Superior Septic ServicesSeptic service company in Marysville, WA

Superior Septic Services is ranked #7 of 93 septic service companies in Marysville by CR Score, with 62 out of 100 as of November 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

Superior Septic Services is open Monday to Saturday. Its listed hours are Monday to Friday, 8 AM – 5:30 PM; Saturday, 8 AM – 12 PM. On Saturdays it is open 8 AM to 12 PM and closed on Sundays. Hours come from the business listing; holiday hours may differ.

Serves Marysville and 9 towns within 25 miles: Woods Creek, Lake Stevens, Monroe, West Lake Stevens, Snohomish, Arlington, Everett, Duvall and Silver Firs. The list is based on the business's location and the usual service radius for septic and sewer service. Confirm your address is covered when you call.

Superior Septic Services has a rating of 4.7 from 266 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

Call Superior Septic Services on (425) 905-2485. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.