Public water system record
Seneca Mobile Homes LLC
Serves Seneca, LaSalle County, IL · 10 people served
Federal records show 5 health-based violations and 5 monitoring/reporting issues for Seneca Mobile Homes LLC in the last ten years. The most serious issue in this window was a Combined Radium (-226 and -228) violation that EPA lists as archived, not resolved.
System profile
Source water
Groundwater
ZIP
60450
EPA system ID
IL0995425
- Health-based violations, last 10 years
- 5
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 5
- Any acute record
- No
- Monitoring issues, last 10 years
- 5
Key facts
- Seneca Mobile Homes LLC draws water from 1 well.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit), 2025.
- Most recent formal enforcement: compliance order (no penalty) by Illinois, March 2025.
- Record on file since 1986, with 56 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 29 service lines.
Check whether Seneca Mobile Homes LLC 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 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
340 | Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
340 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 10 pCi/L, federal limit 5 pCi/L (2 times the limit)
|
340 | Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
|
340 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
|
340 | Oct 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Oct 17, 2025 | Resolved |
|
Public Notice
OTHER
|
Oct 17, 2025 | Resolved |
|
Public Notice
OTHER
|
Mar 10, 2025 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
Full record since 1986
EPA's records for Seneca Mobile Homes LLC go back to 1986. Before October 19, 2016 they list 56 health-based violations (51 resolved, 5 archived by EPA without a recorded fix) and 38 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 0 |
| 1990s | 10 | 38 |
| 2000s | 34 | 0 |
| 2010 to October 18, 2016 | 11 | 0 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 5 | 4 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began July 2012, Resolved.
Show all 56 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 10 pCi/L, federal limit 5 pCi/L (2 times the limit)
|
Jul 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Apr 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jan 1, 2012 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 10 pCi/L, federal limit 5 pCi/L (2 times the limit)
|
Oct 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jul 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Apr 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jan 1, 2011 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Oct 1, 2010 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Jul 1, 2010 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 13 pCi/L, federal limit 5 pCi/L (2.6 times the limit)
|
Apr 1, 2010 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 13 pCi/L, federal limit 5 pCi/L (2.6 times the limit)
|
Jan 1, 2010 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Oct 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Jul 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Apr 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jan 1, 2009 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Jan 1, 2009 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Oct 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Oct 1, 2008 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 20 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
Jul 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jul 1, 2008 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Apr 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Apr 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Jan 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 11 pCi/L, federal limit 5 pCi/L (2.2 times the limit)
|
Oct 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Jul 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Apr 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Jan 1, 2007 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Oct 1, 2006 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Jul 1, 2006 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Apr 1, 2006 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 12 pCi/L, federal limit 5 pCi/L (2.4 times the limit)
|
Jan 1, 2006 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jul 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Apr 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jul 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Apr 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2004 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jul 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Apr 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2003 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2000 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 1998 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Feb 22, 1996 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1996 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1994 | Archived |
6 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
Illinois regulators and EPA took 7 formal enforcement actions against Seneca Mobile Homes LLC between 2004 and 2025, filed as 9 records in EPA's data. The most recent was a compliance order (no penalty) in March 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 25, 2025 | Illinois | Compliance order (no penalty) | 3 violations (3 health-based): Combined Radium (-226 and -228) |
| Dec 22, 2011 | EPA | Compliance order (no penalty) | 24 violations (24 health-based): Combined Radium (-226 and -228) |
| Jan 6, 2011 | Illinois | Compliance order (no penalty) | 40 violations (40 health-based): Combined Radium (-226 and -228) |
| Jan 6, 2011 | EPA | Compliance order (no penalty) | 33 violations (33 health-based): Combined Radium (-226 and -228) |
| May 17, 2006 | Illinois | Compliance order (no penalty) | 44 violations (44 health-based): Combined Radium (-226 and -228) |
| May 17, 2006 | EPA | Compliance order (no penalty) | 18 violations (18 health-based): Combined Radium (-226 and -228) |
| May 24, 2004 | Illinois | Signed compliance agreement | 20 violations (20 health-based): Combined Radium (-226 and -228) |
What the violations mean
Combined Radium (-226 and -228)
5 incidentsTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Seneca Mobile Homes LLC draws water from 1 well.
Annual water quality report
Seneca Mobile Homes LLC 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 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Seneca Mobile Homes LLC for a copy.
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