Public water system record
Wenona
Serves Wenona, Marshall County, IL · 974 people served
Federal records show 1 health-based violation and 6 monitoring/reporting issues for Wenona in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 6
Key facts
- Wenona draws water from 2 wells.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit), 2024.
- Most recent formal enforcement: compliance order (no penalty) by Illinois, March 2025.
- Record on file since 1977, with 11 health-based violations before October 19, 2016.
Check whether Wenona 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 |
|---|---|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Oct 1, 2024 | Resolved | No |
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 | Active |
|
Public Notice
OTHER
|
Jan 3, 2025 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
Full record since 1977
EPA's records for Wenona go back to 1977. Before October 19, 2016 they list 11 health-based violations (10 resolved, 1 archived by EPA without a recorded fix) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1980s | 5 | 0 |
| 1990s | 6 | 2 |
| 2010 to October 18, 2016 | 0 | 1 |
| 2020s | 1 | 6 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began July 1998, Resolved.
Show all 11 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jul 1, 1998 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1995 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1994 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1992 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1992 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jun 1, 1989 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1988 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jun 1, 1985 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 25, 1984 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jun 1, 1981 | Resolved |
Enforcement actions
Illinois regulators took 1 formal enforcement action against Wenona in 2025. The most recent was a compliance order (no penalty) in March 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 31, 2025 | Illinois | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
What the violations mean
Combined Radium (-226 and -228)
1 incidentTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Wenona draws water from 2 wells.
Annual water quality report
Wenona 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