| Company | Location | Certifications | License # |
|---|---|---|---|
| Advanced Sewer Services Inc. | — | Septage Hauler | — |
| Bruce Septic And Repair, Inc. | — | Septage Hauler | — |
| Downing Plumbing & Heating, Inc., Dba Downing Plumbing | — | Septage Hauler | — |
| Eagle Septic Services Llc | — | Septage Hauler | — |
| FreeFlow Environmental, Inc. | — | Septage Hauler | — |
| Great Lakes Industrial Environmental Construction Llc | — | Septage Hauler | — |
| N H Environmental Group, Inc, Dba Tierra Environmental And Industrial Services, Inc. | — | Septage Hauler | — |
| Potty Time Llc | — | Septage Hauler | — |
| Premier Porta Potty Inc. | — | Septage Hauler | — |
| Serenity Environmental Services, Inc. | — | Septage Hauler | — |
| Service Sanitation, Inc. | — | Septage Hauler | — |
| Tlc Plumbing, Inc. | — | Septage Hauler | — |
| Wesley Feikema & Son Sanitation Service, Inc., Dba Feikema Plumbing & Sanitation | — | Septage Hauler | — |
| Willie Westmoreland Dba Jack & Vernon'S Septic Service | — | Septage Hauler | — |
14 companies in the Indiana IDEM approved septage management facilities are based in Lake County as of 2026-07-23. Companies based elsewhere in Indiana also commonly serve the county.
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