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Public water system record

Wilmette

Serves Wilmette, Cook County, IL · 27,087 people served

Federal records show no health-based violations and 3 monitoring/reporting issues for Wilmette in the last ten years. At least one of these issues remains unresolved.

  • IL0313300
  • WILMETTE
  • IL
  • 27,087 served

System profile

Source water Surface water
ZIP 60091
EPA system ID IL0313300

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
3

Key facts

  • Wilmette draws water from 2 surface water intakes.
  • Record on file since 1977, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 1,520 lead and 363 unknown out of 8,875 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.

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Consumer Confidence Rule
OTHER
 Jul 1, 2025 Active

Full record since 1977

EPA's records for Wilmette go back to 1977. Before October 19, 2016 they list no health-based violations and 9 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 9
2020s 0 3

Where the water comes from

Wilmette draws water from 2 surface water intakes. It also has emergency connections to Winnetka and Evanston. 2 other community water systems buy water from Wilmette. 1 other public water system has an emergency connection to Wilmette.

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

Wilmette 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