Public water system record
Oak Park
Serves Oak Park, Cook County, IL · 54,583 people served
Federal records show no health-based violations and no monitoring or reporting issues for Oak Park 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
- Oak Park buys its water from Chicago.
- Record on file since 1992, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 7,034 lead and 1,488 unknown out of 12,521 service lines.
Check whether Oak Park 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 Oak Park go back to 1992. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 6 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 6 |
Most recent health-based violation before October 19, 2016: Lead and Copper Rule, began January 1994, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1994 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Dec 7, 1992 | Resolved |
Where the water comes from
Oak Park buys its water from Chicago. It lists no wells or intakes of its own.
Buys water from
- Chicago Chicago, IL
Annual water quality report
Oak Park 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