Public water system record
Northfield
Serves Northfield, Cook County, IL · 5,470 people served
Federal records show no health-based violations and no monitoring or reporting issues for Northfield in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Northfield buys its water from Winnetka.
- Record on file since 1992, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 85 lead and 6 unknown out of 2,060 service lines.
Check whether Northfield serves your address
Health-based violations
Since October 2016Violation 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 1992
EPA's records for Northfield go back to 1992. Before October 19, 2016 they list 1 health-based violation (1 resolved) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Lead and Copper Rule, began December 1992, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Treatment technique failure
|
Dec 7, 1992 | Resolved |
Where the water comes from
Northfield buys its water from Winnetka. It lists no wells or intakes of its own. It also has an emergency connection to Glenview. 2 other public water systems have emergency connections to Northfield.
Buys water from
- Winnetka Winnetka, IL
Emergency or part-time connections to
- Glenview Glenview, IL
Annual water quality report
Northfield 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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