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Licensed Septic Contractors in Washington
758 licensed septic contractors in Washington, sourced from official state licensing records. Browse by city or request free quotes.
Septic (onsite wastewater) contractors handle everything from routine septic tank pumping and cleaning to repairs, inspections, and new system installation. States license each role separately (a pumper is not necessarily licensed to install, and vice versa), so match the license class to the job.
Browse Washington by city
Auburn 16Puyallup 11Bremerton 10Lake Stevens 10Tacoma 10Ellensburg 9Graham 9Seattle 9Shelton 9Arlington 8Colville 8Maple Valley 8Snohomish 8Vashon 8Bellingham 7Buckley 7Poulsbo 7Vancouver 7Enumclaw 6Kent 6Langley 6Monroe 6Mount Vernon 6Oak Harbor 6Lakewood 5Port Angeles 5Port Orchard 5Ravensdale 5Camano Island 4Everett 4Gig Harbor 4North Bend 4Olympia 4Port Townsend 4Renton 4Sequim 4Woodinville 4Anacortes 3Bonney Lake 3Chehalis 3Cle Elum 3Edmonds 3Friday Harbor 3Granite Falls 3Kelso 3Lacey 3Long Beach 3Marysville 3Moses Lake 3Okanogan 3Pasco 3Spokane 3Stanwood 3Sumner 3Aubrun 2Bainbridge Island 2Battle Ground 2Blaine 2Bothell 2Brush Prairie 2Burlington 2Centralia 2Chimacum 2Colbert 2Covington 2Deer Park 2Eatonville 2Ephrata 2Ferndale 2Fircrest 2Freeland 2Hobart 2Kettle Falls 2Kirkland 2Longview 2Lopez Island 2Milton 2Point Roberts 2Rochester 2Seabeck 2Sedro Woolley 2Selah 2Spanaway 2Steilacoom 2University Place 2Winthrop 2Yakima 2Yelm 2Aberdeen 1Addy 1Asotin 1Belfair 1Bellevue 1Bow 1Camas 1Carlsborg 1Carnation 1Castle Rock 1Cheney 1Chewelah 1Clarkston 1Clinton 1Concrete 1Coupeville 1Custer 1Davenport 1Deer Harbor 1East Wenatchee 1Eastsound 1Edgewood 1Fall City 1Federal Way 1Ford 1Fruitland 1Gold Bar 1Goldendale 1Grapeview 1Hoodsport 1Hunters 1Indianola 1Ione 1Kenmore 1Kennewick 1Kittitas 1Lakebay 1Leavenworth 1Littlerock 1Lummi Island 1Lynnwood 1Maple Falls 1McCleary 1Mill Creek 1Montesano 1Morton 1Mossyrock 1Newcastle 1Newport 1Onalaska 1Othello 1Port Ludlow 1Portland 1Pullman 1Roy 1Shaw Island 1Silverdale 1Springdale 1Stellacoom 1Sultan 1Sulton 1Tenino 1Touchet 1Tumwater 1Union 1Union Gap 1Usk 1Wenatchee 1Wenetchee 1Westport 1White Salmon 1
Where this Washington data comes from
- Washington State Dept. of Health - Credential Search · official source
- Spokane Regional Health District - Permitted OSS Installers · official source
- Snohomish Health District - Certified Pumpers, Installers & M&M Specialists · official source
- King County Public Health - Master Installers (OSS) · official source