| intCompanyID | Company Name | Phone | Fax | Certification Status |
| 581 | A+ Onsite* | (360) 830-4765 | (360) 830-4766 | Active |
| 6443 | AAA Septic & Plumbing LLC | (425) 533-7148 | | Active |
| 6795 | AAA Septic LLC* | (360) 427-6110 | | Active |
| 693 | A-Advanced Septic Service Inc. | (253) 435-9999 | | Active |
| 454 | A-Bell Excavating* | (253) 896-0043 | | Active |
| 448 | All County Operations* | (360) 779-9609 | (360) 633-1693 | Active |
| 6484 | All In Septic & Excavation LLC* | (360) 598-4800 | | Active |
| 488 | American Sanitation | (360) 689-3119 | | Active |
| 34 | Bainbridge Septic Tank Pumping | (206) 842-2566 | | Active |
| 692 | Dano's Septic* | (360) 373-4404 | | Active |
| 683 | Express Septic Service* | (360) 895-5412 | | Active |
| 6210 | FloHawks LES* | (253) 393-2567 | | Active |
| 105 | Hemley's Septic Tank Cleaning Inc.* | (253) 851-3432 | (253) 851-2749 | Active |
| 125 | Kitsap Septic Pumping* | (360) 871-5258 | | Active |
| 629 | Kurt's Precast Inc. | (360) 275-1996 | | Active |
| 685 | L&L SEPTIC TANK PUMPING | (360) 779-6000 | | Active |
| 6668 | Northwest Septic | (360) 373-4404 | | Active |
| 706 | Sweetwater Septic & Grease Trap Pumping | (360) 930-2127 | | Active |