Public water system record
Chenoa
Serves Chenoa, McLean County, IL · 1,785 people served
Federal records show 8 health-based violations and 7 monitoring/reporting issues for Chenoa 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
- 8
- Resolved
- 8
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- Chenoa draws water from 3 wells (1 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.12 mg/L, federal limit 0.08 mg/L (1.5 times the limit), 2023.
- Most recent formal enforcement: compliance order (no penalty) by Illinois, May 2023.
- Record on file since 1977, with 6 health-based violations before October 19, 2016.
- Lead pipe inventory: 35 lead and 465 unknown out of 862 service lines.
Check whether Chenoa 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 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Oct 1, 2023 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Jul 1, 2023 | Resolved | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Apr 2, 2023 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.107 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
220 | Apr 1, 2023 | Resolved | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Mar 1, 2023 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.12 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
|
220 | Jan 1, 2023 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2022 | Resolved | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Oct 1, 2019 | 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
|
Jul 1, 2025 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2025 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Apr 1, 2025 | Active |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
Full record since 1977
EPA's records for Chenoa go back to 1977. Before October 19, 2016 they list 6 health-based violations (5 resolved, 1 archived by EPA without a recorded fix) and 7 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 1 | 1 |
| 1980s | 4 | 0 |
| 1990s | 1 | 0 |
| 2000s | 0 | 4 |
| 2010 to October 18, 2016 | 0 | 2 |
| October 19, 2016 to 2019 | 1 | 0 |
| 2020s | 7 | 7 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began May 1991, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
May 1, 1991 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
May 1, 1987 | Resolved |
|
Fluoride
Contaminant limit exceeded
|
May 1, 1985 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
May 1, 1983 | Resolved |
|
Fluoride
Contaminant limit exceeded
|
May 1, 1982 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
May 22, 1979 | Resolved |
Enforcement actions
Illinois regulators took 2 formal enforcement actions against Chenoa between 1990 and 2023, filed as 6 records in EPA's data. The most recent was a compliance order (no penalty) in May 2023.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 17, 2023 | Illinois | Compliance order (no penalty) | 5 violations (5 health-based): Total Trihalomethanes (TTHMs) |
| Jan 11, 1990 | Illinois | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
What the violations mean
Total Trihalomethanes (TTHMs)
5 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Lead and Copper Rule
3 incidentsThe system did not complete a treatment step or action that the Lead and Copper Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Chenoa draws water from 3 wells (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Chenoa 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