all 6 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Sep 1, 2000 Archived
Total Coliform
Contaminant limit exceeded
 Aug 1, 1999 Archived
Lead and Copper Rule
Treatment technique failure
 Jan 1, 1994 Resolved
Lead and Copper Rule
Treatment technique failure
 Dec 21, 1992 Resolved
Total Coliform
Contaminant limit exceeded
 Oct 1, 1992 Archived
Total Coliform
Contaminant limit exceeded
 Oct 1, 1991 Archived

Where the water comes from

Grayslake buys its water from Central Lake County Jawa. EPA also lists 2 wells, all for emergency, seasonal or other part-time use. 2 smaller public systems such as schools, businesses or campgrounds buy water from Grayslake.

Buys water from

Annual water quality report

Grayslake must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Illinois.

Certified drinking water labs by state EPA guidance for private wells