Public water system record
Mokena
Serves Mokena, Will County, IL · 19,887 people served
Federal records show no health-based violations and 5 monitoring/reporting issues for Mokena 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
- 5
Key facts
- Mokena buys its water from Tinley Park.
- Record on file since 1977, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 7,184 service lines.
Check whether Mokena 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 |
|---|---|---|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
Full record since 1977
EPA's records for Mokena go back to 1977. Before October 19, 2016 they list 2 health-based violations (1 resolved, 1 archived by EPA without a recorded fix) and 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 1 | 4 |
| 2010 to October 18, 2016 | 1 | 0 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 4 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2012, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1996 | Archived |
Where the water comes from
Mokena buys its water from Tinley Park. EPA also lists 3 wells, all for emergency, seasonal or other part-time use. 2 smaller public systems such as schools, businesses or campgrounds buy water from Mokena.
Buys water from
- Tinley Park Tinley Park, IL
Annual water quality report
Mokena 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