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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| C & K Industrial Services, Inc. | Independence, OH | — | Septage Hauler | 62422188 |
| Campbell's Septic Service, Inc. | Troy, OH | — | Septage Hauler | 62234711 |
| Carroll Ace Portable Restrooms | Waynesburg, OH | — | Septage Hauler | B0575902 |
| Cee Bee Wastewater LLC | Painesville, OH | — | Septage Hauler | 67718382 |
| Champaign Acme Septic Service | Urbana, OH | — | Septage Hauler | 95B4Z7105 |
| Chandler Septic & Services LLC | Frazeysburg, OH | — | Septage Hauler | Q968147589 |
| Chuck's Septic Tank Sewer & Drain Cleaning, Inc. | Grove City, OH | — | Septage Hauler | BND3492334 |
| CJ's Porta-A-Potty | North Benton, OH | — | Septage Hauler | 71729108 |
| Clark Bevan Sanitary Service | Springfield, OH | — | Septage Hauler | 101347188 |
| Clean Streams Portable Restrooms LLC. | Lynchburg, OH | — | Septage Hauler | 7901341918 |
| Clermont A Advanced Septic, LLC | Pleasant Plain, OH | — | Septage Hauler | OH5974284 |
| Clinton Blairs Farm Excavating LLC | Sabina, OH | — | Septage Hauler | 67820048 |
| CLN Portable Restroom Service Company | Burton, OH | — | Septage Hauler | 999076827 |
| Clyde Pertuset Septic Service | Peebles, OH | — | Septage Hauler | 64656171 |
| Cole's Septic Services, an Aris Company LLC Company | Chardon, OH | — | Septage Hauler | 2663548 |
| Columbiana Family Flush Septic | Lisbon, OH | — | Septage Hauler | Q968162491 |
| Complete Septic | Goshen, OH | — | Septage Hauler | 7900454414 |
| Coopers Sanitary Service | Englewood, OH | — | Septage Hauler | 62229654 |
| Coshocton Forest Hill Septic Service, LLC | Fresno, OH | — | Septage Hauler | 66438982 |
| Country Court Mobile Home Park | — | — | Septage Hauler | BND410997K |
| County Sanitary Service Inc. | Chillicothe, OH | — | Septage Hauler | 7901029032 |
| County Waste Services Ltd | unionville, OH | — | Septage Hauler | 62225002 |
| Cowboy Miller Septic Pumping, Inc. | Deerfield, OH | — | Septage Hauler | 71611961 |
| CPR Drain Cleaning Inc. | Columbus, OH | — | Septage Hauler | OH13396 |
| Crowell Plumbing | Eaton, OH | — | Septage Hauler | B0580416 |
| CT Brown Sanitation Service | Xenia, OH | — | Septage Hauler | 62245654 |
| Custom Fit Plumbing LLC | Eaton, OH | — | Septage Hauler | 67919252 |
| Cuyahaga Pioneer Patios LLC | Chagrin Falls, OH | — | Septage Hauler | 67868406 |
| Cuyahoga Advanced Plumbing & Drain | Cleveland, OH | — | Septage Hauler | 9027698 |
| CWS Environmental | Bowling Green, OH | — | Septage Hauler | 601085190 |
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