Community Water System · PWS IL0995425
Seneca Mobile Homes LLC
Operator location Morris, Illinois - 79% of 726 violations are health-based (upper-third health share (> 23%)); groundwater source; 10 served per SDWIS.
- 10
- People served (this PWS)
- 726
- EPA violations (this PWS)
- 572
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Seneca Mobile Homes LLC standing, high SDWIS violation third
79% of 726 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 79% is upper-third health share (> 23%).
The verdict
Seneca Mobile Homes LLC sits in the upper third of the sitemap cohort by violation count (726), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (10; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 79% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 726
- Total EPA violations on record
- 79%
- Health-based (MCL / treatment failure)
- 10
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 29
- County
- LaSalle
- School/Daycare
- No
- MCL Violations
- 568
- Monitoring Violations
- 116
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 527 | 2025 |
| Gross Alpha, Excl. Radon and U | MCL | 26 | 2009 |
| Coliform (TCR) | MR | 17 | 1996 |
| Coliform (TCR) | MCL | 15 | 2000 |
| Combined Radium (-226 and -228) | MR | 4 | 2024 |
| Lead and Copper Rule | TT | 4 | 1996 |
| BHC-GAMMA | MR | 3 | 1996 |
| Carbofuran | MR | 3 | 1996 |
| LASSO | MR | 3 | 1996 |
| Heptachlor | MR | 3 | 1996 |
| Heptachlor epoxide | MR | 3 | 1996 |
| 2,4,5-TP | MR | 3 | 1996 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 1996 |
| Chlordane | MR | 3 | 1996 |
| Endrin | MR | 3 | 1996 |
| Diquat | MR | 3 | 1996 |
| Endothall | MR | 3 | 1996 |
| Di(2-ethylhexyl) adipate | MR | 3 | 1996 |
| OXAMYL | MR | 3 | 1996 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 1996 |
| Dinoseb | MR | 3 | 1996 |
| Aldicarb sulfoxide | MR | 3 | 1996 |
| Aldicarb sulfone | MR | 3 | 1996 |
| HEXACHLOROBENZENE | MR | 3 | 1996 |
| 2,4-D | MR | 3 | 1996 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 1996 |
| Dalapon | MR | 3 | 1996 |
| Benzo(a)pyrene | MR | 3 | 1996 |
| Toxaphene | MR | 3 | 1996 |
| Aldicarb | MR | 3 | 1996 |
Violation Count vs. the National Corpus
Seneca Mobile Homes LLC has 726 recorded EPA violations, 98% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 2% carry more. 79% of this system's own violations are health-based (572 of 726), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
726 Higher than most more violations than 98% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Seneca Mobile Homes LLC
572 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IL0995425.
Sources: EPA SDWIS · Illinois EPA, Bureau of Water
Nationwide peers
726 violations · 10 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Seneca Mobile Homes LLC
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Illinois compares on the same EPA violation measures. Illinois systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.