| Company Name | Owner Name | Address | Phone |
| A-Quality Septic Service | James & Linda Atkins | 206508 E. Bowles Road Kennewick WA 99337 | (509) 735-0607 |
| Able Tank & Toilet | Leonard Dietrich | 2021 Commercial Avenue Pasco WA 99336 | (509) 547-2476 |
| Ace Sales & Service Inc. | Paul & Martha Liniger | 4816 Argent Rd. Pasco WA 99301 | (509) 546-0631 |
| B.S. Pumper's | Bob Compean & Scott Para | 788 Hillcrest Road Othello WA 99344 | (509) 488-1848 |
| Baker Commodities, Inc. | James Andreoli | 150 Bridgeview Road Grandview WA 98930 | (509) 837-8686 |
| CB's Septic Service | Craig Kreutz | 10408 N. McAlister La Grande OR 97850 | (541) 963-5231 |
| Cliff's Septic Tank Service | John & Joyce Dalrymple | 1536 Mabton Road Sunnyside WA 98944 | (509)837-4060 or 582-6212 |
| Doug's Septic Service | Douglas Brown | 1586 N. Columbia Milton-Freewater OR 97862 | (541) 938-7405 |
| Express Septic | Duane & Eleanor Jenks | 10158 Kinder Road NE Moses Lake WA 98837 | (509) 765-9478 |
| Gregs Septic Pumper | Randy Gier | 14905 S. Haney Rd Kennewick WA 99336 | (509) 586-2386 |
| Iron Horse Vac., LLC | Dan & Tammy Stewart | 1915 S. Oak Street Kennewick WA 99337 | (509) 586-2446 |
| Mighty John's Septic | Melinda & Rodney McDoy | 224606 E. Mary PR SE Kennewick WA 99337 | (509) 586-2114 |
| MRP Services | Mike Duncan | 3333 NW 35th Bldg. "C" Portland OR 97210 | (800) 200-0457 |
| Ray's Twilight Septic | Jim Stroup | 2369 Davison Avenue Richland WA 99352 | (509) 375-3333 |
| Roto Rooter Service | Larry Lowry & Dennis King | 801 S. Clodfleter Rd Kennewick WA 99336 | (509) 783-7311 |
| Sunshine Portable Toilets, LLC | John Liniger | 8706 W. 6th Ave. Kennewick WA 99336 | (509) 430-7854 |
| Tee-Pee Septic, Inc. | Tami McCourtie | 1780 Roosevelt Othello WA 99344 | (509) 488-2844 |
| Valley Septic Service | William Mach | 1815 Ekelman Road Yakima WA 98909 | (509) 248-6810 |
| Waste Management/Port-O-Let | Jeff Wheatley | 1611 S. Washington Kennewick WA 99337 | (509) 586-1704 |
| Will's Septic Tank | Bill & Jeanette Wills | N-211 "I" Street Lind WA 99341 | (509) 677-3325 |