Public water system record
La Salle
Serves LaSalle, LaSalle County, IL · 9,700 people served
Federal records show 6 health-based violations and 4 monitoring/reporting issues for La Salle in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 6
- Resolved
- 6
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- La Salle draws water from 6 wells.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit), 2017.
- Most recent formal enforcement: compliance order (no penalty) by Illinois, August 2022.
- Record on file since 1977, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 146 lead and 3,214 unknown out of 4,181 service lines.
Check whether La Salle 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Apr 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
220 | Jul 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2017 | Resolved | No |
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
|
Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Revised Total Coliform Rule
Monitoring violation
|
Jun 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
Full record since 1977
EPA's records for La Salle go back to 1977. Before October 19, 2016 they list no health-based violations and 41 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 0 | 1 |
| 2000s | 0 | 38 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 3 | 0 |
| 2020s | 3 | 4 |
Enforcement actions
Illinois regulators took 2 formal enforcement actions against La Salle between 2006 and 2022, filed as 4 records in EPA's data. The most recent was a compliance order (no penalty) in August 2022.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 10, 2022 | Illinois | Compliance order (no penalty) | 3 violations (3 health-based): Total Trihalomethanes (TTHMs) |
| Jun 27, 2006 | Illinois | Signed compliance agreement | 2 violations: Public Notice |
What the violations mean
Total Trihalomethanes (TTHMs)
6 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
La Salle draws water from 6 wells. 2 smaller public systems such as schools, businesses or campgrounds buy water from La Salle.
Annual water quality report
La Salle 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