Septic Service Companies in Washington: Ranked Lists by City (2026)
120 cities with a ranked listUpdated 0 paid placements in any rankingHow we rank →
We rank septic service companies in 120 Washington cities, 11,879 city rankings in all. The largest lists are Tukwila (168), SeaTac (167) and Bryn Mawr-Skyway (166).
Septic service companies by city in Washington
Every Washington city with a ranked list of septic service companies, largest first. Each list ranks businesses within 25 mi of the city.
Highest CR Scores among Washington septic service companies
Each score is computed within its own city list, so use the city pages to compare businesses. Shown for orientation, not as a state ranking.
| # | Business | CR Score | City list | Google rating |
|---|---|---|---|---|
| 1 | A Advanced Septic & Construction Services | 67 | #1 in Auburn | 4.8★ (2,933) |
| 2 | Baker Septic Tank Pumping | 66 | #1 in Ferndale | 4.6★ (290) |
| 3 | Zoom Drain of Seattle | 66 | #1 in Seattle | 5.0★ (835) |
| 4 | Fresh N Clean Septic | 65 | #1 in Woodinville | 4.9★ (663) |
| 5 | Basic Septic Design & Installation | 65 | #2 in Ellensburg | 5.0★ (63) |
| 6 | Central Washington Septic | 65 | #1 in Ellensburg | 5.0★ (35) |
| 7 | Blackwater Services - Septic System Service | 65 | #1 in Marysville | 4.9★ (132) |
| 8 | Sterling Septic & Plumbing LLC | 65 | #2 in Puyallup | 4.9★ (503) |
| 9 | A1 Septic Service | 64 | #2 in Marysville | 4.9★ (121) |
| 10 | Ace Tank Services | 64 | #1 in Lynden | 4.8★ (212) |