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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| M.E. Good & Sons | Logan, OH | — | Septage Hauler | CBE1048409 |
| Mack Industries, Inc. | Valley City, OH | — | Septage Hauler | 108150369 |
| Madison All Ohio Portable Toilets LLC | Mount Sterling, OH | — | Septage Hauler | Q968144137 |
| Mahoning Charlie Hoffman Septic Services | Berlin Center, OH | — | Septage Hauler | 7900445112 |
| Manns Excavating | Kenton, OH | — | Septage Hauler | 2398873 |
| Mansfield Sanitation LLC | Venango, PA | — | Septage Hauler | B0591110 |
| Marion Hanes Environmental, Inc. | Caledonia, OH | — | Septage Hauler | 71604404 |
| Marshall Septic Services | Washington Court, OH | — | Septage Hauler | Q968199724 |
| Mastin Site Services, LLC | Whitehouse, OH | — | Septage Hauler | 64771300 |
| Matt Morjock Excavating LLC | New Springfield, OH | — | Septage Hauler | 67700610 |
| Mayes and Sons Plumbing Company | Garrettsville, OH | — | Septage Hauler | 67417718 |
| Mayfield Septic Services | Cumberland, OH | — | Septage Hauler | OH13439 |
| McClellan Septic Tank Service LLC | Hinckley, OH | — | Septage Hauler | B0578568 |
| McKeever's | Urbana, OH | — | Septage Hauler | OH13430 |
| Medina ABC Plumbing & Drain INC. | Wadsworth, OH | — | Septage Hauler | 7901320130 |
| Meigs Dais Septic Service & Excavating | Pomeroy, OH | — | Septage Hauler | 62314258 |
| Mel's Septic Tank Service | Goshen, OH | — | Septage Hauler | BND3430347 |
| Mercer Grier's Power Digging LLC | Rockford, OH | — | Septage Hauler | BND358583 |
| Metamorphosis Holding , LLC | Chagrin Falls, OH | — | Septage Hauler | 67894358 |
| Miami Accurate Septic Services LLC | Laura, OH | — | Septage Hauler | 2631145 |
| Miami Valley Septic Service | Springfield, OH | — | Septage Hauler | 2397402 |
| Michael McAfee | Portland, IN | — | Septage Hauler | 70645672 |
| Mike Hensley Plumbing, Inc | Cincinnati, OH | — | Septage Hauler | 71614301 |
| Mike's Sanitation Inc. | New Bremen, OH | — | Septage Hauler | 999442271 |
| Miller Boat Line | Put-in- Bay, OH | — | Septage Hauler | BND408775K |
| Miller Septic LLC | Berlin, OH | — | Septage Hauler | 62235373 |
| MJC Septic Services, LLC | Ostrander, OH | — | Septage Hauler | B150063086 |
| Monroe Bedford Septic Tank and Sewer Cleaning Company | Temperance, MI | — | Septage Hauler | 71614285 |
| Montgomery Chuck Nasty's Portable Toilet Service | Dayton, OH | — | Septage Hauler | Q968145680 |
| Moon Septic Tank Cleaning | Eaton, OH | — | Septage Hauler | 95CDF1288 |
| Moore's Septic Services LLC | Stoutsville, OH | — | Septage Hauler | 999262058 |
| Morris Drain Service LLC | Youngtown, OH | — | Septage Hauler | 7901055303 |
| Morris Environmental and Sanitation | Avon, OH | — | Septage Hauler | 67701759 |
| Morrow Tidy Tim's, Inc. | Mount Gilead, OH | — | Septage Hauler | B8927860 |
| MPS Services dba Stinkys | Shreve, OH | — | Septage Hauler | 62226644 |
| Mr. Clean Port A Pottie | Springfield, OH | — | Septage Hauler | 66454377 |
| MT Service Inc DBA Miller Portables | Berlin, OH | — | Septage Hauler | 62235420 |
| Mullis Septic Service | Cincinnati, OH | — | Septage Hauler | 95CPL3019 |
| Munn Septic Tank Cleaning, an Aris LLC Company | Chargrin Falls, OH | — | Septage Hauler | 2663520 |
| Muskingum A&J Services | Zanesville, OH | — | Septage Hauler | B0579213 |
| Muskingum Watershed Conservancy District | New Philadelphia, OH | — | Septage Hauler | B0578933 |
| Myers Land Service LLC | Bethel, OH | — | Septage Hauler | 67007981 |
| Myers Septic Service, LLC | Belpre, OH | — | Septage Hauler | B0578060 |
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