| Company | Location | Certifications | License # |
|---|---|---|---|
| Cameron Gerth Dba Head Honcho Llc | — | Septage Hauler | — |
| Curtis Wells Dba Clean Line Sewer, Septic & Plumbing | — | Septage Hauler | — |
| Daniel Wasso Dba Perfect Potty Inc. | — | Septage Hauler | — |
| Danville Septic Service, Inc. | — | Septage Hauler | — |
| Doug Stremme Dba Stremme Septic Services, Inc. | — | Septage Hauler | — |
| Heidrick Septic Service, Inc. | — | Septage Hauler | — |
| Kooi And Company Llc Dba Redbox + Northwest Indiana And South Chicagoland | — | Septage Hauler | — |
| Liquid Environmental Solutions Of Illinois, Llc, Dba Liquid Environmental Solutions | — | Septage Hauler | — |
| Lrd Portables, Llc, Dba Pitstop; Johnson Johns; Joy'S Johns; J.L. Hurt Portable Restrooms | — | Septage Hauler | — |
| Randy Hiltz Dba Hiltz Portable Sanitation Inc. | — | Septage Hauler | — |
| Richard Roggenburg Dba Nature, Inc | — | Septage Hauler | — |
11 companies in the Indiana IDEM approved septage management facilities are based in State of Illinois County as of 2026-07-23. Companies based elsewhere in Indiana also commonly serve the county.
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