| Baker County | DEQ Pendleton Office | 800 SE Emigrant, Suite 330 Pendleton, OR 97801 | 541-276-4063 | Toll Free: 800-304-3513 | 541-278-0168 |
| Benton County | Environmental Health | 4077 SW Research Way Corvallis, OR 97333 | 541-766-6841 | | |
| Clackamas County | Septic and Onsite Wastewater Program | 150 Beavercreek Road Oregon City, OR 97045 | 503-742-4740 | | |
| Clatsop County | Clatsop County Community Development | 800 Exchange St., Suite 100 Astoria, OR 97103 | 503-325-8611 | | 503-338-3606 |
| Columbia County | Land Development Services | Columbia County Courthouse 230 Strand Street St. Helens, OR 97051 | 503-397-1501 | | 503-366-3902 |
| Coos County | DEQ Coos Bay Office | 381 North Second Street Coos Bay, OR 97420 | 541-269-2721 | Toll Free: 800-452-4011 | 541-269-7984 |
| Crook County | County Environmental Health Deptartment | Crook Co. Courthouse 300 East 3rd Street Prineville, OR 97754 | 541-447-8155 | | |
| Curry County | Curry County Community Development | For new Onsite Applications: 94235 Moore St, Suite 113 Gold Beach, OR 97444 | 541-247-3304 | septicpermits@co.curry.or.us | 541-247-4579 |
| Deschutes County | Community Development Department | 117 NW Lafayette Ave Bend, OR 97701 | 541-388-6575 | | |
| Douglas County | Douglas County Planning Department | Douglas County Courthouse Justice Bldg. Rm. 106 Roseburg, OR 97470 | 541-440-6183 | | 541-464-6429 |
| Gilliam County | North Central Public Health | 419 7th St #100 The Dalles, OR 97058 | 541-506-2600 | TTY: 800-735-2900 | 541-506-2601 |
| Grant and Harney Counties | Harney County Planning Department | 450 N. Buena Vista Burns, OR 97720 | 541-573-8174 | | |
| Hood River County | Health Department, Environmental Health | 1109 June Street Hood River, OR 97031 | 541-386-1115 | | |
| Jackson County | DEQ Medford Office | 221 Stewart Avenue, Suite 201 Medford, OR 97501 | 541-776-6010 | Toll Free: 877-823-3216 | |
| Jefferson County | Jefferson County Community Development | 85 SE D Street Madras, OR 97741 | 541-475-4453 | | |
| Josephine County | Josephine County Community Development | For Onsite applications and technical questions for Josephine and Curry counties 700 NW Dimmick Street, Suite C, Grants Pass, OR 97526 | 541-474-5444 | onsiteseptic@josephinecounty.gov | 541-474-5422 |
| Klamath County | Community Development, Onsite Sanitation Division | 305 Main Street Klamath Falls, OR 97601 | 541-883-5121 | Toll Free: 888-847-1878 | 541-885-3643 |
| Lake County | Lake County Building Department | 513 Center Street Lakeview, OR 97630 | 541-947-6033 | | |
| Lane County | Land Management Division | 3050 N. Delta Highway Eugene, OR 97408 | 541-682-3754 | | 541-682-3947 |
| Lincoln County | Planning and Development, Onsite Waste Mgmt. Division | 210 SW 2nd Street Newport, OR 97365 | 541-265-4192 ext. 2253 | | 541-265-6945 |
| Linn County | Environmental Health Department | 300 SW 4th Avenue, Room 115 PO Box 100 Albany, OR 97321 | 541-967-3821 | Toll Free: 800-304-7468 | 541-926-2060 |
| Malheur County | Environmental Health Department | 251 "B" Street, West Vale, OR 97918 | 541-473-5186 | | |
| Marion County | Building Inspection Department | 5155 Silverton Rd. NE Salem, Oregon 97305 | 503-588-5147 | | |
| Morrow County | Umatilla County Public Health Department | 200 SE Third Street Pendleton, OR 97801 | 541-278-6394 | TTY: 800-735-2900 | |
| Multnomah County | Bureau of Development Services | 1900 SW Fourth Avenue Portland, OR 97201 | 503-823-6892 | Inspections: 503-823-7000 | |
| Polk County | Community Development Department | 850 Main Street Dallas, OR 97338 | 503-623-9237 | Inspections: 503-623-8771 | 503-623-6009 |
| Sherman County | North Central Public Health | 419 7th St #100 The Dalles, OR 97058 | 541-506-2600 | TTY: 800-735-2900 | 541-506-2601 |
| Tillamook County | Department of Community Development | 1510 B Third Street Tillamook, OR 97141 | 503-842-3408 | | 503-842-1819 |
| Umatilla County | Umatilla County Public Health Department | 200 SE Third Street Pendleton, OR | 541-278-6394 | TTY: 800-735-2900 | |
| Union County | DEQ Pendleton Office | 800 SE Emigrant, Suite 330 Pendleton, OR 97801 | 541-276-4063 | Toll Free: 800-304-3513 | 541-278-0168 |