Public water system record
Tinley Park
Serves Tinley Park, Cook County and Will County, IL · 56,703 people served
Federal records show no health-based violations and 4 monitoring/reporting issues for Tinley Park in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Tinley Park buys its water from Oak Lawn.
- Most recent formal enforcement: signed compliance agreement by Illinois, January 2011.
- Record on file since 1993, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 82 unknown out of 20,321 service lines.
Check whether Tinley 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.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2024 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
Full record since 1993
EPA's records for Tinley Park go back to 1993. Before October 19, 2016 they list no health-based violations and 7 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 0 | 4 |
| 2010 to October 18, 2016 | 0 | 2 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 3 |
Enforcement actions
Illinois regulators took 1 formal enforcement action against Tinley Park in 2011. The most recent was a signed compliance agreement in January 2011.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 7, 2011 | Illinois | Signed compliance agreement | 1 violation: Consumer Confidence Rule |
Where the water comes from
Tinley Park buys its water from Oak Lawn. It lists no wells or intakes of its own. It also has an emergency connection to Orland Park. 3 other community water systems and 1 smaller public system such as schools, businesses or campgrounds buy water from Tinley Park.
Buys water from
- Oak Lawn Oak Lawn, IL
Emergency or part-time connections to
- Orland Park Orland Park, IL
Community systems that buy water from it
- IL American-Fernway Godfrey, IL
- Mokena Mokena, IL
- New Lenox New Lenox, IL
Annual water quality report
Tinley 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