Public water system record
Leyden TWSP Water District
Serves an area of Cook County, IL · 10,000 people served
Federal records show no health-based violations and 5 monitoring/reporting issues for Leyden TWSP Water District 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
- 5
Key facts
- Leyden TWSP Water District buys its water from Melrose Park.
- Record on file since 2001, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 107 lead and 5 unknown out of 3,087 service lines.
Check whether Leyden TWSP Water District 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
Monitoring and reporting
|
Jul 1, 2025 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2017 | Resolved |
Full record since 2001
EPA's records for Leyden TWSP Water District go back to 2001. Before October 19, 2016 they list 3 health-based violations (1 resolved, 2 archived by EPA without a recorded fix) and 10 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 3 | 7 |
| 2010 to October 18, 2016 | 0 | 3 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 4 |
Most recent health-based violation before October 19, 2016: Total Coliform, began May 2007, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2003 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2001 | Archived |
Where the water comes from
Leyden TWSP Water District buys its water from Melrose Park. It lists no wells or intakes of its own. It also has emergency connections to Northlake and Franklin Park.
Buys water from
- Melrose Park Melrose Park, IL
Emergency or part-time connections to
- Northlake North Lake, IL
- Franklin Park Franklin Park, IL
Annual water quality report
Leyden TWSP Water District 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